1480 lines
50 KiB
Rust
1480 lines
50 KiB
Rust
use crate::attributes;
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use crate::common::Funclet;
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use crate::context::CodegenCx;
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use crate::llvm::{self, BasicBlock, False};
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use crate::llvm::{AtomicOrdering, AtomicRmwBinOp, SynchronizationScope};
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use crate::type_::Type;
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use crate::type_of::LayoutLlvmExt;
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use crate::value::Value;
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use cstr::cstr;
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use libc::{c_char, c_uint};
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use rustc_codegen_ssa::common::{IntPredicate, RealPredicate, TypeKind};
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use rustc_codegen_ssa::mir::operand::{OperandRef, OperandValue};
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use rustc_codegen_ssa::mir::place::PlaceRef;
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use rustc_codegen_ssa::traits::*;
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use rustc_codegen_ssa::MemFlags;
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use rustc_data_structures::small_c_str::SmallCStr;
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use rustc_hir::def_id::DefId;
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use rustc_middle::ty::layout::{
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FnAbiError, FnAbiOfHelpers, FnAbiRequest, LayoutError, LayoutOfHelpers, TyAndLayout,
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};
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use rustc_middle::ty::{self, Ty, TyCtxt};
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use rustc_span::Span;
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use rustc_target::abi::{self, call::FnAbi, Align, Size, WrappingRange};
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use rustc_target::spec::{HasTargetSpec, Target};
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use std::borrow::Cow;
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use std::ffi::CStr;
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use std::iter;
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use std::ops::Deref;
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use std::ptr;
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use tracing::{debug, instrument};
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// All Builders must have an llfn associated with them
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#[must_use]
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pub struct Builder<'a, 'll, 'tcx> {
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pub llbuilder: &'ll mut llvm::Builder<'ll>,
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pub cx: &'a CodegenCx<'ll, 'tcx>,
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}
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impl Drop for Builder<'_, '_, '_> {
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fn drop(&mut self) {
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unsafe {
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llvm::LLVMDisposeBuilder(&mut *(self.llbuilder as *mut _));
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}
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}
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}
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// FIXME(eddyb) use a checked constructor when they become `const fn`.
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const EMPTY_C_STR: &CStr = unsafe { CStr::from_bytes_with_nul_unchecked(b"\0") };
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/// Empty string, to be used where LLVM expects an instruction name, indicating
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/// that the instruction is to be left unnamed (i.e. numbered, in textual IR).
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// FIXME(eddyb) pass `&CStr` directly to FFI once it's a thin pointer.
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const UNNAMED: *const c_char = EMPTY_C_STR.as_ptr();
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impl<'ll, 'tcx> BackendTypes for Builder<'_, 'll, 'tcx> {
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type Value = <CodegenCx<'ll, 'tcx> as BackendTypes>::Value;
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type Function = <CodegenCx<'ll, 'tcx> as BackendTypes>::Function;
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type BasicBlock = <CodegenCx<'ll, 'tcx> as BackendTypes>::BasicBlock;
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type Type = <CodegenCx<'ll, 'tcx> as BackendTypes>::Type;
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type Funclet = <CodegenCx<'ll, 'tcx> as BackendTypes>::Funclet;
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type DIScope = <CodegenCx<'ll, 'tcx> as BackendTypes>::DIScope;
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type DILocation = <CodegenCx<'ll, 'tcx> as BackendTypes>::DILocation;
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type DIVariable = <CodegenCx<'ll, 'tcx> as BackendTypes>::DIVariable;
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}
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impl abi::HasDataLayout for Builder<'_, '_, '_> {
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fn data_layout(&self) -> &abi::TargetDataLayout {
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self.cx.data_layout()
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}
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}
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impl<'tcx> ty::layout::HasTyCtxt<'tcx> for Builder<'_, '_, 'tcx> {
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#[inline]
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fn tcx(&self) -> TyCtxt<'tcx> {
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self.cx.tcx
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}
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}
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impl<'tcx> ty::layout::HasParamEnv<'tcx> for Builder<'_, '_, 'tcx> {
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fn param_env(&self) -> ty::ParamEnv<'tcx> {
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self.cx.param_env()
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}
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}
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impl HasTargetSpec for Builder<'_, '_, '_> {
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#[inline]
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fn target_spec(&self) -> &Target {
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self.cx.target_spec()
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}
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}
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impl<'tcx> LayoutOfHelpers<'tcx> for Builder<'_, '_, 'tcx> {
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type LayoutOfResult = TyAndLayout<'tcx>;
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#[inline]
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fn handle_layout_err(&self, err: LayoutError<'tcx>, span: Span, ty: Ty<'tcx>) -> ! {
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self.cx.handle_layout_err(err, span, ty)
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}
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}
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impl<'tcx> FnAbiOfHelpers<'tcx> for Builder<'_, '_, 'tcx> {
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type FnAbiOfResult = &'tcx FnAbi<'tcx, Ty<'tcx>>;
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#[inline]
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fn handle_fn_abi_err(
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&self,
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err: FnAbiError<'tcx>,
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span: Span,
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fn_abi_request: FnAbiRequest<'tcx>,
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) -> ! {
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self.cx.handle_fn_abi_err(err, span, fn_abi_request)
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}
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}
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impl<'ll, 'tcx> Deref for Builder<'_, 'll, 'tcx> {
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type Target = CodegenCx<'ll, 'tcx>;
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#[inline]
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fn deref(&self) -> &Self::Target {
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self.cx
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}
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}
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impl<'ll, 'tcx> HasCodegen<'tcx> for Builder<'_, 'll, 'tcx> {
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type CodegenCx = CodegenCx<'ll, 'tcx>;
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}
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macro_rules! builder_methods_for_value_instructions {
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($($name:ident($($arg:ident),*) => $llvm_capi:ident),+ $(,)?) => {
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$(fn $name(&mut self, $($arg: &'ll Value),*) -> &'ll Value {
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unsafe {
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llvm::$llvm_capi(self.llbuilder, $($arg,)* UNNAMED)
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}
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})+
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}
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}
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impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
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fn build(cx: &'a CodegenCx<'ll, 'tcx>, llbb: &'ll BasicBlock) -> Self {
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let bx = Builder::with_cx(cx);
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unsafe {
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llvm::LLVMPositionBuilderAtEnd(bx.llbuilder, llbb);
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}
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bx
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}
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fn cx(&self) -> &CodegenCx<'ll, 'tcx> {
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self.cx
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}
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fn llbb(&self) -> &'ll BasicBlock {
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unsafe { llvm::LLVMGetInsertBlock(self.llbuilder) }
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}
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fn set_span(&mut self, _span: Span) {}
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fn append_block(cx: &'a CodegenCx<'ll, 'tcx>, llfn: &'ll Value, name: &str) -> &'ll BasicBlock {
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unsafe {
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let name = SmallCStr::new(name);
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llvm::LLVMAppendBasicBlockInContext(cx.llcx, llfn, name.as_ptr())
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}
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}
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fn append_sibling_block(&mut self, name: &str) -> &'ll BasicBlock {
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Self::append_block(self.cx, self.llfn(), name)
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}
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fn switch_to_block(&mut self, llbb: Self::BasicBlock) {
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*self = Self::build(self.cx, llbb)
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}
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fn ret_void(&mut self) {
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unsafe {
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llvm::LLVMBuildRetVoid(self.llbuilder);
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}
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}
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fn ret(&mut self, v: &'ll Value) {
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unsafe {
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llvm::LLVMBuildRet(self.llbuilder, v);
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}
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}
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fn br(&mut self, dest: &'ll BasicBlock) {
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unsafe {
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llvm::LLVMBuildBr(self.llbuilder, dest);
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}
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}
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fn cond_br(
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&mut self,
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cond: &'ll Value,
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then_llbb: &'ll BasicBlock,
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else_llbb: &'ll BasicBlock,
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) {
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unsafe {
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llvm::LLVMBuildCondBr(self.llbuilder, cond, then_llbb, else_llbb);
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}
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}
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fn switch(
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&mut self,
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v: &'ll Value,
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else_llbb: &'ll BasicBlock,
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cases: impl ExactSizeIterator<Item = (u128, &'ll BasicBlock)>,
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) {
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let switch =
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unsafe { llvm::LLVMBuildSwitch(self.llbuilder, v, else_llbb, cases.len() as c_uint) };
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for (on_val, dest) in cases {
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let on_val = self.const_uint_big(self.val_ty(v), on_val);
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unsafe { llvm::LLVMAddCase(switch, on_val, dest) }
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}
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}
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fn invoke(
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&mut self,
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llty: &'ll Type,
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llfn: &'ll Value,
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args: &[&'ll Value],
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then: &'ll BasicBlock,
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catch: &'ll BasicBlock,
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funclet: Option<&Funclet<'ll>>,
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) -> &'ll Value {
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debug!("invoke {:?} with args ({:?})", llfn, args);
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let args = self.check_call("invoke", llty, llfn, args);
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let bundle = funclet.map(|funclet| funclet.bundle());
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let bundle = bundle.as_ref().map(|b| &*b.raw);
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unsafe {
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llvm::LLVMRustBuildInvoke(
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self.llbuilder,
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llty,
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llfn,
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args.as_ptr(),
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args.len() as c_uint,
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then,
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catch,
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bundle,
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UNNAMED,
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)
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}
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}
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fn unreachable(&mut self) {
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unsafe {
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llvm::LLVMBuildUnreachable(self.llbuilder);
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}
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}
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builder_methods_for_value_instructions! {
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add(a, b) => LLVMBuildAdd,
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fadd(a, b) => LLVMBuildFAdd,
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sub(a, b) => LLVMBuildSub,
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fsub(a, b) => LLVMBuildFSub,
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mul(a, b) => LLVMBuildMul,
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fmul(a, b) => LLVMBuildFMul,
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udiv(a, b) => LLVMBuildUDiv,
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exactudiv(a, b) => LLVMBuildExactUDiv,
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sdiv(a, b) => LLVMBuildSDiv,
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exactsdiv(a, b) => LLVMBuildExactSDiv,
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fdiv(a, b) => LLVMBuildFDiv,
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urem(a, b) => LLVMBuildURem,
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srem(a, b) => LLVMBuildSRem,
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frem(a, b) => LLVMBuildFRem,
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shl(a, b) => LLVMBuildShl,
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lshr(a, b) => LLVMBuildLShr,
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ashr(a, b) => LLVMBuildAShr,
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and(a, b) => LLVMBuildAnd,
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or(a, b) => LLVMBuildOr,
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xor(a, b) => LLVMBuildXor,
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neg(x) => LLVMBuildNeg,
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fneg(x) => LLVMBuildFNeg,
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not(x) => LLVMBuildNot,
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unchecked_sadd(x, y) => LLVMBuildNSWAdd,
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unchecked_uadd(x, y) => LLVMBuildNUWAdd,
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unchecked_ssub(x, y) => LLVMBuildNSWSub,
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unchecked_usub(x, y) => LLVMBuildNUWSub,
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unchecked_smul(x, y) => LLVMBuildNSWMul,
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unchecked_umul(x, y) => LLVMBuildNUWMul,
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}
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fn fadd_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
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unsafe {
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let instr = llvm::LLVMBuildFAdd(self.llbuilder, lhs, rhs, UNNAMED);
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llvm::LLVMRustSetFastMath(instr);
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instr
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}
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}
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fn fsub_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
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unsafe {
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let instr = llvm::LLVMBuildFSub(self.llbuilder, lhs, rhs, UNNAMED);
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llvm::LLVMRustSetFastMath(instr);
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instr
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}
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}
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fn fmul_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
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unsafe {
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let instr = llvm::LLVMBuildFMul(self.llbuilder, lhs, rhs, UNNAMED);
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llvm::LLVMRustSetFastMath(instr);
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instr
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}
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}
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fn fdiv_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
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unsafe {
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let instr = llvm::LLVMBuildFDiv(self.llbuilder, lhs, rhs, UNNAMED);
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llvm::LLVMRustSetFastMath(instr);
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instr
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}
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}
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fn frem_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
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unsafe {
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let instr = llvm::LLVMBuildFRem(self.llbuilder, lhs, rhs, UNNAMED);
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llvm::LLVMRustSetFastMath(instr);
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instr
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}
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}
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fn checked_binop(
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&mut self,
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oop: OverflowOp,
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ty: Ty<'_>,
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lhs: Self::Value,
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rhs: Self::Value,
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) -> (Self::Value, Self::Value) {
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use rustc_middle::ty::{Int, Uint};
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use rustc_middle::ty::{IntTy::*, UintTy::*};
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let new_kind = match ty.kind() {
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Int(t @ Isize) => Int(t.normalize(self.tcx.sess.target.pointer_width)),
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Uint(t @ Usize) => Uint(t.normalize(self.tcx.sess.target.pointer_width)),
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t @ (Uint(_) | Int(_)) => t.clone(),
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_ => panic!("tried to get overflow intrinsic for op applied to non-int type"),
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};
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let name = match oop {
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OverflowOp::Add => match new_kind {
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Int(I8) => "llvm.sadd.with.overflow.i8",
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Int(I16) => "llvm.sadd.with.overflow.i16",
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Int(I32) => "llvm.sadd.with.overflow.i32",
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Int(I64) => "llvm.sadd.with.overflow.i64",
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Int(I128) => "llvm.sadd.with.overflow.i128",
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Uint(U8) => "llvm.uadd.with.overflow.i8",
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Uint(U16) => "llvm.uadd.with.overflow.i16",
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Uint(U32) => "llvm.uadd.with.overflow.i32",
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Uint(U64) => "llvm.uadd.with.overflow.i64",
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Uint(U128) => "llvm.uadd.with.overflow.i128",
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_ => unreachable!(),
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},
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OverflowOp::Sub => match new_kind {
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Int(I8) => "llvm.ssub.with.overflow.i8",
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Int(I16) => "llvm.ssub.with.overflow.i16",
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Int(I32) => "llvm.ssub.with.overflow.i32",
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Int(I64) => "llvm.ssub.with.overflow.i64",
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Int(I128) => "llvm.ssub.with.overflow.i128",
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Uint(U8) => "llvm.usub.with.overflow.i8",
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Uint(U16) => "llvm.usub.with.overflow.i16",
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Uint(U32) => "llvm.usub.with.overflow.i32",
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Uint(U64) => "llvm.usub.with.overflow.i64",
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Uint(U128) => "llvm.usub.with.overflow.i128",
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|
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_ => unreachable!(),
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},
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OverflowOp::Mul => match new_kind {
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Int(I8) => "llvm.smul.with.overflow.i8",
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Int(I16) => "llvm.smul.with.overflow.i16",
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|
Int(I32) => "llvm.smul.with.overflow.i32",
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Int(I64) => "llvm.smul.with.overflow.i64",
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Int(I128) => "llvm.smul.with.overflow.i128",
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|
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|
Uint(U8) => "llvm.umul.with.overflow.i8",
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Uint(U16) => "llvm.umul.with.overflow.i16",
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Uint(U32) => "llvm.umul.with.overflow.i32",
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Uint(U64) => "llvm.umul.with.overflow.i64",
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Uint(U128) => "llvm.umul.with.overflow.i128",
|
|
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|
_ => unreachable!(),
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|
},
|
|
};
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|
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|
let res = self.call_intrinsic(name, &[lhs, rhs]);
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(self.extract_value(res, 0), self.extract_value(res, 1))
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}
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|
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|
fn from_immediate(&mut self, val: Self::Value) -> Self::Value {
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if self.cx().val_ty(val) == self.cx().type_i1() {
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self.zext(val, self.cx().type_i8())
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} else {
|
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val
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|
}
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}
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|
fn to_immediate_scalar(&mut self, val: Self::Value, scalar: abi::Scalar) -> Self::Value {
|
|
if scalar.is_bool() {
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return self.trunc(val, self.cx().type_i1());
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|
}
|
|
val
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}
|
|
|
|
fn alloca(&mut self, ty: &'ll Type, align: Align) -> &'ll Value {
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|
let mut bx = Builder::with_cx(self.cx);
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bx.position_at_start(unsafe { llvm::LLVMGetFirstBasicBlock(self.llfn()) });
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bx.dynamic_alloca(ty, align)
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|
}
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|
|
|
fn dynamic_alloca(&mut self, ty: &'ll Type, align: Align) -> &'ll Value {
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unsafe {
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let alloca = llvm::LLVMBuildAlloca(self.llbuilder, ty, UNNAMED);
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llvm::LLVMSetAlignment(alloca, align.bytes() as c_uint);
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alloca
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}
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|
}
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|
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|
fn array_alloca(&mut self, ty: &'ll Type, len: &'ll Value, align: Align) -> &'ll Value {
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unsafe {
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let alloca = llvm::LLVMBuildArrayAlloca(self.llbuilder, ty, len, UNNAMED);
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llvm::LLVMSetAlignment(alloca, align.bytes() as c_uint);
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alloca
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}
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}
|
|
|
|
fn load(&mut self, ty: &'ll Type, ptr: &'ll Value, align: Align) -> &'ll Value {
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unsafe {
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let load = llvm::LLVMBuildLoad2(self.llbuilder, ty, ptr, UNNAMED);
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llvm::LLVMSetAlignment(load, align.bytes() as c_uint);
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load
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|
}
|
|
}
|
|
|
|
fn volatile_load(&mut self, ty: &'ll Type, ptr: &'ll Value) -> &'ll Value {
|
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unsafe {
|
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let load = llvm::LLVMBuildLoad2(self.llbuilder, ty, ptr, UNNAMED);
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llvm::LLVMSetVolatile(load, llvm::True);
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load
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|
}
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|
}
|
|
|
|
fn atomic_load(
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|
&mut self,
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ty: &'ll Type,
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|
ptr: &'ll Value,
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|
order: rustc_codegen_ssa::common::AtomicOrdering,
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size: Size,
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|
) -> &'ll Value {
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unsafe {
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let load = llvm::LLVMRustBuildAtomicLoad(
|
|
self.llbuilder,
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|
ty,
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ptr,
|
|
UNNAMED,
|
|
AtomicOrdering::from_generic(order),
|
|
);
|
|
// LLVM requires the alignment of atomic loads to be at least the size of the type.
|
|
llvm::LLVMSetAlignment(load, size.bytes() as c_uint);
|
|
load
|
|
}
|
|
}
|
|
|
|
#[instrument(level = "trace", skip(self))]
|
|
fn load_operand(&mut self, place: PlaceRef<'tcx, &'ll Value>) -> OperandRef<'tcx, &'ll Value> {
|
|
assert_eq!(place.llextra.is_some(), place.layout.is_unsized());
|
|
|
|
if place.layout.is_zst() {
|
|
return OperandRef::new_zst(self, place.layout);
|
|
}
|
|
|
|
#[instrument(level = "trace", skip(bx))]
|
|
fn scalar_load_metadata<'a, 'll, 'tcx>(
|
|
bx: &mut Builder<'a, 'll, 'tcx>,
|
|
load: &'ll Value,
|
|
scalar: abi::Scalar,
|
|
layout: TyAndLayout<'tcx>,
|
|
offset: Size,
|
|
) {
|
|
if !scalar.is_always_valid(bx) {
|
|
bx.noundef_metadata(load);
|
|
}
|
|
|
|
match scalar.primitive() {
|
|
abi::Int(..) => {
|
|
if !scalar.is_always_valid(bx) {
|
|
bx.range_metadata(load, scalar.valid_range(bx));
|
|
}
|
|
}
|
|
abi::Pointer => {
|
|
if !scalar.valid_range(bx).contains(0) {
|
|
bx.nonnull_metadata(load);
|
|
}
|
|
|
|
if let Some(pointee) = layout.pointee_info_at(bx, offset) {
|
|
if let Some(_) = pointee.safe {
|
|
bx.align_metadata(load, pointee.align);
|
|
}
|
|
}
|
|
}
|
|
abi::F32 | abi::F64 => {}
|
|
}
|
|
}
|
|
|
|
let val = if let Some(llextra) = place.llextra {
|
|
OperandValue::Ref(place.llval, Some(llextra), place.align)
|
|
} else if place.layout.is_llvm_immediate() {
|
|
let mut const_llval = None;
|
|
let llty = place.layout.llvm_type(self);
|
|
unsafe {
|
|
if let Some(global) = llvm::LLVMIsAGlobalVariable(place.llval) {
|
|
if llvm::LLVMIsGlobalConstant(global) == llvm::True {
|
|
if let Some(init) = llvm::LLVMGetInitializer(global) {
|
|
if self.val_ty(init) == llty {
|
|
const_llval = Some(init);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
let llval = const_llval.unwrap_or_else(|| {
|
|
let load = self.load(llty, place.llval, place.align);
|
|
if let abi::Abi::Scalar(scalar) = place.layout.abi {
|
|
scalar_load_metadata(self, load, scalar, place.layout, Size::ZERO);
|
|
}
|
|
load
|
|
});
|
|
OperandValue::Immediate(self.to_immediate(llval, place.layout))
|
|
} else if let abi::Abi::ScalarPair(a, b) = place.layout.abi {
|
|
let b_offset = a.size(self).align_to(b.align(self).abi);
|
|
let pair_ty = place.layout.llvm_type(self);
|
|
|
|
let mut load = |i, scalar: abi::Scalar, layout, align, offset| {
|
|
let llptr = self.struct_gep(pair_ty, place.llval, i as u64);
|
|
let llty = place.layout.scalar_pair_element_llvm_type(self, i, false);
|
|
let load = self.load(llty, llptr, align);
|
|
scalar_load_metadata(self, load, scalar, layout, offset);
|
|
self.to_immediate_scalar(load, scalar)
|
|
};
|
|
|
|
OperandValue::Pair(
|
|
load(0, a, place.layout, place.align, Size::ZERO),
|
|
load(1, b, place.layout, place.align.restrict_for_offset(b_offset), b_offset),
|
|
)
|
|
} else {
|
|
OperandValue::Ref(place.llval, None, place.align)
|
|
};
|
|
|
|
OperandRef { val, layout: place.layout }
|
|
}
|
|
|
|
fn write_operand_repeatedly(
|
|
mut self,
|
|
cg_elem: OperandRef<'tcx, &'ll Value>,
|
|
count: u64,
|
|
dest: PlaceRef<'tcx, &'ll Value>,
|
|
) -> Self {
|
|
let zero = self.const_usize(0);
|
|
let count = self.const_usize(count);
|
|
let start = dest.project_index(&mut self, zero).llval;
|
|
let end = dest.project_index(&mut self, count).llval;
|
|
|
|
let header_bb = self.append_sibling_block("repeat_loop_header");
|
|
let body_bb = self.append_sibling_block("repeat_loop_body");
|
|
let next_bb = self.append_sibling_block("repeat_loop_next");
|
|
|
|
self.br(header_bb);
|
|
|
|
let mut header_bx = Self::build(self.cx, header_bb);
|
|
let current = header_bx.phi(self.val_ty(start), &[start], &[self.llbb()]);
|
|
|
|
let keep_going = header_bx.icmp(IntPredicate::IntNE, current, end);
|
|
header_bx.cond_br(keep_going, body_bb, next_bb);
|
|
|
|
let mut body_bx = Self::build(self.cx, body_bb);
|
|
let align = dest.align.restrict_for_offset(dest.layout.field(self.cx(), 0).size);
|
|
cg_elem
|
|
.val
|
|
.store(&mut body_bx, PlaceRef::new_sized_aligned(current, cg_elem.layout, align));
|
|
|
|
let next = body_bx.inbounds_gep(
|
|
self.backend_type(cg_elem.layout),
|
|
current,
|
|
&[self.const_usize(1)],
|
|
);
|
|
body_bx.br(header_bb);
|
|
header_bx.add_incoming_to_phi(current, next, body_bb);
|
|
|
|
Self::build(self.cx, next_bb)
|
|
}
|
|
|
|
fn range_metadata(&mut self, load: &'ll Value, range: WrappingRange) {
|
|
if self.sess().target.arch == "amdgpu" {
|
|
// amdgpu/LLVM does something weird and thinks an i64 value is
|
|
// split into a v2i32, halving the bitwidth LLVM expects,
|
|
// tripping an assertion. So, for now, just disable this
|
|
// optimization.
|
|
return;
|
|
}
|
|
|
|
unsafe {
|
|
let llty = self.cx.val_ty(load);
|
|
let v = [
|
|
self.cx.const_uint_big(llty, range.start),
|
|
self.cx.const_uint_big(llty, range.end.wrapping_add(1)),
|
|
];
|
|
|
|
llvm::LLVMSetMetadata(
|
|
load,
|
|
llvm::MD_range as c_uint,
|
|
llvm::LLVMMDNodeInContext(self.cx.llcx, v.as_ptr(), v.len() as c_uint),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn nonnull_metadata(&mut self, load: &'ll Value) {
|
|
unsafe {
|
|
llvm::LLVMSetMetadata(
|
|
load,
|
|
llvm::MD_nonnull as c_uint,
|
|
llvm::LLVMMDNodeInContext(self.cx.llcx, ptr::null(), 0),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn store(&mut self, val: &'ll Value, ptr: &'ll Value, align: Align) -> &'ll Value {
|
|
self.store_with_flags(val, ptr, align, MemFlags::empty())
|
|
}
|
|
|
|
fn store_with_flags(
|
|
&mut self,
|
|
val: &'ll Value,
|
|
ptr: &'ll Value,
|
|
align: Align,
|
|
flags: MemFlags,
|
|
) -> &'ll Value {
|
|
debug!("Store {:?} -> {:?} ({:?})", val, ptr, flags);
|
|
let ptr = self.check_store(val, ptr);
|
|
unsafe {
|
|
let store = llvm::LLVMBuildStore(self.llbuilder, val, ptr);
|
|
let align =
|
|
if flags.contains(MemFlags::UNALIGNED) { 1 } else { align.bytes() as c_uint };
|
|
llvm::LLVMSetAlignment(store, align);
|
|
if flags.contains(MemFlags::VOLATILE) {
|
|
llvm::LLVMSetVolatile(store, llvm::True);
|
|
}
|
|
if flags.contains(MemFlags::NONTEMPORAL) {
|
|
// According to LLVM [1] building a nontemporal store must
|
|
// *always* point to a metadata value of the integer 1.
|
|
//
|
|
// [1]: https://llvm.org/docs/LangRef.html#store-instruction
|
|
let one = self.cx.const_i32(1);
|
|
let node = llvm::LLVMMDNodeInContext(self.cx.llcx, &one, 1);
|
|
llvm::LLVMSetMetadata(store, llvm::MD_nontemporal as c_uint, node);
|
|
}
|
|
store
|
|
}
|
|
}
|
|
|
|
fn atomic_store(
|
|
&mut self,
|
|
val: &'ll Value,
|
|
ptr: &'ll Value,
|
|
order: rustc_codegen_ssa::common::AtomicOrdering,
|
|
size: Size,
|
|
) {
|
|
debug!("Store {:?} -> {:?}", val, ptr);
|
|
let ptr = self.check_store(val, ptr);
|
|
unsafe {
|
|
let store = llvm::LLVMRustBuildAtomicStore(
|
|
self.llbuilder,
|
|
val,
|
|
ptr,
|
|
AtomicOrdering::from_generic(order),
|
|
);
|
|
// LLVM requires the alignment of atomic stores to be at least the size of the type.
|
|
llvm::LLVMSetAlignment(store, size.bytes() as c_uint);
|
|
}
|
|
}
|
|
|
|
fn gep(&mut self, ty: &'ll Type, ptr: &'ll Value, indices: &[&'ll Value]) -> &'ll Value {
|
|
unsafe {
|
|
llvm::LLVMBuildGEP2(
|
|
self.llbuilder,
|
|
ty,
|
|
ptr,
|
|
indices.as_ptr(),
|
|
indices.len() as c_uint,
|
|
UNNAMED,
|
|
)
|
|
}
|
|
}
|
|
|
|
fn inbounds_gep(
|
|
&mut self,
|
|
ty: &'ll Type,
|
|
ptr: &'ll Value,
|
|
indices: &[&'ll Value],
|
|
) -> &'ll Value {
|
|
unsafe {
|
|
llvm::LLVMBuildInBoundsGEP2(
|
|
self.llbuilder,
|
|
ty,
|
|
ptr,
|
|
indices.as_ptr(),
|
|
indices.len() as c_uint,
|
|
UNNAMED,
|
|
)
|
|
}
|
|
}
|
|
|
|
fn struct_gep(&mut self, ty: &'ll Type, ptr: &'ll Value, idx: u64) -> &'ll Value {
|
|
assert_eq!(idx as c_uint as u64, idx);
|
|
unsafe { llvm::LLVMBuildStructGEP2(self.llbuilder, ty, ptr, idx as c_uint, UNNAMED) }
|
|
}
|
|
|
|
/* Casts */
|
|
fn trunc(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildTrunc(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn sext(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildSExt(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn fptoui_sat(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> Option<&'ll Value> {
|
|
self.fptoint_sat(false, val, dest_ty)
|
|
}
|
|
|
|
fn fptosi_sat(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> Option<&'ll Value> {
|
|
self.fptoint_sat(true, val, dest_ty)
|
|
}
|
|
|
|
fn fptoui(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
// On WebAssembly the `fptoui` and `fptosi` instructions currently have
|
|
// poor codegen. The reason for this is that the corresponding wasm
|
|
// instructions, `i32.trunc_f32_s` for example, will trap when the float
|
|
// is out-of-bounds, infinity, or nan. This means that LLVM
|
|
// automatically inserts control flow around `fptoui` and `fptosi`
|
|
// because the LLVM instruction `fptoui` is defined as producing a
|
|
// poison value, not having UB on out-of-bounds values.
|
|
//
|
|
// This method, however, is only used with non-saturating casts that
|
|
// have UB on out-of-bounds values. This means that it's ok if we use
|
|
// the raw wasm instruction since out-of-bounds values can do whatever
|
|
// we like. To ensure that LLVM picks the right instruction we choose
|
|
// the raw wasm intrinsic functions which avoid LLVM inserting all the
|
|
// other control flow automatically.
|
|
if self.sess().target.is_like_wasm {
|
|
let src_ty = self.cx.val_ty(val);
|
|
if self.cx.type_kind(src_ty) != TypeKind::Vector {
|
|
let float_width = self.cx.float_width(src_ty);
|
|
let int_width = self.cx.int_width(dest_ty);
|
|
let name = match (int_width, float_width) {
|
|
(32, 32) => Some("llvm.wasm.trunc.unsigned.i32.f32"),
|
|
(32, 64) => Some("llvm.wasm.trunc.unsigned.i32.f64"),
|
|
(64, 32) => Some("llvm.wasm.trunc.unsigned.i64.f32"),
|
|
(64, 64) => Some("llvm.wasm.trunc.unsigned.i64.f64"),
|
|
_ => None,
|
|
};
|
|
if let Some(name) = name {
|
|
return self.call_intrinsic(name, &[val]);
|
|
}
|
|
}
|
|
}
|
|
unsafe { llvm::LLVMBuildFPToUI(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn fptosi(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
// see `fptoui` above for why wasm is different here
|
|
if self.sess().target.is_like_wasm {
|
|
let src_ty = self.cx.val_ty(val);
|
|
if self.cx.type_kind(src_ty) != TypeKind::Vector {
|
|
let float_width = self.cx.float_width(src_ty);
|
|
let int_width = self.cx.int_width(dest_ty);
|
|
let name = match (int_width, float_width) {
|
|
(32, 32) => Some("llvm.wasm.trunc.signed.i32.f32"),
|
|
(32, 64) => Some("llvm.wasm.trunc.signed.i32.f64"),
|
|
(64, 32) => Some("llvm.wasm.trunc.signed.i64.f32"),
|
|
(64, 64) => Some("llvm.wasm.trunc.signed.i64.f64"),
|
|
_ => None,
|
|
};
|
|
if let Some(name) = name {
|
|
return self.call_intrinsic(name, &[val]);
|
|
}
|
|
}
|
|
}
|
|
unsafe { llvm::LLVMBuildFPToSI(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn uitofp(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildUIToFP(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn sitofp(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildSIToFP(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn fptrunc(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildFPTrunc(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn fpext(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildFPExt(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn ptrtoint(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildPtrToInt(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn inttoptr(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildIntToPtr(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn bitcast(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildBitCast(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn intcast(&mut self, val: &'ll Value, dest_ty: &'ll Type, is_signed: bool) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildIntCast(self.llbuilder, val, dest_ty, is_signed) }
|
|
}
|
|
|
|
fn pointercast(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildPointerCast(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
/* Comparisons */
|
|
fn icmp(&mut self, op: IntPredicate, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
|
|
let op = llvm::IntPredicate::from_generic(op);
|
|
unsafe { llvm::LLVMBuildICmp(self.llbuilder, op as c_uint, lhs, rhs, UNNAMED) }
|
|
}
|
|
|
|
fn fcmp(&mut self, op: RealPredicate, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
|
|
let op = llvm::RealPredicate::from_generic(op);
|
|
unsafe { llvm::LLVMBuildFCmp(self.llbuilder, op as c_uint, lhs, rhs, UNNAMED) }
|
|
}
|
|
|
|
/* Miscellaneous instructions */
|
|
fn memcpy(
|
|
&mut self,
|
|
dst: &'ll Value,
|
|
dst_align: Align,
|
|
src: &'ll Value,
|
|
src_align: Align,
|
|
size: &'ll Value,
|
|
flags: MemFlags,
|
|
) {
|
|
assert!(!flags.contains(MemFlags::NONTEMPORAL), "non-temporal memcpy not supported");
|
|
let size = self.intcast(size, self.type_isize(), false);
|
|
let is_volatile = flags.contains(MemFlags::VOLATILE);
|
|
let dst = self.pointercast(dst, self.type_i8p());
|
|
let src = self.pointercast(src, self.type_i8p());
|
|
unsafe {
|
|
llvm::LLVMRustBuildMemCpy(
|
|
self.llbuilder,
|
|
dst,
|
|
dst_align.bytes() as c_uint,
|
|
src,
|
|
src_align.bytes() as c_uint,
|
|
size,
|
|
is_volatile,
|
|
);
|
|
}
|
|
}
|
|
|
|
fn memmove(
|
|
&mut self,
|
|
dst: &'ll Value,
|
|
dst_align: Align,
|
|
src: &'ll Value,
|
|
src_align: Align,
|
|
size: &'ll Value,
|
|
flags: MemFlags,
|
|
) {
|
|
assert!(!flags.contains(MemFlags::NONTEMPORAL), "non-temporal memmove not supported");
|
|
let size = self.intcast(size, self.type_isize(), false);
|
|
let is_volatile = flags.contains(MemFlags::VOLATILE);
|
|
let dst = self.pointercast(dst, self.type_i8p());
|
|
let src = self.pointercast(src, self.type_i8p());
|
|
unsafe {
|
|
llvm::LLVMRustBuildMemMove(
|
|
self.llbuilder,
|
|
dst,
|
|
dst_align.bytes() as c_uint,
|
|
src,
|
|
src_align.bytes() as c_uint,
|
|
size,
|
|
is_volatile,
|
|
);
|
|
}
|
|
}
|
|
|
|
fn memset(
|
|
&mut self,
|
|
ptr: &'ll Value,
|
|
fill_byte: &'ll Value,
|
|
size: &'ll Value,
|
|
align: Align,
|
|
flags: MemFlags,
|
|
) {
|
|
let is_volatile = flags.contains(MemFlags::VOLATILE);
|
|
let ptr = self.pointercast(ptr, self.type_i8p());
|
|
unsafe {
|
|
llvm::LLVMRustBuildMemSet(
|
|
self.llbuilder,
|
|
ptr,
|
|
align.bytes() as c_uint,
|
|
fill_byte,
|
|
size,
|
|
is_volatile,
|
|
);
|
|
}
|
|
}
|
|
|
|
fn select(
|
|
&mut self,
|
|
cond: &'ll Value,
|
|
then_val: &'ll Value,
|
|
else_val: &'ll Value,
|
|
) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildSelect(self.llbuilder, cond, then_val, else_val, UNNAMED) }
|
|
}
|
|
|
|
fn va_arg(&mut self, list: &'ll Value, ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildVAArg(self.llbuilder, list, ty, UNNAMED) }
|
|
}
|
|
|
|
fn extract_element(&mut self, vec: &'ll Value, idx: &'ll Value) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildExtractElement(self.llbuilder, vec, idx, UNNAMED) }
|
|
}
|
|
|
|
fn vector_splat(&mut self, num_elts: usize, elt: &'ll Value) -> &'ll Value {
|
|
unsafe {
|
|
let elt_ty = self.cx.val_ty(elt);
|
|
let undef = llvm::LLVMGetUndef(self.type_vector(elt_ty, num_elts as u64));
|
|
let vec = self.insert_element(undef, elt, self.cx.const_i32(0));
|
|
let vec_i32_ty = self.type_vector(self.type_i32(), num_elts as u64);
|
|
self.shuffle_vector(vec, undef, self.const_null(vec_i32_ty))
|
|
}
|
|
}
|
|
|
|
fn extract_value(&mut self, agg_val: &'ll Value, idx: u64) -> &'ll Value {
|
|
assert_eq!(idx as c_uint as u64, idx);
|
|
unsafe { llvm::LLVMBuildExtractValue(self.llbuilder, agg_val, idx as c_uint, UNNAMED) }
|
|
}
|
|
|
|
fn insert_value(&mut self, agg_val: &'ll Value, elt: &'ll Value, idx: u64) -> &'ll Value {
|
|
assert_eq!(idx as c_uint as u64, idx);
|
|
unsafe { llvm::LLVMBuildInsertValue(self.llbuilder, agg_val, elt, idx as c_uint, UNNAMED) }
|
|
}
|
|
|
|
fn set_personality_fn(&mut self, personality: &'ll Value) {
|
|
unsafe {
|
|
llvm::LLVMSetPersonalityFn(self.llfn(), personality);
|
|
}
|
|
}
|
|
|
|
fn cleanup_landing_pad(&mut self, ty: &'ll Type, pers_fn: &'ll Value) -> &'ll Value {
|
|
let landing_pad = self.landing_pad(ty, pers_fn, 1 /* FIXME should this be 0? */);
|
|
unsafe {
|
|
llvm::LLVMSetCleanup(landing_pad, llvm::True);
|
|
}
|
|
landing_pad
|
|
}
|
|
|
|
fn resume(&mut self, exn: &'ll Value) {
|
|
unsafe {
|
|
llvm::LLVMBuildResume(self.llbuilder, exn);
|
|
}
|
|
}
|
|
|
|
fn cleanup_pad(&mut self, parent: Option<&'ll Value>, args: &[&'ll Value]) -> Funclet<'ll> {
|
|
let name = cstr!("cleanuppad");
|
|
let ret = unsafe {
|
|
llvm::LLVMRustBuildCleanupPad(
|
|
self.llbuilder,
|
|
parent,
|
|
args.len() as c_uint,
|
|
args.as_ptr(),
|
|
name.as_ptr(),
|
|
)
|
|
};
|
|
Funclet::new(ret.expect("LLVM does not have support for cleanuppad"))
|
|
}
|
|
|
|
fn cleanup_ret(&mut self, funclet: &Funclet<'ll>, unwind: Option<&'ll BasicBlock>) {
|
|
unsafe {
|
|
llvm::LLVMRustBuildCleanupRet(self.llbuilder, funclet.cleanuppad(), unwind)
|
|
.expect("LLVM does not have support for cleanupret");
|
|
}
|
|
}
|
|
|
|
fn catch_pad(&mut self, parent: &'ll Value, args: &[&'ll Value]) -> Funclet<'ll> {
|
|
let name = cstr!("catchpad");
|
|
let ret = unsafe {
|
|
llvm::LLVMRustBuildCatchPad(
|
|
self.llbuilder,
|
|
parent,
|
|
args.len() as c_uint,
|
|
args.as_ptr(),
|
|
name.as_ptr(),
|
|
)
|
|
};
|
|
Funclet::new(ret.expect("LLVM does not have support for catchpad"))
|
|
}
|
|
|
|
fn catch_switch(
|
|
&mut self,
|
|
parent: Option<&'ll Value>,
|
|
unwind: Option<&'ll BasicBlock>,
|
|
handlers: &[&'ll BasicBlock],
|
|
) -> &'ll Value {
|
|
let name = cstr!("catchswitch");
|
|
let ret = unsafe {
|
|
llvm::LLVMRustBuildCatchSwitch(
|
|
self.llbuilder,
|
|
parent,
|
|
unwind,
|
|
handlers.len() as c_uint,
|
|
name.as_ptr(),
|
|
)
|
|
};
|
|
let ret = ret.expect("LLVM does not have support for catchswitch");
|
|
for handler in handlers {
|
|
unsafe {
|
|
llvm::LLVMRustAddHandler(ret, handler);
|
|
}
|
|
}
|
|
ret
|
|
}
|
|
|
|
// Atomic Operations
|
|
fn atomic_cmpxchg(
|
|
&mut self,
|
|
dst: &'ll Value,
|
|
cmp: &'ll Value,
|
|
src: &'ll Value,
|
|
order: rustc_codegen_ssa::common::AtomicOrdering,
|
|
failure_order: rustc_codegen_ssa::common::AtomicOrdering,
|
|
weak: bool,
|
|
) -> &'ll Value {
|
|
let weak = if weak { llvm::True } else { llvm::False };
|
|
unsafe {
|
|
llvm::LLVMRustBuildAtomicCmpXchg(
|
|
self.llbuilder,
|
|
dst,
|
|
cmp,
|
|
src,
|
|
AtomicOrdering::from_generic(order),
|
|
AtomicOrdering::from_generic(failure_order),
|
|
weak,
|
|
)
|
|
}
|
|
}
|
|
fn atomic_rmw(
|
|
&mut self,
|
|
op: rustc_codegen_ssa::common::AtomicRmwBinOp,
|
|
dst: &'ll Value,
|
|
src: &'ll Value,
|
|
order: rustc_codegen_ssa::common::AtomicOrdering,
|
|
) -> &'ll Value {
|
|
unsafe {
|
|
llvm::LLVMBuildAtomicRMW(
|
|
self.llbuilder,
|
|
AtomicRmwBinOp::from_generic(op),
|
|
dst,
|
|
src,
|
|
AtomicOrdering::from_generic(order),
|
|
False,
|
|
)
|
|
}
|
|
}
|
|
|
|
fn atomic_fence(
|
|
&mut self,
|
|
order: rustc_codegen_ssa::common::AtomicOrdering,
|
|
scope: rustc_codegen_ssa::common::SynchronizationScope,
|
|
) {
|
|
unsafe {
|
|
llvm::LLVMRustBuildAtomicFence(
|
|
self.llbuilder,
|
|
AtomicOrdering::from_generic(order),
|
|
SynchronizationScope::from_generic(scope),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn set_invariant_load(&mut self, load: &'ll Value) {
|
|
unsafe {
|
|
llvm::LLVMSetMetadata(
|
|
load,
|
|
llvm::MD_invariant_load as c_uint,
|
|
llvm::LLVMMDNodeInContext(self.cx.llcx, ptr::null(), 0),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn lifetime_start(&mut self, ptr: &'ll Value, size: Size) {
|
|
self.call_lifetime_intrinsic("llvm.lifetime.start.p0i8", ptr, size);
|
|
}
|
|
|
|
fn lifetime_end(&mut self, ptr: &'ll Value, size: Size) {
|
|
self.call_lifetime_intrinsic("llvm.lifetime.end.p0i8", ptr, size);
|
|
}
|
|
|
|
fn instrprof_increment(
|
|
&mut self,
|
|
fn_name: &'ll Value,
|
|
hash: &'ll Value,
|
|
num_counters: &'ll Value,
|
|
index: &'ll Value,
|
|
) {
|
|
debug!(
|
|
"instrprof_increment() with args ({:?}, {:?}, {:?}, {:?})",
|
|
fn_name, hash, num_counters, index
|
|
);
|
|
|
|
let llfn = unsafe { llvm::LLVMRustGetInstrProfIncrementIntrinsic(self.cx().llmod) };
|
|
let llty = self.cx.type_func(
|
|
&[self.cx.type_i8p(), self.cx.type_i64(), self.cx.type_i32(), self.cx.type_i32()],
|
|
self.cx.type_void(),
|
|
);
|
|
let args = &[fn_name, hash, num_counters, index];
|
|
let args = self.check_call("call", llty, llfn, args);
|
|
|
|
unsafe {
|
|
let _ = llvm::LLVMRustBuildCall(
|
|
self.llbuilder,
|
|
llty,
|
|
llfn,
|
|
args.as_ptr() as *const &llvm::Value,
|
|
args.len() as c_uint,
|
|
None,
|
|
);
|
|
}
|
|
}
|
|
|
|
fn call(
|
|
&mut self,
|
|
llty: &'ll Type,
|
|
llfn: &'ll Value,
|
|
args: &[&'ll Value],
|
|
funclet: Option<&Funclet<'ll>>,
|
|
) -> &'ll Value {
|
|
debug!("call {:?} with args ({:?})", llfn, args);
|
|
|
|
let args = self.check_call("call", llty, llfn, args);
|
|
let bundle = funclet.map(|funclet| funclet.bundle());
|
|
let bundle = bundle.as_ref().map(|b| &*b.raw);
|
|
|
|
unsafe {
|
|
llvm::LLVMRustBuildCall(
|
|
self.llbuilder,
|
|
llty,
|
|
llfn,
|
|
args.as_ptr() as *const &llvm::Value,
|
|
args.len() as c_uint,
|
|
bundle,
|
|
)
|
|
}
|
|
}
|
|
|
|
fn zext(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildZExt(self.llbuilder, val, dest_ty, UNNAMED) }
|
|
}
|
|
|
|
fn do_not_inline(&mut self, llret: &'ll Value) {
|
|
let noinline = llvm::AttributeKind::NoInline.create_attr(self.llcx);
|
|
attributes::apply_to_callsite(llret, llvm::AttributePlace::Function, &[noinline]);
|
|
}
|
|
}
|
|
|
|
impl<'ll> StaticBuilderMethods for Builder<'_, 'll, '_> {
|
|
fn get_static(&mut self, def_id: DefId) -> &'ll Value {
|
|
// Forward to the `get_static` method of `CodegenCx`
|
|
self.cx().get_static(def_id)
|
|
}
|
|
}
|
|
|
|
impl<'a, 'll, 'tcx> Builder<'a, 'll, 'tcx> {
|
|
fn with_cx(cx: &'a CodegenCx<'ll, 'tcx>) -> Self {
|
|
// Create a fresh builder from the crate context.
|
|
let llbuilder = unsafe { llvm::LLVMCreateBuilderInContext(cx.llcx) };
|
|
Builder { llbuilder, cx }
|
|
}
|
|
|
|
pub fn llfn(&self) -> &'ll Value {
|
|
unsafe { llvm::LLVMGetBasicBlockParent(self.llbb()) }
|
|
}
|
|
|
|
fn position_at_start(&mut self, llbb: &'ll BasicBlock) {
|
|
unsafe {
|
|
llvm::LLVMRustPositionBuilderAtStart(self.llbuilder, llbb);
|
|
}
|
|
}
|
|
|
|
fn align_metadata(&mut self, load: &'ll Value, align: Align) {
|
|
unsafe {
|
|
let v = [self.cx.const_u64(align.bytes())];
|
|
|
|
llvm::LLVMSetMetadata(
|
|
load,
|
|
llvm::MD_align as c_uint,
|
|
llvm::LLVMMDNodeInContext(self.cx.llcx, v.as_ptr(), v.len() as c_uint),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn noundef_metadata(&mut self, load: &'ll Value) {
|
|
unsafe {
|
|
llvm::LLVMSetMetadata(
|
|
load,
|
|
llvm::MD_noundef as c_uint,
|
|
llvm::LLVMMDNodeInContext(self.cx.llcx, ptr::null(), 0),
|
|
);
|
|
}
|
|
}
|
|
|
|
pub fn minnum(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildMinNum(self.llbuilder, lhs, rhs) }
|
|
}
|
|
|
|
pub fn maxnum(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildMaxNum(self.llbuilder, lhs, rhs) }
|
|
}
|
|
|
|
pub fn insert_element(
|
|
&mut self,
|
|
vec: &'ll Value,
|
|
elt: &'ll Value,
|
|
idx: &'ll Value,
|
|
) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildInsertElement(self.llbuilder, vec, elt, idx, UNNAMED) }
|
|
}
|
|
|
|
pub fn shuffle_vector(
|
|
&mut self,
|
|
v1: &'ll Value,
|
|
v2: &'ll Value,
|
|
mask: &'ll Value,
|
|
) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildShuffleVector(self.llbuilder, v1, v2, mask, UNNAMED) }
|
|
}
|
|
|
|
pub fn vector_reduce_fadd(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildVectorReduceFAdd(self.llbuilder, acc, src) }
|
|
}
|
|
pub fn vector_reduce_fmul(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildVectorReduceFMul(self.llbuilder, acc, src) }
|
|
}
|
|
pub fn vector_reduce_fadd_fast(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
|
|
unsafe {
|
|
let instr = llvm::LLVMRustBuildVectorReduceFAdd(self.llbuilder, acc, src);
|
|
llvm::LLVMRustSetFastMath(instr);
|
|
instr
|
|
}
|
|
}
|
|
pub fn vector_reduce_fmul_fast(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
|
|
unsafe {
|
|
let instr = llvm::LLVMRustBuildVectorReduceFMul(self.llbuilder, acc, src);
|
|
llvm::LLVMRustSetFastMath(instr);
|
|
instr
|
|
}
|
|
}
|
|
pub fn vector_reduce_add(&mut self, src: &'ll Value) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildVectorReduceAdd(self.llbuilder, src) }
|
|
}
|
|
pub fn vector_reduce_mul(&mut self, src: &'ll Value) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildVectorReduceMul(self.llbuilder, src) }
|
|
}
|
|
pub fn vector_reduce_and(&mut self, src: &'ll Value) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildVectorReduceAnd(self.llbuilder, src) }
|
|
}
|
|
pub fn vector_reduce_or(&mut self, src: &'ll Value) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildVectorReduceOr(self.llbuilder, src) }
|
|
}
|
|
pub fn vector_reduce_xor(&mut self, src: &'ll Value) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildVectorReduceXor(self.llbuilder, src) }
|
|
}
|
|
pub fn vector_reduce_fmin(&mut self, src: &'ll Value) -> &'ll Value {
|
|
unsafe {
|
|
llvm::LLVMRustBuildVectorReduceFMin(self.llbuilder, src, /*NoNaNs:*/ false)
|
|
}
|
|
}
|
|
pub fn vector_reduce_fmax(&mut self, src: &'ll Value) -> &'ll Value {
|
|
unsafe {
|
|
llvm::LLVMRustBuildVectorReduceFMax(self.llbuilder, src, /*NoNaNs:*/ false)
|
|
}
|
|
}
|
|
pub fn vector_reduce_fmin_fast(&mut self, src: &'ll Value) -> &'ll Value {
|
|
unsafe {
|
|
let instr =
|
|
llvm::LLVMRustBuildVectorReduceFMin(self.llbuilder, src, /*NoNaNs:*/ true);
|
|
llvm::LLVMRustSetFastMath(instr);
|
|
instr
|
|
}
|
|
}
|
|
pub fn vector_reduce_fmax_fast(&mut self, src: &'ll Value) -> &'ll Value {
|
|
unsafe {
|
|
let instr =
|
|
llvm::LLVMRustBuildVectorReduceFMax(self.llbuilder, src, /*NoNaNs:*/ true);
|
|
llvm::LLVMRustSetFastMath(instr);
|
|
instr
|
|
}
|
|
}
|
|
pub fn vector_reduce_min(&mut self, src: &'ll Value, is_signed: bool) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildVectorReduceMin(self.llbuilder, src, is_signed) }
|
|
}
|
|
pub fn vector_reduce_max(&mut self, src: &'ll Value, is_signed: bool) -> &'ll Value {
|
|
unsafe { llvm::LLVMRustBuildVectorReduceMax(self.llbuilder, src, is_signed) }
|
|
}
|
|
|
|
pub fn add_clause(&mut self, landing_pad: &'ll Value, clause: &'ll Value) {
|
|
unsafe {
|
|
llvm::LLVMAddClause(landing_pad, clause);
|
|
}
|
|
}
|
|
|
|
pub fn catch_ret(&mut self, funclet: &Funclet<'ll>, unwind: &'ll BasicBlock) -> &'ll Value {
|
|
let ret =
|
|
unsafe { llvm::LLVMRustBuildCatchRet(self.llbuilder, funclet.cleanuppad(), unwind) };
|
|
ret.expect("LLVM does not have support for catchret")
|
|
}
|
|
|
|
fn check_store(&mut self, val: &'ll Value, ptr: &'ll Value) -> &'ll Value {
|
|
let dest_ptr_ty = self.cx.val_ty(ptr);
|
|
let stored_ty = self.cx.val_ty(val);
|
|
let stored_ptr_ty = self.cx.type_ptr_to(stored_ty);
|
|
|
|
assert_eq!(self.cx.type_kind(dest_ptr_ty), TypeKind::Pointer);
|
|
|
|
if dest_ptr_ty == stored_ptr_ty {
|
|
ptr
|
|
} else {
|
|
debug!(
|
|
"type mismatch in store. \
|
|
Expected {:?}, got {:?}; inserting bitcast",
|
|
dest_ptr_ty, stored_ptr_ty
|
|
);
|
|
self.bitcast(ptr, stored_ptr_ty)
|
|
}
|
|
}
|
|
|
|
fn check_call<'b>(
|
|
&mut self,
|
|
typ: &str,
|
|
fn_ty: &'ll Type,
|
|
llfn: &'ll Value,
|
|
args: &'b [&'ll Value],
|
|
) -> Cow<'b, [&'ll Value]> {
|
|
assert!(
|
|
self.cx.type_kind(fn_ty) == TypeKind::Function,
|
|
"builder::{} not passed a function, but {:?}",
|
|
typ,
|
|
fn_ty
|
|
);
|
|
|
|
let param_tys = self.cx.func_params_types(fn_ty);
|
|
|
|
let all_args_match = iter::zip(¶m_tys, args.iter().map(|&v| self.val_ty(v)))
|
|
.all(|(expected_ty, actual_ty)| *expected_ty == actual_ty);
|
|
|
|
if all_args_match {
|
|
return Cow::Borrowed(args);
|
|
}
|
|
|
|
let casted_args: Vec<_> = iter::zip(param_tys, args)
|
|
.enumerate()
|
|
.map(|(i, (expected_ty, &actual_val))| {
|
|
let actual_ty = self.val_ty(actual_val);
|
|
if expected_ty != actual_ty {
|
|
debug!(
|
|
"type mismatch in function call of {:?}. \
|
|
Expected {:?} for param {}, got {:?}; injecting bitcast",
|
|
llfn, expected_ty, i, actual_ty
|
|
);
|
|
self.bitcast(actual_val, expected_ty)
|
|
} else {
|
|
actual_val
|
|
}
|
|
})
|
|
.collect();
|
|
|
|
Cow::Owned(casted_args)
|
|
}
|
|
|
|
pub fn va_arg(&mut self, list: &'ll Value, ty: &'ll Type) -> &'ll Value {
|
|
unsafe { llvm::LLVMBuildVAArg(self.llbuilder, list, ty, UNNAMED) }
|
|
}
|
|
|
|
pub(crate) fn call_intrinsic(&mut self, intrinsic: &str, args: &[&'ll Value]) -> &'ll Value {
|
|
let (ty, f) = self.cx.get_intrinsic(intrinsic);
|
|
self.call(ty, f, args, None)
|
|
}
|
|
|
|
fn call_lifetime_intrinsic(&mut self, intrinsic: &str, ptr: &'ll Value, size: Size) {
|
|
let size = size.bytes();
|
|
if size == 0 {
|
|
return;
|
|
}
|
|
|
|
if !self.cx().sess().emit_lifetime_markers() {
|
|
return;
|
|
}
|
|
|
|
let ptr = self.pointercast(ptr, self.cx.type_i8p());
|
|
self.call_intrinsic(intrinsic, &[self.cx.const_u64(size), ptr]);
|
|
}
|
|
|
|
pub(crate) fn phi(
|
|
&mut self,
|
|
ty: &'ll Type,
|
|
vals: &[&'ll Value],
|
|
bbs: &[&'ll BasicBlock],
|
|
) -> &'ll Value {
|
|
assert_eq!(vals.len(), bbs.len());
|
|
let phi = unsafe { llvm::LLVMBuildPhi(self.llbuilder, ty, UNNAMED) };
|
|
unsafe {
|
|
llvm::LLVMAddIncoming(phi, vals.as_ptr(), bbs.as_ptr(), vals.len() as c_uint);
|
|
phi
|
|
}
|
|
}
|
|
|
|
fn add_incoming_to_phi(&mut self, phi: &'ll Value, val: &'ll Value, bb: &'ll BasicBlock) {
|
|
unsafe {
|
|
llvm::LLVMAddIncoming(phi, &val, &bb, 1 as c_uint);
|
|
}
|
|
}
|
|
|
|
fn fptoint_sat(
|
|
&mut self,
|
|
signed: bool,
|
|
val: &'ll Value,
|
|
dest_ty: &'ll Type,
|
|
) -> Option<&'ll Value> {
|
|
let src_ty = self.cx.val_ty(val);
|
|
let (float_ty, int_ty, vector_length) = if self.cx.type_kind(src_ty) == TypeKind::Vector {
|
|
assert_eq!(self.cx.vector_length(src_ty), self.cx.vector_length(dest_ty));
|
|
(
|
|
self.cx.element_type(src_ty),
|
|
self.cx.element_type(dest_ty),
|
|
Some(self.cx.vector_length(src_ty)),
|
|
)
|
|
} else {
|
|
(src_ty, dest_ty, None)
|
|
};
|
|
let float_width = self.cx.float_width(float_ty);
|
|
let int_width = self.cx.int_width(int_ty);
|
|
|
|
let instr = if signed { "fptosi" } else { "fptoui" };
|
|
let name = if let Some(vector_length) = vector_length {
|
|
format!(
|
|
"llvm.{}.sat.v{}i{}.v{}f{}",
|
|
instr, vector_length, int_width, vector_length, float_width
|
|
)
|
|
} else {
|
|
format!("llvm.{}.sat.i{}.f{}", instr, int_width, float_width)
|
|
};
|
|
let f = self.declare_cfn(&name, llvm::UnnamedAddr::No, self.type_func(&[src_ty], dest_ty));
|
|
Some(self.call(self.type_func(&[src_ty], dest_ty), f, &[val], None))
|
|
}
|
|
|
|
pub(crate) fn landing_pad(
|
|
&mut self,
|
|
ty: &'ll Type,
|
|
pers_fn: &'ll Value,
|
|
num_clauses: usize,
|
|
) -> &'ll Value {
|
|
// Use LLVMSetPersonalityFn to set the personality. It supports arbitrary Consts while,
|
|
// LLVMBuildLandingPad requires the argument to be a Function (as of LLVM 12). The
|
|
// personality lives on the parent function anyway.
|
|
self.set_personality_fn(pers_fn);
|
|
unsafe {
|
|
llvm::LLVMBuildLandingPad(self.llbuilder, ty, None, num_clauses as c_uint, UNNAMED)
|
|
}
|
|
}
|
|
}
|