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Do not unnecessarily eval consts in codegen

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This commit is contained in:
Michael Goulet 2024-09-20 20:38:11 -04:00
parent da889684c8
commit 914193c8f4
8 changed files with 30 additions and 19 deletions
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11
compiler/rustc_codegen_cranelift/src/base.rs
View File

@ -785,8 +785,10 @@ fn is_fat_ptr<'tcx>(fx: &FunctionCx<'_, '_, 'tcx>, ty: Ty<'tcx>) -> bool {
}
Rvalue::Repeat(ref operand, times) => {
let operand = codegen_operand(fx, operand);
let times =
fx.monomorphize(times).eval_target_usize(fx.tcx, ParamEnv::reveal_all());
let times = fx
.monomorphize(times)
.try_to_target_usize(fx.tcx)
.expect("expected monomorphic const in codegen");
if operand.layout().size.bytes() == 0 {
// Do nothing for ZST's
} else if fx.clif_type(operand.layout().ty) == Some(types::I8) {
@ -944,7 +946,10 @@ fn is_fat_ptr<'tcx>(fx: &FunctionCx<'_, '_, 'tcx>, ty: Ty<'tcx>) -> bool {
fn codegen_array_len<'tcx>(fx: &mut FunctionCx<'_, '_, 'tcx>, place: CPlace<'tcx>) -> Value {
match *place.layout().ty.kind() {
ty::Array(_elem_ty, len) => {
let len = fx.monomorphize(len).eval_target_usize(fx.tcx, ParamEnv::reveal_all()) as i64;
let len = fx
.monomorphize(len)
.try_to_target_usize(fx.tcx)
.expect("expected monomorphic const in codegen") as i64;
fx.bcx.ins().iconst(fx.pointer_type, len)
}
ty::Slice(_elem_ty) => place.to_ptr_unsized().1,

2
compiler/rustc_codegen_cranelift/src/debuginfo/types.rs
View File

@ -44,7 +44,7 @@ pub(crate) fn debug_type<'tcx>(
type_dbg,
ty,
*elem_ty,
len.eval_target_usize(tcx, ty::ParamEnv::reveal_all()),
len.try_to_target_usize(tcx).expect("expected monomorphic const in codegen"),
),
// ty::Slice(_) | ty::Str
// ty::Dynamic

5
compiler/rustc_codegen_cranelift/src/intrinsics/simd.rs
View File

@ -131,9 +131,8 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
let idx = generic_args[2]
.expect_const()
.eval(fx.tcx, ty::ParamEnv::reveal_all(), span)
.unwrap()
.1
.try_to_valtree()
.expect("expected monomorphic const in codegen")
.unwrap_branch();
assert_eq!(x.layout(), y.layout());

8
compiler/rustc_codegen_cranelift/src/unsize.rs
View File

@ -24,10 +24,10 @@ pub(crate) fn unsized_info<'tcx>(
let (source, target) =
fx.tcx.struct_lockstep_tails_for_codegen(source, target, ParamEnv::reveal_all());
match (&source.kind(), &target.kind()) {
(&ty::Array(_, len), &ty::Slice(_)) => fx
.bcx
.ins()
.iconst(fx.pointer_type, len.eval_target_usize(fx.tcx, ParamEnv::reveal_all()) as i64),
(&ty::Array(_, len), &ty::Slice(_)) => fx.bcx.ins().iconst(
fx.pointer_type,
len.try_to_target_usize(fx.tcx).expect("expected monomorphic const in codegen") as i64,
),
(&ty::Dynamic(data_a, _, src_dyn_kind), &ty::Dynamic(data_b, _, target_dyn_kind))
if src_dyn_kind == target_dyn_kind =>
{

4
compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs
View File

@ -125,7 +125,9 @@ fn build_fixed_size_array_di_node<'ll, 'tcx>(
let (size, align) = cx.size_and_align_of(array_type);
let upper_bound = len.eval_target_usize(cx.tcx, ty::ParamEnv::reveal_all()) as c_longlong;
let upper_bound = len
.try_to_target_usize(cx.tcx)
.expect("expected monomorphic const in codegen") as c_longlong;
let subrange =
unsafe { Some(llvm::LLVMRustDIBuilderGetOrCreateSubrange(DIB(cx), 0, upper_bound)) };

6
compiler/rustc_codegen_ssa/src/base.rs
View File

@ -115,9 +115,9 @@ fn unsized_info<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
let (source, target) =
cx.tcx().struct_lockstep_tails_for_codegen(source, target, bx.param_env());
match (source.kind(), target.kind()) {
(&ty::Array(_, len), &ty::Slice(_)) => {
cx.const_usize(len.eval_target_usize(cx.tcx(), ty::ParamEnv::reveal_all()))
}
(&ty::Array(_, len), &ty::Slice(_)) => cx.const_usize(
len.try_to_target_usize(cx.tcx()).expect("expected monomorphic const in codegen"),
),
(&ty::Dynamic(data_a, _, src_dyn_kind), &ty::Dynamic(data_b, _, target_dyn_kind))
if src_dyn_kind == target_dyn_kind =>
{

6
compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
View File

@ -188,7 +188,8 @@ fn push_debuginfo_type_name<'tcx>(
_ => write!(
output,
",{}>",
len.eval_target_usize(tcx, ty::ParamEnv::reveal_all())
len.try_to_target_usize(tcx)
.expect("expected monomorphic const in codegen")
)
.unwrap(),
}
@ -200,7 +201,8 @@ fn push_debuginfo_type_name<'tcx>(
_ => write!(
output,
"; {}]",
len.eval_target_usize(tcx, ty::ParamEnv::reveal_all())
len.try_to_target_usize(tcx)
.expect("expected monomorphic const in codegen")
)
.unwrap(),
}

7
compiler/rustc_codegen_ssa/src/mir/rvalue.rs
View File

@ -114,7 +114,8 @@ pub(crate) fn codegen_rvalue(
let count = self
.monomorphize(count)
.eval_target_usize(bx.cx().tcx(), ty::ParamEnv::reveal_all());
.try_to_target_usize(bx.tcx())
.expect("expected monomorphic const in codegen");
bx.write_operand_repeatedly(cg_elem, count, dest);
}
@ -803,7 +804,9 @@ fn evaluate_array_len(&mut self, bx: &mut Bx, place: mir::Place<'tcx>) -> Bx::Va
if let Some(index) = place.as_local() {
if let LocalRef::Operand(op) = self.locals[index] {
if let ty::Array(_, n) = op.layout.ty.kind() {
let n = n.eval_target_usize(bx.cx().tcx(), ty::ParamEnv::reveal_all());
let n = n
.try_to_target_usize(bx.tcx())
.expect("expected monomorphic const in codegen");
return bx.cx().const_usize(n);
}
}