93 lines
3.7 KiB
Rust
93 lines
3.7 KiB
Rust
// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use rustc::mir;
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use asm;
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use builder::Builder;
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use super::FunctionCx;
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use super::LocalRef;
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impl FunctionCx<'a, 'll, 'tcx> {
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pub fn codegen_statement(&mut self,
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bx: Builder<'a, 'll, 'tcx>,
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statement: &mir::Statement<'tcx>)
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-> Builder<'a, 'll, 'tcx> {
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debug!("codegen_statement(statement={:?})", statement);
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self.set_debug_loc(&bx, statement.source_info);
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match statement.kind {
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mir::StatementKind::Assign(ref place, ref rvalue) => {
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if let mir::Place::Local(index) = *place {
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match self.locals[index] {
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LocalRef::Place(cg_dest) => {
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self.codegen_rvalue(bx, cg_dest, rvalue)
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}
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LocalRef::Operand(None) => {
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let (bx, operand) = self.codegen_rvalue_operand(bx, rvalue);
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self.locals[index] = LocalRef::Operand(Some(operand));
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bx
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}
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LocalRef::Operand(Some(op)) => {
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if !op.layout.is_zst() {
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span_bug!(statement.source_info.span,
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"operand {:?} already assigned",
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rvalue);
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}
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// If the type is zero-sized, it's already been set here,
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// but we still need to make sure we codegen the operand
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self.codegen_rvalue_operand(bx, rvalue).0
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}
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}
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} else {
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let cg_dest = self.codegen_place(&bx, place);
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self.codegen_rvalue(bx, cg_dest, rvalue)
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}
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}
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mir::StatementKind::SetDiscriminant{ref place, variant_index} => {
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self.codegen_place(&bx, place)
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.codegen_set_discr(&bx, variant_index);
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bx
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}
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mir::StatementKind::StorageLive(local) => {
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if let LocalRef::Place(cg_place) = self.locals[local] {
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cg_place.storage_live(&bx);
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}
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bx
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}
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mir::StatementKind::StorageDead(local) => {
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if let LocalRef::Place(cg_place) = self.locals[local] {
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cg_place.storage_dead(&bx);
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}
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bx
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}
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mir::StatementKind::InlineAsm { ref asm, ref outputs, ref inputs } => {
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let outputs = outputs.iter().map(|output| {
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self.codegen_place(&bx, output)
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}).collect();
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let input_vals = inputs.iter().map(|input| {
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self.codegen_operand(&bx, input).immediate()
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}).collect();
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asm::codegen_inline_asm(&bx, asm, outputs, input_vals);
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bx
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}
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mir::StatementKind::ReadForMatch(_) |
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mir::StatementKind::EndRegion(_) |
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mir::StatementKind::Validate(..) |
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mir::StatementKind::UserAssertTy(..) |
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mir::StatementKind::Nop => bx,
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}
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}
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}
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