bjoernager/rust
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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
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@ -785,8 +785,10 @@ fn codegen_stmt<'tcx>(
}
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 codegen_stmt<'tcx>(
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,