bjoernager/rust
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Stop implementing _with_overflow intrinsics in codegen backends.

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This commit is contained in:
Camille GILLOT 2023-02-18 22:06:29 +00:00
parent 7e795bdf03
commit 9f6c1df872
3 changed files with 0 additions and 50 deletions
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25
compiler/rustc_codegen_ssa/src/mir/intrinsic.rs
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@ -218,9 +218,6 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
args[1].val.unaligned_volatile_store(bx, dst);
return;
}
sym::add_with_overflow
| sym::sub_with_overflow
| sym::mul_with_overflow
| sym::unchecked_div
| sym::unchecked_rem
| sym::unchecked_shl
@ -232,28 +229,6 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
let ty = arg_tys[0];
match int_type_width_signed(ty, bx.tcx()) {
Some((_width, signed)) => match name {
sym::add_with_overflow
| sym::sub_with_overflow
| sym::mul_with_overflow => {
let op = match name {
sym::add_with_overflow => OverflowOp::Add,
sym::sub_with_overflow => OverflowOp::Sub,
sym::mul_with_overflow => OverflowOp::Mul,
_ => bug!(),
};
let (val, overflow) =
bx.checked_binop(op, ty, args[0].immediate(), args[1].immediate());
// Convert `i1` to a `bool`, and write it to the out parameter
let val = bx.from_immediate(val);
let overflow = bx.from_immediate(overflow);
let dest = result.project_field(bx, 0);
bx.store(val, dest.llval, dest.align);
let dest = result.project_field(bx, 1);
bx.store(overflow, dest.llval, dest.align);
return;
}
sym::exact_div => {
if signed {
bx.exactsdiv(args[0].immediate(), args[1].immediate())