bjoernager/rust
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Lower BinOp::Cmp to llvm.{s,u}cmp.* intrinsics

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Lowers `mir::BinOp::Cmp` (`three_way_compare` intrinsic) to the corresponding
LLVM `llvm.{s,u}cmp.i8.*` intrinsics, added in LLVM 19.
This commit is contained in:
DaniPopes 2024-12-06 23:16:06 +01:00
parent 002da76821
commit 58c10c66c1
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GPG key ID: 0F09640DDB7AC692
8 changed files with 124 additions and 42 deletions
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12
compiler/rustc_codegen_llvm/src/context.rs
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@ -1108,6 +1108,18 @@ impl<'ll> CodegenCx<'ll, '_> {
ifn!("llvm.usub.sat.i64", fn(t_i64, t_i64) -> t_i64);
ifn!("llvm.usub.sat.i128", fn(t_i128, t_i128) -> t_i128);
ifn!("llvm.scmp.i8.i8", fn(t_i8, t_i8) -> t_i8);
ifn!("llvm.scmp.i8.i16", fn(t_i16, t_i16) -> t_i8);
ifn!("llvm.scmp.i8.i32", fn(t_i32, t_i32) -> t_i8);
ifn!("llvm.scmp.i8.i64", fn(t_i64, t_i64) -> t_i8);
ifn!("llvm.scmp.i8.i128", fn(t_i128, t_i128) -> t_i8);
ifn!("llvm.ucmp.i8.i8", fn(t_i8, t_i8) -> t_i8);
ifn!("llvm.ucmp.i8.i16", fn(t_i16, t_i16) -> t_i8);
ifn!("llvm.ucmp.i8.i32", fn(t_i32, t_i32) -> t_i8);
ifn!("llvm.ucmp.i8.i64", fn(t_i64, t_i64) -> t_i8);
ifn!("llvm.ucmp.i8.i128", fn(t_i128, t_i128) -> t_i8);
ifn!("llvm.lifetime.start.p0i8", fn(t_i64, ptr) -> void);
ifn!("llvm.lifetime.end.p0i8", fn(t_i64, ptr) -> void);