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author | bors <bors@rust-lang.org> | 2023-03-23 18:43:04 +0000 |
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committer | bors <bors@rust-lang.org> | 2023-03-23 18:43:04 +0000 |
commit | e2163008763c326ec4003e07b8e6eef0c98f6204 (patch) | |
tree | 13526f6f563f37d8998736ea3ab7769358cfea93 /compiler/rustc_codegen_cranelift | |
parent | df7fd9995f10627f25ccb325f693a11b3395a73c (diff) | |
parent | 64cce5fc7d2c1070adeaa719932b4bbccf27dd46 (diff) | |
download | rust-e2163008763c326ec4003e07b8e6eef0c98f6204.tar.gz |
Auto merge of #108442 - scottmcm:mir-transmute, r=oli-obk
Add `CastKind::Transmute` to MIR
~~Nothing actually produces it in this commit, so I don't know how to test it, but it also means it shouldn't be possible for it to break anything.~~
Includes lowering `transmute` calls to it, so it's used.
Zulip Conversation: <https://rust-lang.zulipchat.com/#narrow/stream/189540-t-compiler.2Fwg-mir-opt/topic/Good.20first.20isssue/near/321849610>
Diffstat (limited to 'compiler/rustc_codegen_cranelift')
-rw-r--r-- | compiler/rustc_codegen_cranelift/src/base.rs | 4 | ||||
-rw-r--r-- | compiler/rustc_codegen_cranelift/src/intrinsics/mod.rs | 10 |
2 files changed, 4 insertions, 10 deletions
diff --git a/compiler/rustc_codegen_cranelift/src/base.rs b/compiler/rustc_codegen_cranelift/src/base.rs index 1b8e9312e2f..2107ae147e9 100644 --- a/compiler/rustc_codegen_cranelift/src/base.rs +++ b/compiler/rustc_codegen_cranelift/src/base.rs @@ -709,6 +709,10 @@ fn codegen_stmt<'tcx>( let operand = codegen_operand(fx, operand); operand.coerce_dyn_star(fx, lval); } + Rvalue::Cast(CastKind::Transmute, ref operand, _to_ty) => { + let operand = codegen_operand(fx, operand); + lval.write_cvalue_transmute(fx, operand); + } Rvalue::Discriminant(place) => { let place = codegen_place(fx, place); let value = place.to_cvalue(fx); diff --git a/compiler/rustc_codegen_cranelift/src/intrinsics/mod.rs b/compiler/rustc_codegen_cranelift/src/intrinsics/mod.rs index fe48cac4faf..03f2a65fcca 100644 --- a/compiler/rustc_codegen_cranelift/src/intrinsics/mod.rs +++ b/compiler/rustc_codegen_cranelift/src/intrinsics/mod.rs @@ -557,16 +557,6 @@ fn codegen_regular_intrinsic_call<'tcx>( fx.bcx.ins().band(ptr, mask); } - sym::transmute => { - intrinsic_args!(fx, args => (from); intrinsic); - - if ret.layout().abi.is_uninhabited() { - crate::base::codegen_panic(fx, "Transmuting to uninhabited type.", source_info); - return; - } - - ret.write_cvalue_transmute(fx, from); - } sym::write_bytes | sym::volatile_set_memory => { intrinsic_args!(fx, args => (dst, val, count); intrinsic); let val = val.load_scalar(fx); |