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| author | Stuart Cook <Zalathar@users.noreply.github.com> | 2025-09-22 20:25:14 +1000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-09-22 20:25:14 +1000 |
| commit | 46be365a602495076171adeb603a682079e6c2eb (patch) | |
| tree | 1b92dea815f2ba43a865a0a4e6d73634a492feca /compiler/rustc_codegen_gcc/src | |
| parent | 40db498a0f0291dde25380adda38cce29e4668cd (diff) | |
| parent | f4b876867d609404be8a78220c0d5117303bb0f8 (diff) | |
| download | rust-46be365a602495076171adeb603a682079e6c2eb.tar.gz rust-46be365a602495076171adeb603a682079e6c2eb.zip | |
Rollup merge of #146831 - taiki-e:powerpc-clobber, r=Amanieu
Support ctr and lr as clobber-only registers in PowerPC inline assembly Follow-up to rust-lang/rust#131341. CTR and LR are marked as volatile in all ABIs, but I skipped them in rust-lang/rust#131341 due to they are currently marked as reserved. https://github.com/rust-lang/rust/blob/dd7fda570040e8a736f7d8bc28ddd1b444aabc82/compiler/rustc_target/src/asm/powerpc.rs#L209-L212 However, they are actually only unusable as input/output of inline assembly, and should be fine to support as clobber-only registers as discussed in [#t-compiler > ppc/ppc64 inline asm support](https://rust-lang.zulipchat.com/#narrow/channel/131828-t-compiler/topic/ppc.2Fppc64.20inline.20asm.20support/with/540413845). r? ````@Amanieu```` or ````@workingjubilee```` cc ````@programmerjake```` ````@rustbot```` label +O-PowerPC +A-inline-assembly
Diffstat (limited to 'compiler/rustc_codegen_gcc/src')
| -rw-r--r-- | compiler/rustc_codegen_gcc/src/asm.rs | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/compiler/rustc_codegen_gcc/src/asm.rs b/compiler/rustc_codegen_gcc/src/asm.rs index 17e2e028b16..a14881c502c 100644 --- a/compiler/rustc_codegen_gcc/src/asm.rs +++ b/compiler/rustc_codegen_gcc/src/asm.rs @@ -698,8 +698,12 @@ fn reg_class_to_gcc(reg_class: InlineAsmRegClass) -> &'static str { InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::reg_nonzero) => "b", InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::freg) => "f", InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::vreg) => "v", - InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::cr) - | InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::xer) => { + InlineAsmRegClass::PowerPC( + PowerPCInlineAsmRegClass::cr + | PowerPCInlineAsmRegClass::ctr + | PowerPCInlineAsmRegClass::lr + | PowerPCInlineAsmRegClass::xer, + ) => { unreachable!("clobber-only") } InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::reg) => "r", @@ -777,8 +781,12 @@ fn dummy_output_type<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, reg: InlineAsmRegCl InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::vreg) => { cx.type_vector(cx.type_i32(), 4) } - InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::cr) - | InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::xer) => { + InlineAsmRegClass::PowerPC( + PowerPCInlineAsmRegClass::cr + | PowerPCInlineAsmRegClass::ctr + | PowerPCInlineAsmRegClass::lr + | PowerPCInlineAsmRegClass::xer, + ) => { unreachable!("clobber-only") } InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::reg) => cx.type_i32(), |