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Support ctr and lr as clobber-only registers in PowerPC inline assembly

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This commit is contained in:
Taiki Endo
2025-09-21 13:48:22 +09:00
parent dd7fda5700
commit f4b876867d
12 changed files with 572 additions and 189 deletions
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16
compiler/rustc_codegen_gcc/src/asm.rs
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@@ -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(),