[llvm-branch-commits] [clang] [llvm] [SPARC] Prefer RDPC over CALL to implement GETPCX for 64-bit target (PR #77196)
Sergei Barannikov via llvm-branch-commits
llvm-branch-commits at lists.llvm.org
Fri Jan 12 21:22:51 PST 2024
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@@ -234,8 +244,15 @@ void SparcAsmPrinter::LowerGETPCXAndEmitMCInsts(const MachineInstr *MI,
// add <MO>, %o7, <MO>
OutStreamer->emitLabel(StartLabel);
- MCOperand Callee = createPCXCallOP(EndLabel, OutContext);
- EmitCall(*OutStreamer, Callee, STI);
+ if (!STI.getTargetTriple().isSPARC64() ||
+ STI.hasFeature(Sparc::TuneSlowRDPC)) {
+ MCOperand Callee = createPCXCallOP(EndLabel, OutContext);
+ EmitCall(*OutStreamer, Callee, STI);
+ } else {
+ // TODO make it possible to store PC in other registers
+ // so that leaf function optimization becomes possible.
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s-barannikov wrote:
Let's do it separately then.
https://github.com/llvm/llvm-project/pull/77196
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