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cddd83b2d6
When a function contains something, such as inline asm, which explicitly clobbers the register used as the frame pointer, don't spill it twice. If we need a frame pointer, it will be saved/restored in the prologue/epilogue code. Explicitly spilling it again will reuse the same spill slot used by the prologue/epilogue code, thus clobbering the saved value. The same applies to the base-pointer or PIC-base register. Partially fixes PR26856. Thanks to Ulrich for his analysis and the small inline-asm reproducer. llvm-svn: 280188
27 lines
586 B
LLVM
27 lines
586 B
LLVM
; RUN: llc < %s | FileCheck %s
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target datalayout = "E-m:e-i64:64-n32:64"
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target triple = "powerpc64"
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; Function Attrs: nounwind
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define void @test() #0 {
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entry:
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call void @func()
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call void asm sideeffect "nop", "~{r31}"() #1, !srcloc !0
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ret void
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; CHECK-LABEL: @test
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; CHECK: std 31, -8(1)
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; CHECK: stdu 1, -{{[0-9]+}}(1)
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; CHECK-NOT: std 31,
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; CHECK: bl func
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; CHECK: ld 31, -8(1)
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; CHECK: blr
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}
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declare void @func()
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attributes #0 = { nounwind "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "target-cpu"="ppc64" }
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attributes #1 = { nounwind }
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!0 = !{i32 57}
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