eb7d16ea25
mflr is kind of expensive on Power version smaller than 10, so we should schedule the store for the mflr's def away from mflr. In epilogue, the expensive mtlr has no user for its def, so it doesn't matter that the load and the mtlr are back-to-back. Reviewed By: RolandF Differential Revision: https://reviews.llvm.org/D137423
25 lines
567 B
LLVM
25 lines
567 B
LLVM
; RUN: llc -verify-machineinstrs -mcpu=pwr7 < %s | FileCheck %s
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target datalayout = "E-m:e-i64:64-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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; Function Attrs: nounwind readnone
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define ptr @test1() #0 {
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entry:
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%0 = tail call ptr @llvm.returnaddress(i32 0)
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ret ptr %0
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}
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; CHECK-LABEL: @test1
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; CHECK: mflr {{[0-9]+}}
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; CHECK: std 0, 64(1)
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; CHECK-DAG: ld 3, 64(1)
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; CHECK-DAG: ld [[SR:[0-9]+]], 16(1)
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; CHECK: mtlr [[SR]]
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; CHECK: blr
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; Function Attrs: nounwind readnone
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declare ptr @llvm.returnaddress(i32) #0
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attributes #0 = { nounwind readnone }
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