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b6ac451381
Over the entire test-suite, this has an insignificantly negative average performance impact, but reduces some of the worst slowdowns from the anti-dep. change (r158294). Largest speedups: SingleSource/Benchmarks/Stanford/Quicksort - 28% SingleSource/Benchmarks/Stanford/Towers - 24% SingleSource/Benchmarks/Shootout-C++/matrix - 23% MultiSource/Benchmarks/SciMark2-C/scimark2 - 19% MultiSource/Benchmarks/MiBench/automotive-bitcount/automotive-bitcount - 15% (matrix and automotive-bitcount were both in the top-5 slowdown list from the anti-dep. change) Largest slowdowns: MultiSource/Benchmarks/McCat/03-testtrie/testtrie - 28% MultiSource/Benchmarks/mediabench/gsm/toast/toast - 26% MultiSource/Benchmarks/MiBench/automotive-susan/automotive-susan - 21% SingleSource/Benchmarks/CoyoteBench/lpbench - 20% MultiSource/Applications/d/make_dparser - 16% llvm-svn: 158296
26 lines
1.1 KiB
LLVM
26 lines
1.1 KiB
LLVM
; RUN: llc < %s -march=ppc32 -mtriple=powerpc-apple-darwin10 -mcpu=g5 -disable-ppc-ilp-pref | FileCheck %s
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; ModuleID = '<stdin>'
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target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f128:64:128"
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target triple = "powerpc-apple-darwin10.0"
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; It is wrong on powerpc to substitute reg+reg for $0; the stw opcode
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; would have to change.
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@x = external global [0 x i32] ; <[0 x i32]*> [#uses=1]
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define void @foo(i32 %y) nounwind ssp {
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entry:
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; CHECK: foo
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; CHECK: add r3
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; CHECK: 0(r3)
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%y_addr = alloca i32 ; <i32*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store i32 %y, i32* %y_addr
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%0 = load i32* %y_addr, align 4 ; <i32> [#uses=1]
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%1 = getelementptr inbounds [0 x i32]* @x, i32 0, i32 %0 ; <i32*> [#uses=1]
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call void asm sideeffect "isync\0A\09eieio\0A\09stw $1, $0", "=*o,r,~{memory}"(i32* %1, i32 0) nounwind
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br label %return
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return: ; preds = %entry
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ret void
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}
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