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ba1cc33676
allowing the memcpy to be eliminated. Unfortunately, the requirements on byval's without explicit alignment are really weak and impossible to predict in the mid-level optimizer, so this doesn't kick in much with current frontends. The fix is to change clang to set alignment on all byval arguments. llvm-svn: 119916
29 lines
1.7 KiB
LLVM
29 lines
1.7 KiB
LLVM
; RUN: opt < %s -basicaa -memcpyopt -S | not grep {call.*memcpy}
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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-f80:128:128"
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target triple = "i686-apple-darwin9"
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define void @ccosl({ x86_fp80, x86_fp80 }* noalias sret %agg.result, { x86_fp80, x86_fp80 }* byval align 8 %z) nounwind {
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entry:
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%iz = alloca { x86_fp80, x86_fp80 } ; <{ x86_fp80, x86_fp80 }*> [#uses=3]
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%memtmp = alloca { x86_fp80, x86_fp80 }, align 16 ; <{ x86_fp80, x86_fp80 }*> [#uses=2]
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%tmp1 = getelementptr { x86_fp80, x86_fp80 }* %z, i32 0, i32 1 ; <x86_fp80*> [#uses=1]
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%tmp2 = load x86_fp80* %tmp1, align 16 ; <x86_fp80> [#uses=1]
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%tmp3 = fsub x86_fp80 0xK80000000000000000000, %tmp2 ; <x86_fp80> [#uses=1]
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%tmp4 = getelementptr { x86_fp80, x86_fp80 }* %iz, i32 0, i32 1 ; <x86_fp80*> [#uses=1]
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%real = getelementptr { x86_fp80, x86_fp80 }* %iz, i32 0, i32 0 ; <x86_fp80*> [#uses=1]
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%tmp7 = getelementptr { x86_fp80, x86_fp80 }* %z, i32 0, i32 0 ; <x86_fp80*> [#uses=1]
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%tmp8 = load x86_fp80* %tmp7, align 16 ; <x86_fp80> [#uses=1]
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store x86_fp80 %tmp3, x86_fp80* %real, align 16
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store x86_fp80 %tmp8, x86_fp80* %tmp4, align 16
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call void @ccoshl( { x86_fp80, x86_fp80 }* noalias sret %memtmp, { x86_fp80, x86_fp80 }* byval align 8 %iz ) nounwind
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%memtmp14 = bitcast { x86_fp80, x86_fp80 }* %memtmp to i8* ; <i8*> [#uses=1]
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%agg.result15 = bitcast { x86_fp80, x86_fp80 }* %agg.result to i8* ; <i8*> [#uses=1]
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call void @llvm.memcpy.i32( i8* %agg.result15, i8* %memtmp14, i32 32, i32 16 )
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ret void
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}
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declare void @ccoshl({ x86_fp80, x86_fp80 }* noalias sret , { x86_fp80, x86_fp80 }* byval ) nounwind
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declare void @llvm.memcpy.i32(i8*, i8*, i32, i32) nounwind
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