forked from OSchip/llvm-project
30 lines
1.4 KiB
LLVM
30 lines
1.4 KiB
LLVM
; RUN: opt -memcpyopt -S < %s | FileCheck %s
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; RUN: opt -passes=memcpyopt -S < %s | FileCheck %s
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; rdar://8875553
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; Memcpyopt shouldn't optimize the second memcpy using the first
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; because the first has a smaller size.
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; CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %tmp, i8* align 4 getelementptr inbounds (%struct.s, %struct.s* @cell, i32 0, i32 0, i32 0), i32 16, i1 false)
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target datalayout = "e-p:32:32:32"
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%struct.s = type { [11 x i8], i32 }
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@.str = private constant [11 x i8] c"0123456789\00"
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@cell = external global %struct.s
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declare void @check(%struct.s* byval %p) nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind
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define void @foo() nounwind {
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entry:
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%agg.tmp = alloca %struct.s, align 4
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store i32 99, i32* getelementptr inbounds (%struct.s, %struct.s* @cell, i32 0, i32 1), align 4
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 getelementptr inbounds (%struct.s, %struct.s* @cell, i32 0, i32 0, i32 0), i8* align 1 getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i32 0, i32 0), i32 11, i1 false)
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%tmp = getelementptr inbounds %struct.s, %struct.s* %agg.tmp, i32 0, i32 0, i32 0
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %tmp, i8* align 4 getelementptr inbounds (%struct.s, %struct.s* @cell, i32 0, i32 0, i32 0), i32 16, i1 false)
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call void @check(%struct.s* byval %agg.tmp)
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ret void
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}
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