2012-03-16 04:24:29 +08:00
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; PR12202
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; RUN: opt < %s -scalarrepl -S
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; Ensure that we do not hang or crash when feeding a negative value to memset
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f80:128:128-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S32"
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target triple = "i686-pc-win32"
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define i32 @test() nounwind {
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entry:
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%retval = alloca i32, align 4
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%buff = alloca [1 x i8], align 1
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store i32 0, i32* %retval
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%0 = bitcast [1 x i8]* %buff to i8*
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call void @llvm.memset.p0i8.i32(i8* %0, i8 0, i32 1, i32 1, i1 false)
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%arraydecay = getelementptr inbounds [1 x i8]* %buff, i32 0, i32 0
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call void @llvm.memset.p0i8.i32(i8* %arraydecay, i8 -1, i32 -8, i32 1, i1 false) ; Negative 8!
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ret i32 0
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}
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declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
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