llvm.org GIT mirror llvm / cb18ca2
line endings git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152832 91177308-0d34-0410-b5e6-96231b3b80d8 Matt Beaumont-Gay 7 years ago
1 changed file(s) with 20 addition(s) and 20 deletion(s). Raw diff Collapse all Expand all
None ; PR12202
1 ; RUN: opt < %s -scalarrepl -S
2 ; Ensure that we do not hang or crash when feeding a negative value to memset
3
4 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"
5 target triple = "i686-pc-win32"
6
7 define i32 @test() nounwind {
8 entry:
9 %retval = alloca i32, align 4
10 %buff = alloca [1 x i8], align 1
11 store i32 0, i32* %retval
12 %0 = bitcast [1 x i8]* %buff to i8*
13 call void @llvm.memset.p0i8.i32(i8* %0, i8 0, i32 1, i32 1, i1 false)
14 %arraydecay = getelementptr inbounds [1 x i8]* %buff, i32 0, i32 0
15 call void @llvm.memset.p0i8.i32(i8* %arraydecay, i8 -1, i32 -8, i32 1, i1 false) ; Negative 8!
16 ret i32 0
17 }
18
19 declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
0 ; PR12202
1 ; RUN: opt < %s -scalarrepl -S
2 ; Ensure that we do not hang or crash when feeding a negative value to memset
3
4 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"
5 target triple = "i686-pc-win32"
6
7 define i32 @test() nounwind {
8 entry:
9 %retval = alloca i32, align 4
10 %buff = alloca [1 x i8], align 1
11 store i32 0, i32* %retval
12 %0 = bitcast [1 x i8]* %buff to i8*
13 call void @llvm.memset.p0i8.i32(i8* %0, i8 0, i32 1, i32 1, i1 false)
14 %arraydecay = getelementptr inbounds [1 x i8]* %buff, i32 0, i32 0
15 call void @llvm.memset.p0i8.i32(i8* %arraydecay, i8 -1, i32 -8, i32 1, i1 false) ; Negative 8!
16 ret i32 0
17 }
18
19 declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind