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Add a test case for SROA where the store size is bigger than slice size. The

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test case was fixed in r216248.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216303 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Yunzhong Gao 2014-08-22 23:27:04 +00:00
parent 03d2823e02
commit 9fe92725af
1 changed files with 34 additions and 0 deletions
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34
test/Transforms/SROA/slice-width.ll
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@ -70,3 +70,37 @@ define void @memset_fp80_padding() {
; CHECK: alloca x86_fp80
; CHECK: call void @llvm.memset.p0i8.i32(i8* %{{.*}}, i8 -1, i32 16, i32 16, i1 false)
; CHECK: store i64 -1, i64* @i64_sink
%S.vec3float = type { float, float, float }
%U.vec3float = type { <4 x float> }
declare i32 @memcpy_vec3float_helper(%S.vec3float*)
define i32 @memcpy_vec3float_widening(%S.vec3float* %x) {
; CHECK-LABEL: @memcpy_vec3float_widening(
; PR18726: Check that SROA does not rewrite a 12-byte memcpy into a 16-byte
; vector store, hence accidentally putting gibberish onto the stack.
entry:
; Create a temporary variable %tmp1 and copy %x[0] into it
%tmp1 = alloca %S.vec3float, align 4
%0 = bitcast %S.vec3float* %tmp1 to i8*
%1 = bitcast %S.vec3float* %x to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %0, i8* %1, i32 12, i32 4, i1 false)
; The following block does nothing; but appears to confuse SROA
%unused1 = bitcast %S.vec3float* %tmp1 to %U.vec3float*
%unused2 = getelementptr inbounds %U.vec3float* %unused1, i32 0, i32 0
%unused3 = load <4 x float>* %unused2, align 1
; Create a second temporary and copy %tmp1 into it
%tmp2 = alloca %S.vec3float, align 4
%2 = bitcast %S.vec3float* %tmp2 to i8*
%3 = bitcast %S.vec3float* %tmp1 to i8*
; CHECK: alloca
; CHECK-NOT: store <4 x float>
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %2, i8* %3, i32 12, i32 4, i1 false)
%result = call i32 @memcpy_vec3float_helper(%S.vec3float* %tmp2)
ret i32 %result
; CHECK: ret i32 %result
}