Testcase for PR1421

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37357 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/ScalarRepl/2007-05-29-MemcpyPreserve.ll b/test/Transforms/ScalarRepl/2007-05-29-MemcpyPreserve.ll
new file mode 100644 (file)
index 0000000..dc1198e
--- /dev/null
+++ b/test/Transforms/ScalarRepl/2007-05-29-MemcpyPreserve.ll
@@ -0,0 +1,23 @@
+; RUN: llvm-as < %s | opt -scalarrepl | llvm-dis | grep memcpy
+; PR1421
+
+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"
+target triple = "i686-apple-darwin8"
+       %struct.LongestMember = type { i8, i32 }
+       %struct.MyString = type { i32 }
+       %struct.UnionType = type { %struct.LongestMember }
+
+define void @_Z4testP9UnionTypePS0_(%struct.UnionType* %p, %struct.UnionType** %pointerToUnion) {
+entry:
+       %tmp = alloca %struct.UnionType, align 8                ; <%struct.UnionType*> [#uses=2]
+       %tmp2 = getelementptr %struct.UnionType* %tmp, i32 0, i32 0, i32 0              ; <i8*> [#uses=1]
+       %tmp13 = getelementptr %struct.UnionType* %p, i32 0, i32 0, i32 0               ; <i8*> [#uses=1]
+       call void @llvm.memcpy.i32( i8* %tmp2, i8* %tmp13, i32 8, i32 0 )
+       %tmp5 = load %struct.UnionType** %pointerToUnion                ; <%struct.UnionType*> [#uses=1]
+       %tmp56 = getelementptr %struct.UnionType* %tmp5, i32 0, i32 0, i32 0            ; <i8*> [#uses=1]
+       %tmp7 = getelementptr %struct.UnionType* %tmp, i32 0, i32 0, i32 0              ; <i8*> [#uses=1]
+       call void @llvm.memcpy.i32( i8* %tmp56, i8* %tmp7, i32 8, i32 0 )
+       ret void
+}
+
+declare void @llvm.memcpy.i32(i8*, i8*, i32, i32)