Correctly lower memset / memcpy of undef. It should be a nop. PR6767.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100208 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/memset-3.ll b/test/CodeGen/X86/memset-3.ll
new file mode 100644
index 0000000..9b20ad5
--- /dev/null
+++ b/test/CodeGen/X86/memset-3.ll
@@ -0,0 +1,12 @@
+; RUN: llc -mtriple=i386-apple-darwin < %s | not grep memset
+; PR6767
+
+define void @t() nounwind ssp {
+entry:
+ %buf = alloca [512 x i8], align 1
+ %ptr = getelementptr inbounds [512 x i8]* %buf, i32 0, i32 0
+ call void @llvm.memset.i32(i8* %ptr, i8 undef, i32 512, i32 1)
+ unreachable
+}
+
+declare void @llvm.memset.i32(i8* nocapture, i8, i32, i32) nounwind