Preserve CFG in MergedLoadStoreMotion. This fixes PR24426.

[oota-llvm.git] / test / Transforms / GVN / pr24426.ll

diff --git a/test/Transforms/GVN/pr24426.ll b/test/Transforms/GVN/pr24426.ll
new file mode 100644 (file)
index 0000000..76b190f
--- /dev/null
+++ b/test/Transforms/GVN/pr24426.ll
@@ -0,0 +1,18 @@
+; RUN: opt < %s -memcpyopt -mldst-motion -gvn -S | FileCheck %s
+
+declare void @check(i8)
+
+declare void @write(i8* %res)
+
+define void @test1() {
+  %1 = alloca [10 x i8]
+  %2 = bitcast [10 x i8]* %1 to i8*
+  call void @write(i8* %2)
+  %3 = load i8, i8* %2
+
+; CHECK-NOT: undef
+  call void @check(i8 %3)
+
+  ret void
+}
+