1 files changed, 14 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/ARM/undef-sext.ll b/llvm/test/CodeGen/ARM/undef-sext.ll
new file mode 100644
index 00000000000..2c28da3b646
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/undef-sext.ll
@@ -0,0 +1,14 @@
+; RUN: llc < %s -mtriple=armv7-apple-darwin -mcpu=cortex-a8 | FileCheck %s
+
+; No need to sign-extend undef.
+
+define i32 @t(i32* %a) nounwind {
+entry:
+; CHECK: t:
+; CHECK: ldr r0, [r0]
+; CHECK: bx lr
+  %0 = sext i16 undef to i32
+  %1 = getelementptr inbounds i32* %a, i32 %0
+  %2 = load i32* %1, align 4
+  ret i32 %2
+}