1 files changed, 20 insertions, 0 deletions
diff --git a/test/CodeGen/X86/live-out-reg-info.ll b/test/CodeGen/X86/live-out-reg-info.ll
new file mode 100644
index 0000000000..b6fb7dfc72
--- /dev/null
+++ b/test/CodeGen/X86/live-out-reg-info.ll
@@ -0,0 +1,20 @@
+; RUN: llvm-as < %s | llc -march=x86-64 | grep testl
+
+; Make sure dagcombine doesn't eliminate the comparison due
+; to an off-by-one bug with ComputeMaskedBits information.
+
+declare void @qux()
+
+define void @foo(i32 %a) {
+  %t0 = lshr i32 %a, 23
+  br label %next
+next:
+  %t1 = and i32 %t0, 256
+  %t2 = icmp eq i32 %t1, 0
+  br i1 %t2, label %true, label %false
+true:
+  call void @qux()
+  ret void
+false:
+  ret void
+}