From 4e8b511063722c64a7b93032398d115d2b5c8bd4 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Tue, 14 Jun 2011 20:38:50 +0000
Subject: [PATCH] Add a test for the recent regression.

llvm-svn: 133009
---
 test/CodeGen/X86/undef-label.ll | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 test/CodeGen/X86/undef-label.ll

diff --git a/test/CodeGen/X86/undef-label.ll b/test/CodeGen/X86/undef-label.ll
new file mode 100644
index 00000000000..1afd93527b8
--- /dev/null
+++ b/test/CodeGen/X86/undef-label.ll
@@ -0,0 +1,19 @@
+; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s
+
+; This is a case where we would incorrectly conclude that LBB0_1 could only
+; be reached via fall through and would therefore omit the label.
+
+; CHECK:      jne     .LBB0_1
+; CHECK-NEXT: jnp     .LBB0_3
+; CHECK-NEXT: .LBB0_1:
+
+define void @xyz() {
+entry:
+  br i1 fcmp oeq (double fsub (double undef, double undef), double 0.000000e+00), label %bar, label %foo
+
+foo:
+  br i1 fcmp ogt (double fdiv (double fsub (double fmul (double undef, double undef), double fsub (double undef, double undef)), double fmul (double undef, double undef)), double 1.0), label %foo, label %bar
+
+bar:
+  ret void
+}