From ac72dc81f4164149e5abf0ac0f8fbe5cdb53337c Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Wed, 11 Oct 2006 07:01:37 +0000
Subject: [PATCH] Test case for the recently fixed FindModifiedNodeSlot bug.

llvm-svn: 30877
---
 .../X86/2006-10-10-FindModifiedNodeSlotBug.ll | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 llvm/test/Regression/CodeGen/X86/2006-10-10-FindModifiedNodeSlotBug.ll

diff --git a/llvm/test/Regression/CodeGen/X86/2006-10-10-FindModifiedNodeSlotBug.ll b/llvm/test/Regression/CodeGen/X86/2006-10-10-FindModifiedNodeSlotBug.ll
new file mode 100644
index 000000000000..5cb233bd5fbe
--- /dev/null
+++ b/llvm/test/Regression/CodeGen/X86/2006-10-10-FindModifiedNodeSlotBug.ll
@@ -0,0 +1,31 @@
+; RUN: llvm-as < %s | llc -march=x86 | grep shrl
+; Bug in FindModifiedNodeSlot cause tmp14 load to become a zextload and shr 31
+; is then optimized away.
+
+%tree_code_type = external global [0 x uint]
+
+void %copy_if_shared_r() {
+	%tmp = load uint* null
+	%tmp56 = and uint %tmp, 255
+	%tmp8 = getelementptr [0 x uint]* %tree_code_type, int 0, uint %tmp56
+	%tmp9 = load uint* %tmp8
+	%tmp10 = add uint %tmp9, 4294967295
+	%tmp = setgt uint %tmp10, 2
+	%tmp14 = load uint* null
+	%tmp15 = shr uint %tmp14, ubyte 31
+	%tmp15 = cast uint %tmp15 to ubyte
+	%tmp16 = setne ubyte %tmp15, 0
+	br bool %tmp, label %cond_false25, label %cond_true
+
+cond_true:
+	br bool %tmp16, label %cond_true17, label %cond_false
+
+cond_true17:
+	ret void
+
+cond_false:
+	ret void
+
+cond_false25:
+	ret void
+}