From 66048c2169dd8d7541eae39e5c2aa2a935fc46fa Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Thu, 2 Sep 2010 18:23:58 +0000
Subject: Fix a bug in LazyValueInfo that CorrelatedValuePropagation exposed:
 In the LVI lattice, undef and the full set ConstantRange should not be
 treated as equivalent.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112843 91177308-0d34-0410-b5e6-96231b3b80d8
---
 .../CorrelatedValuePropagation/2010-09-02-Trunc.ll | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 test/Transforms/CorrelatedValuePropagation/2010-09-02-Trunc.ll

(limited to 'test/Transforms')

diff --git a/test/Transforms/CorrelatedValuePropagation/2010-09-02-Trunc.ll b/test/Transforms/CorrelatedValuePropagation/2010-09-02-Trunc.ll
new file mode 100644
index 0000000..f2553dc
--- /dev/null
+++ b/test/Transforms/CorrelatedValuePropagation/2010-09-02-Trunc.ll
@@ -0,0 +1,25 @@
+; RUN: opt -S < %s -correlated-propagation | FileCheck %s
+
+; CHECK: @check
+define i16 @test(i32 %a, i1 %b) {
+entry:
+  %c = icmp eq i32 %a, 0
+  br i1 %c, label %left, label %right
+
+right:
+  %d = trunc i32 %a to i1
+  br label %merge
+
+left:
+  br i1 %b, label %merge, label %other
+
+other:
+  ret i16 23
+
+merge:
+  %f = phi i1 [%b, %left], [%d, %right]
+; CHECK: select i1 %f, i16 1, i16 0 
+  %h = select i1 %f, i16 1, i16 0 
+; CHECK: ret i16 %h
+  ret i16 %h
+}
\ No newline at end of file
-- 
cgit v1.1