From: Chris Lattner <sabre@nondot.org>
Date: Fri, 28 Apr 2006 22:17:20 +0000 (+0000)
Subject: new testcase miscompiled by instcombine
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c624b5a049c688b6ac5fad903699dc1af0df17e9;p=oota-llvm.git

new testcase miscompiled by instcombine


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28018 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/test/Transforms/InstCombine/2006-04-28-ShiftShiftLongLong.ll b/test/Transforms/InstCombine/2006-04-28-ShiftShiftLongLong.ll
new file mode 100644
index 00000000000..7a164ddf4dc
--- /dev/null
+++ b/test/Transforms/InstCombine/2006-04-28-ShiftShiftLongLong.ll
@@ -0,0 +1,10 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep shl &&
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep cast
+
+; This cannot be turned into a sign extending cast!
+
+long %test(long %X) {
+	%Y = shl long %X, ubyte 16
+	%Z = shr long %Y, ubyte 16
+	ret long %Z
+}