From 5dee3b25264c735e7b69fe8b41d43585d8202d9c Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 20 Oct 2006 18:20:21 +0000
Subject: Fix miscompilation of MallocBench/espresso which code review pointed
 out but apparently didn't make it into the final patch.

llvm-svn: 31070
---
 llvm/lib/Transforms/Scalar/InstructionCombining.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
index c30c0c924f8..bcb4888b6ae 100644
--- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -4913,7 +4913,7 @@ Instruction *InstCombiner::visitShiftInst(ShiftInst &I) {
   // shr int -1, X = -1   (for any arithmetic shift rights of ~0)
   if (!isLeftShift)
     if (ConstantInt *CSI = dyn_cast<ConstantInt>(Op0))
-      if (CSI->isAllOnesValue())
+      if (CSI->isAllOnesValue() && Op0->getType()->isSigned())
         return ReplaceInstUsesWith(I, CSI);
 
   // Try to fold constant and into select arguments.
-- 
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