commit 054cc8ad045dfae488b9a3310c2929bd987ebe7a
author Andrew Lenharth <andrewl@lenharth.org> Wed Feb 07 22:32:03 2007 +0000
committer Andrew Lenharth <andrewl@lenharth.org> Wed Feb 07 22:32:03 2007 +0000
tree 7a263fe408874d232e45c1add43a8462c1857def
parent 84c0e17e928a3600c786c614861654fded08423e

Fix miscompile of linux kernel (llvm 1.9)

llvm-svn: 34015

llvm/lib/Transforms/Scalar/InstructionCombining.cpp

diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
index f00be24..cc7d8b9 100644
--- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -377,9 +377,9 @@
   
   // If we are casting between pointer and integer types, treat pointers as
   // integers of the appropriate size for the code below.
-  if (isa<PointerType>(SrcTy)) SrcTy = TD->getIntPtrType();
-  if (isa<PointerType>(MidTy)) MidTy = TD->getIntPtrType();
-  if (isa<PointerType>(DstTy)) DstTy = TD->getIntPtrType();
+  if (isa<PointerType>(SrcTy)) SrcTy = TD->getIntPtrType()->getSignedVersion();
+  if (isa<PointerType>(MidTy)) MidTy = TD->getIntPtrType()->getSignedVersion();
+  if (isa<PointerType>(DstTy)) DstTy = TD->getIntPtrType()->getSignedVersion();
   
   // Allow free casting and conversion of sizes as long as the sign doesn't
   // change...