From: Dan Gohman <gohman@apple.com>
Date: Thu, 24 Jun 2010 16:47:03 +0000 (+0000)
Subject: Don't try to preserve pointer types in SCEVConstants; the old code
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=eaf6cf28dd312704718d53155333b4d6d7c16c7c;p=oota-llvm.git

Don't try to preserve pointer types in SCEVConstants; the old code
was over-complicated.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106760 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 24354d40282..f763d16a8c0 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -863,12 +863,10 @@ const SCEV *ScalarEvolution::getZeroExtendExpr(const SCEV *Op,
   Ty = getEffectiveSCEVType(Ty);
 
   // Fold if the operand is constant.
-  if (const SCEVConstant *SC = dyn_cast<SCEVConstant>(Op)) {
-    const Type *IntTy = getEffectiveSCEVType(Ty);
-    Constant *C = ConstantExpr::getZExt(SC->getValue(), IntTy);
-    if (IntTy != Ty) C = ConstantExpr::getIntToPtr(C, Ty);
-    return getConstant(cast<ConstantInt>(C));
-  }
+  if (const SCEVConstant *SC = dyn_cast<SCEVConstant>(Op))
+    return getConstant(
+      cast<ConstantInt>(ConstantExpr::getZExt(SC->getValue(),
+                                              getEffectiveSCEVType(Ty))));
 
   // zext(zext(x)) --> zext(x)
   if (const SCEVZeroExtendExpr *SZ = dyn_cast<SCEVZeroExtendExpr>(Op))
@@ -998,12 +996,10 @@ const SCEV *ScalarEvolution::getSignExtendExpr(const SCEV *Op,
   Ty = getEffectiveSCEVType(Ty);
 
   // Fold if the operand is constant.
-  if (const SCEVConstant *SC = dyn_cast<SCEVConstant>(Op)) {
-    const Type *IntTy = getEffectiveSCEVType(Ty);
-    Constant *C = ConstantExpr::getSExt(SC->getValue(), IntTy);
-    if (IntTy != Ty) C = ConstantExpr::getIntToPtr(C, Ty);
-    return getConstant(cast<ConstantInt>(C));
-  }
+  if (const SCEVConstant *SC = dyn_cast<SCEVConstant>(Op))
+    return getConstant(
+      cast<ConstantInt>(ConstantExpr::getSExt(SC->getValue(),
+                                              getEffectiveSCEVType(Ty))));
 
   // sext(sext(x)) --> sext(x)
   if (const SCEVSignExtendExpr *SS = dyn_cast<SCEVSignExtendExpr>(Op))