From: Chris Lattner <sabre@nondot.org>
Date: Mon, 15 Dec 2008 21:20:32 +0000 (+0000)
Subject: Use stripPointerCasts.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=344b41cfbd30980a2194c56db382b0537d087ea9;p=oota-llvm.git

Use stripPointerCasts.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61047 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 62e671fb611..41ff3f37d56 100644
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -1358,13 +1358,8 @@ static bool TryToOptimizeStoreOfMallocToGlobal(GlobalVariable *GV,
 static bool OptimizeOnceStoredGlobal(GlobalVariable *GV, Value *StoredOnceVal,
                                      Module::global_iterator &GVI,
                                      TargetData &TD) {
-  if (BitCastInst *CI = dyn_cast<BitCastInst>(StoredOnceVal))
-    StoredOnceVal = CI->getOperand(0);
-  else if (GetElementPtrInst *GEPI =dyn_cast<GetElementPtrInst>(StoredOnceVal)){
-    // "getelementptr Ptr, 0, 0, 0" is really just a cast.
-    if (GEPI->hasAllZeroIndices())
-      StoredOnceVal = GEPI->getOperand(0);
-  }
+  // Ignore no-op GEPs and bitcasts.
+  StoredOnceVal = StoredOnceVal->stripPointerCasts();
 
   // If we are dealing with a pointer global that is initialized to null and
   // only has one (non-null) value stored into it, then we can optimize any