From: Dan Gohman <gohman@apple.com>
Date: Mon, 7 Sep 2009 22:34:43 +0000 (+0000)
Subject: Preserve the InBounds flag when evaluating a getelementptr instruction
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4a7e6b7a15cea1f8ead4d1bb1cf2e3a39a339cb3;p=oota-llvm.git

Preserve the InBounds flag when evaluating a getelementptr instruction
into a getelementptr ConstantExpr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81162 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 594243c3db9..293de6c7f4e 100644
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -2227,8 +2227,9 @@ static bool EvaluateFunction(Function *F, Constant *&RetVal,
       for (User::op_iterator i = GEP->op_begin() + 1, e = GEP->op_end();
            i != e; ++i)
         GEPOps.push_back(getVal(Values, *i));
-      InstResult =
-            ConstantExpr::getGetElementPtr(P, &GEPOps[0], GEPOps.size());
+      InstResult = cast<GEPOperator>(GEP)->isInBounds() ?
+          ConstantExpr::getInBoundsGetElementPtr(P, &GEPOps[0], GEPOps.size()) :
+          ConstantExpr::getGetElementPtr(P, &GEPOps[0], GEPOps.size());
     } else if (LoadInst *LI = dyn_cast<LoadInst>(CurInst)) {
       if (LI->isVolatile()) return false;  // no volatile accesses.
       InstResult = ComputeLoadResult(getVal(Values, LI->getOperand(0)),