From 8a9763c3cd38cbca3a085b2d8a238199a3b5d919 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Mon, 4 Apr 2005 22:23:21 +0000 Subject: [PATCH] do not dereference an extra layer of pointers to determine if an external call can modify a memory location. This fixes test/Regression/Analysis/Andersens/modreftest.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21088 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Analysis/IPA/Andersens.cpp | 17 +++++------------ 1 file changed, 5 insertions(+), 12 deletions(-) diff --git a/lib/Analysis/IPA/Andersens.cpp b/lib/Analysis/IPA/Andersens.cpp index 146c88aaebd..2bfac755507 100644 --- a/lib/Analysis/IPA/Andersens.cpp +++ b/lib/Analysis/IPA/Andersens.cpp @@ -374,19 +374,12 @@ Andersens::getModRefInfo(CallSite CS, Value *P, unsigned Size) { Node *N1 = getNode(P); bool PointsToUniversalSet = false; - for (Node::iterator NI = N1->begin(), E = N1->end(); NI != E; ++NI) { - Node *PN = *NI; - if (PN->begin() == PN->end()) - continue; // P doesn't point to anything. - // Get the first pointee. - Node *FirstPointee = *PN->begin(); - if (FirstPointee == &GraphNodes[UniversalSet]) { - PointsToUniversalSet = true; - break; - } - } + if (N1->begin() == N1->end()) + return NoModRef; // P doesn't point to anything. - if (!PointsToUniversalSet) + // Get the first pointee. + Node *FirstPointee = *N1->begin(); + if (FirstPointee != &GraphNodes[UniversalSet]) return NoModRef; // P doesn't point to the universal set. } -- 2.34.1