From 44365353a415d37daae9df53fbf6a91677ed90d3 Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Mon, 31 Dec 2012 19:51:10 +0000 Subject: Revert "add support for PHI nodes to ObjectSizeOffsetVisitor" This reverts r171298. Breaks clang selfhost. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171318 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Analysis/MemoryBuiltins.cpp | 17 +++-------------- 1 file changed, 3 insertions(+), 14 deletions(-) (limited to 'lib/Analysis/MemoryBuiltins.cpp') diff --git a/lib/Analysis/MemoryBuiltins.cpp b/lib/Analysis/MemoryBuiltins.cpp index a565617f21..14815801d1 100644 --- a/lib/Analysis/MemoryBuiltins.cpp +++ b/lib/Analysis/MemoryBuiltins.cpp @@ -543,20 +543,9 @@ SizeOffsetType ObjectSizeOffsetVisitor::visitLoadInst(LoadInst&) { return unknown(); } -SizeOffsetType ObjectSizeOffsetVisitor::visitPHINode(PHINode &PHI) { - if (PHI.getNumIncomingValues() == 0) - return unknown(); - - SizeOffsetType Ret = compute(PHI.getIncomingValue(0)); - if (!bothKnown(Ret)) - return unknown(); - - // verify that all PHI incoming pointers have the same size and offset - for (unsigned i = 1, e = PHI.getNumIncomingValues(); i != e; ++i) { - if (compute(PHI.getIncomingValue(i)) != Ret) - return unknown(); - } - return Ret; +SizeOffsetType ObjectSizeOffsetVisitor::visitPHINode(PHINode&) { + // too complex to analyze statically. + return unknown(); } SizeOffsetType ObjectSizeOffsetVisitor::visitSelectInst(SelectInst &I) { -- cgit v1.2.3-70-g09d2