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
diff --git a/lib/Analysis/MemoryBuiltins.cpp b/lib/Analysis/MemoryBuiltins.cpp
index a565617..1481580 100644
--- a/lib/Analysis/MemoryBuiltins.cpp
+++ b/lib/Analysis/MemoryBuiltins.cpp
@@ -543,20 +543,9 @@
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) {