6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-14 15:25:25 +00:00
Code Issues Projects Releases Wiki Activity

fix PR13390: do not loop forever with self-referencing self instructions

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160876 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nuno Lopes
2012-07-27 18:21:15 +00:00
parent 75564e3514
commit e982de7be9
2 changed files with 27 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
lib/Analysis/MemoryBuiltins.cpp
View File

@@ -506,6 +506,10 @@ SizeOffsetType ObjectSizeOffsetVisitor::visitPHINode(PHINode&) {
}
SizeOffsetType ObjectSizeOffsetVisitor::visitSelectInst(SelectInst &I) {
// ignore malformed self-looping selects
if (I.getTrueValue() == &I || I.getFalseValue() == &I)
return unknown();
SizeOffsetType TrueSide = compute(I.getTrueValue());
SizeOffsetType FalseSide = compute(I.getFalseValue());
if (bothKnown(TrueSide) && bothKnown(FalseSide) && TrueSide == FalseSide)
@@ -711,6 +715,10 @@ SizeOffsetEvalType ObjectSizeOffsetEvaluator::visitPHINode(PHINode &PHI) {
}
SizeOffsetEvalType ObjectSizeOffsetEvaluator::visitSelectInst(SelectInst &I) {
// ignore malformed self-looping selects
if (I.getTrueValue() == &I || I.getFalseValue() == &I)
return unknown();
SizeOffsetEvalType TrueSide = compute_(I.getTrueValue());
SizeOffsetEvalType FalseSide = compute_(I.getFalseValue());