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[CFLGraph] Fix a crash due to missing handling of freeze

Browse Source 
https://reviews.llvm.org/D85534#2636321
This commit is contained in:
Juneyoung Lee 2021-03-21 02:14:06 +09:00
parent c789b50f4d
commit 4bb78e2cb0
1 changed files with 7 additions and 0 deletions
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7
lib/Analysis/CFLGraph.h
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@ -284,6 +284,13 @@ template <typename CFLAA> class CFLGraphBuilder {
addAssignEdge(Src, &Inst); addAssignEdge(Src, &Inst);
} }
void visitFreezeInst(FreezeInst &Inst) {
// Accessing freeze(ptr) is equivalent to accessing ptr.
// The former raises UB iff latter raises UB.
auto *Src = Inst.getOperand(0);
addAssignEdge(Src, &Inst);
}
void visitBinaryOperator(BinaryOperator &Inst) { void visitBinaryOperator(BinaryOperator &Inst) {
auto *Op1 = Inst.getOperand(0); auto *Op1 = Inst.getOperand(0);
auto *Op2 = Inst.getOperand(1); auto *Op2 = Inst.getOperand(1);