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Fix an issue where, under very specific circumstances, memdep could end up dereferencing the end

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of one of its internal maps.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46541 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-01-30 01:24:05 +00:00
parent b10e0da065
commit 9a8ff8cd0f
1 changed files with 2 additions and 2 deletions
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4
lib/Analysis/MemoryDependenceAnalysis.cpp
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@ -451,8 +451,6 @@ void MemoryDependenceAnalysis::removeInstruction(Instruction* rem) {
// Figure out the new dep for things that currently depend on rem
Instruction* newDep = NonLocal;
reverseDep[depGraphLocal[rem].first].erase(rem);
for (DenseMap<BasicBlock*, Value*>::iterator DI =
depGraphNonLocal[rem].begin(), DE = depGraphNonLocal[rem].end();
DI != DE; ++DI)
@ -462,6 +460,8 @@ void MemoryDependenceAnalysis::removeInstruction(Instruction* rem) {
depMapType::iterator depGraphEntry = depGraphLocal.find(rem);
if (depGraphEntry != depGraphLocal.end()) {
reverseDep[depGraphLocal[rem].first].erase(rem);
if (depGraphEntry->second.first != NonLocal &&
depGraphEntry->second.second) {
// If we have dep info for rem, set them to it