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Use AssertingVH for InsertedValues and InsertedPostIncValues, to verify

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that the values they refer to aren't being deleted underneath them.

Make sure these containters get cleared by clear(), which IndVarSimplify
and LSR both use before deleting instructions.

llvm-svn: 109478
This commit is contained in:
Dan Gohman 2010-07-27 01:19:06 +00:00
parent a3f9dea4c7
commit 66b6f7d702
1 changed files with 8 additions and 3 deletions
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11
include/llvm/Analysis/ScalarEvolutionExpander.h
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@ -18,6 +18,7 @@
#include "llvm/Analysis/ScalarEvolutionNormalization.h"
#include "llvm/Support/IRBuilder.h"
#include "llvm/Support/TargetFolder.h"
#include "llvm/Support/ValueHandle.h"
#include <set>
namespace llvm {
@ -31,8 +32,8 @@ namespace llvm {
ScalarEvolution &SE;
std::map<std::pair<const SCEV *, Instruction *>, AssertingVH<Value> >
InsertedExpressions;
std::set<Value*> InsertedValues;
std::set<Value*> InsertedPostIncValues;
std::set<AssertingVH<Value> > InsertedValues;
std::set<AssertingVH<Value> > InsertedPostIncValues;
/// PostIncLoops - Addrecs referring to any of the given loops are expanded
/// in post-inc mode. For example, expanding {1,+,1}<L> in post-inc mode
@ -70,7 +71,11 @@ namespace llvm {
/// clear - Erase the contents of the InsertedExpressions map so that users
/// trying to expand the same expression into multiple BasicBlocks or
/// different places within the same BasicBlock can do so.
void clear() { InsertedExpressions.clear(); }
void clear() {
InsertedExpressions.clear();
InsertedValues.clear();
InsertedPostIncValues.clear();
}
/// getOrInsertCanonicalInductionVariable - This method returns the
/// canonical induction variable of the specified type for the specified