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Fix

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http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070423/048333.html


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36380 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2007-04-23 22:42:03 +00:00
parent 9690809ddd
commit 2a5fa18997
1 changed files with 9 additions and 5 deletions
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14
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -416,12 +416,16 @@ bool LoopStrengthReduce::AddUsersIfInteresting(Instruction *I, Loop *L,
if (!getSCEVStartAndStride(ISE, L, Start, Stride))
return false; // Non-reducible symbolic expression, bail out.
for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E;) {
Instruction *User = cast<Instruction>(*UI);
std::vector<Instruction *> IUsers;
// Collect all I uses now because IVUseShouldUsePostIncValue may
// invalidate use_iterator.
for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E; ++UI)
IUsers.push_back(cast<Instruction>(*UI));
// Increment iterator now because IVUseShouldUsePostIncValue may remove
// User from the list of I users.
++UI;
for (unsigned iused_index = 0, iused_size = IUsers.size();
iused_index != iused_size; ++iused_index) {
Instruction *User = IUsers[iused_index];
// Do not infinitely recurse on PHI nodes.
if (isa<PHINode>(User) && Processed.count(User))