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Fix for PR2190. Memdep's non-local caching was checking dirtied blocks in the 

wrong order.

llvm-svn: 49499
This commit is contained in:
Owen Anderson 2008-04-10 22:13:32 +00:00
parent f4bc782495
commit 53336d8055
1 changed files with 4 additions and 2 deletions
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6
llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
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@ -181,7 +181,9 @@ void MemoryDependenceAnalysis::nonLocalHelper(Instruction* query,
// Current stack of the DFS // Current stack of the DFS
SmallVector<BasicBlock*, 4> stack; SmallVector<BasicBlock*, 4> stack;
stack.push_back(block); for (pred_iterator PI = pred_begin(block), PE = pred_end(block);
PI != PE; ++PI)
stack.push_back(*PI);
// Do a basic DFS // Do a basic DFS
while (!stack.empty()) { while (!stack.empty()) {
@ -208,7 +210,7 @@ void MemoryDependenceAnalysis::nonLocalHelper(Instruction* query,
// If we re-encounter the starting block, we still need to search it // If we re-encounter the starting block, we still need to search it
// because there might be a dependency in the starting block AFTER // because there might be a dependency in the starting block AFTER
// the position of the query. This is necessary to get loops right. // the position of the query. This is necessary to get loops right.
} else if (BB == block && stack.size() > 1) { } else if (BB == block) {
visited.insert(BB); visited.insert(BB);
Instruction* localDep = getDependency(query, 0, BB); Instruction* localDep = getDependency(query, 0, BB);