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-rw-r--r--lib/Transforms/Scalar/CodeGenPrepare.cpp14
1 files changed, 10 insertions, 4 deletions
diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp
index 1f842fb4f8..c15bd8a426 100644
--- a/lib/Transforms/Scalar/CodeGenPrepare.cpp
+++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp
@@ -71,6 +71,12 @@ namespace {
/// BackEdges - Keep a set of all the loop back edges.
///
SmallSet<std::pair<const BasicBlock*, const BasicBlock*>, 8> BackEdges;
+
+ // Keeps track of non-local addresses that have been sunk into a block. This
+ // allows us to avoid inserting duplicate code for blocks with multiple
+ // load/stores of the same address.
+ DenseMap<Value*, Value*> SunkAddrs;
+
public:
static char ID; // Pass identification, replacement for typeid
explicit CodeGenPrepare(const TargetLowering *tli = 0)
@@ -141,6 +147,9 @@ bool CodeGenPrepare::runOnFunction(Function &F) {
MadeChange |= OptimizeBlock(*BB);
EverMadeChange |= MadeChange;
}
+
+ SunkAddrs.clear();
+
return EverMadeChange;
}
@@ -968,10 +977,7 @@ bool CodeGenPrepare::OptimizeBlock(BasicBlock &BB) {
}
}
- // Keep track of non-local addresses that have been sunk into this block.
- // This allows us to avoid inserting duplicate code for blocks with multiple
- // load/stores of the same address.
- DenseMap<Value*, Value*> SunkAddrs;
+ SunkAddrs.clear();
for (BasicBlock::iterator BBI = BB.begin(), E = BB.end(); BBI != E; ) {
Instruction *I = BBI++;