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Reorganize code for locality, improve comments
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9857 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -11,7 +11,8 @@
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// inserting a dummy basic block. This pass may be "required" by passes that
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// cannot deal with critical edges. For this usage, the structure type is
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// forward declared. This pass obviously invalidates the CFG, but can update
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// forward dominator (set, immediate dominators, and tree) information.
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// forward dominator (set, immediate dominators, tree, and frontier)
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// information.
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//
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//===----------------------------------------------------------------------===//
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@ -49,6 +50,27 @@ namespace {
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const PassInfo *BreakCriticalEdgesID = X.getPassInfo();
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Pass *createBreakCriticalEdgesPass() { return new BreakCriticalEdges(); }
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// runOnFunction - Loop over all of the edges in the CFG, breaking critical
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// edges as they are found.
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//
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bool BreakCriticalEdges::runOnFunction(Function &F) {
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bool Changed = false;
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for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
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TerminatorInst *TI = I->getTerminator();
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if (TI->getNumSuccessors() > 1)
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for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i)
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if (SplitCriticalEdge(TI, i, this)) {
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++NumBroken;
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Changed = true;
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}
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}
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return Changed;
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}
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//===----------------------------------------------------------------------===//
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// Implementation of the external critical edge manipulation functions
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//===----------------------------------------------------------------------===//
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// isCriticalEdge - Return true if the specified edge is a critical edge.
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// Critical edges are edges from a block with multiple successors to a block
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@ -146,21 +168,3 @@ bool SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum, Pass *P) {
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}
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return true;
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}
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// runOnFunction - Loop over all of the edges in the CFG, breaking critical
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// edges as they are found.
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//
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bool BreakCriticalEdges::runOnFunction(Function &F) {
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bool Changed = false;
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for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
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TerminatorInst *TI = I->getTerminator();
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if (TI->getNumSuccessors() > 1)
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for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i)
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if (SplitCriticalEdge(TI, i, this)) {
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++NumBroken;
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Changed = true;
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}
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}
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return Changed;
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}
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