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Fix ADCE/2003-12-19-MergeReturn.llx
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10539 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -14,21 +14,21 @@
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/Scalar.h"
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#include "llvm/Transforms/Utils/Local.h"
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#include "llvm/Transforms/Utils/BasicBlockUtils.h"
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#include "llvm/Type.h"
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#include "llvm/Analysis/PostDominators.h"
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#include "llvm/iTerminators.h"
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#include "llvm/iPHINode.h"
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#include "llvm/Constant.h"
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#include "llvm/Support/CFG.h"
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#include "llvm/Transforms/Utils/BasicBlockUtils.h"
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#include "llvm/Transforms/Utils/Local.h"
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#include "llvm/Transforms/Utils/UnifyFunctionExitNodes.h"
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#include "Support/Debug.h"
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#include "Support/DepthFirstIterator.h"
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#include "Support/Statistic.h"
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#include "Support/STLExtras.h"
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#include <algorithm>
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namespace llvm {
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using namespace llvm;
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namespace {
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Statistic<> NumBlockRemoved("adce", "Number of basic blocks removed");
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@ -61,6 +61,9 @@ public:
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// getAnalysisUsage - We require post dominance frontiers (aka Control
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// Dependence Graph)
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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// We require that all function nodes are unified, because otherwise code
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// can be marked live that wouldn't necessarily be otherwise.
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AU.addRequired<UnifyFunctionExitNodes>();
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AU.addRequired<PostDominatorTree>();
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AU.addRequired<PostDominanceFrontier>();
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}
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@ -101,7 +104,7 @@ private:
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RegisterOpt<ADCE> X("adce", "Aggressive Dead Code Elimination");
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} // End of anonymous namespace
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Pass *createAggressiveDCEPass() { return new ADCE(); }
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Pass *llvm::createAggressiveDCEPass() { return new ADCE(); }
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void ADCE::markBlockAlive(BasicBlock *BB) {
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// Mark the basic block as being newly ALIVE... and mark all branches that
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@ -474,5 +477,3 @@ bool ADCE::doADCE() {
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return MadeChanges;
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}
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} // End llvm namespace
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