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IfConversion's AnalyzeBlocks method always returns false; clean it up.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106027 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -167,8 +167,7 @@ namespace {
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std::vector<IfcvtToken*> &Tokens);
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bool FeasibilityAnalysis(BBInfo &BBI, SmallVectorImpl<MachineOperand> &Cond,
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bool isTriangle = false, bool RevBranch = false);
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bool AnalyzeBlocks(MachineFunction &MF,
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std::vector<IfcvtToken*> &Tokens);
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void AnalyzeBlocks(MachineFunction &MF, std::vector<IfcvtToken*> &Tokens);
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void InvalidatePreds(MachineBasicBlock *BB);
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void RemoveExtraEdges(BBInfo &BBI);
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bool IfConvertSimple(BBInfo &BBI, IfcvtKind Kind);
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@ -253,7 +252,8 @@ bool IfConverter::runOnMachineFunction(MachineFunction &MF) {
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while (IfCvtLimit == -1 || (int)NumIfCvts < IfCvtLimit) {
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// Do an initial analysis for each basic block and find all the potential
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// candidates to perform if-conversion.
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bool Change = AnalyzeBlocks(MF, Tokens);
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bool Change = false;
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AnalyzeBlocks(MF, Tokens);
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while (!Tokens.empty()) {
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IfcvtToken *Token = Tokens.back();
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Tokens.pop_back();
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@ -802,11 +802,9 @@ IfConverter::BBInfo &IfConverter::AnalyzeBlock(MachineBasicBlock *BB,
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}
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/// AnalyzeBlocks - Analyze all blocks and find entries for all if-conversion
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/// candidates. It returns true if any CFG restructuring is done to expose more
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/// if-conversion opportunities.
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bool IfConverter::AnalyzeBlocks(MachineFunction &MF,
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/// candidates.
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void IfConverter::AnalyzeBlocks(MachineFunction &MF,
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std::vector<IfcvtToken*> &Tokens) {
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bool Change = false;
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std::set<MachineBasicBlock*> Visited;
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for (unsigned i = 0, e = Roots.size(); i != e; ++i) {
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for (idf_ext_iterator<MachineBasicBlock*> I=idf_ext_begin(Roots[i],Visited),
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@ -818,8 +816,6 @@ bool IfConverter::AnalyzeBlocks(MachineFunction &MF,
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// Sort to favor more complex ifcvt scheme.
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std::stable_sort(Tokens.begin(), Tokens.end(), IfcvtTokenCmp);
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return Change;
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}
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/// canFallThroughTo - Returns true either if ToBB is the next block after BB or
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