Move PPC getSwappedPredicate for reuse
The getSwappedPredicate function can be used in other places (such as in improvements to the PPCCTRLoops pass). Instead of trapping it as a static function in PPCInstrInfo, move it into PPCPredicates with other predicate-related things. No functionality change intended. llvm-svn: 179926
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@ -29,3 +29,18 @@ PPC::Predicate PPC::InvertPredicate(PPC::Predicate Opcode) {
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}
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llvm_unreachable("Unknown PPC branch opcode!");
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}
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PPC::Predicate PPC::getSwappedPredicate(PPC::Predicate Opcode) {
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switch (Opcode) {
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case PPC::PRED_EQ: return PPC::PRED_EQ;
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case PPC::PRED_NE: return PPC::PRED_NE;
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case PPC::PRED_LT: return PPC::PRED_GT;
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case PPC::PRED_GE: return PPC::PRED_LE;
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case PPC::PRED_GT: return PPC::PRED_LT;
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case PPC::PRED_LE: return PPC::PRED_GE;
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case PPC::PRED_NU: return PPC::PRED_NU;
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case PPC::PRED_UN: return PPC::PRED_UN;
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}
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llvm_unreachable("Unknown PPC branch opcode!");
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}
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@ -37,6 +37,10 @@ namespace PPC {
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/// Invert the specified predicate. != -> ==, < -> >=.
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Predicate InvertPredicate(Predicate Opcode);
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/// Assume the condition register is set by MI(a,b), return the predicate if
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/// we modify the instructions such that condition register is set by MI(b,a).
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Predicate getSwappedPredicate(Predicate Opcode);
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}
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}
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@ -1087,22 +1087,6 @@ bool PPCInstrInfo::analyzeCompare(const MachineInstr *MI,
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}
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}
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/// Assume the flags are set by MI(a,b), return the condition code if we modify
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/// the instructions such that flags are set by MI(b,a).
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PPC::Predicate static getSwappedPredicate(PPC::Predicate Opcode) {
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switch (Opcode) {
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case PPC::PRED_EQ: return PPC::PRED_EQ;
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case PPC::PRED_NE: return PPC::PRED_NE;
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case PPC::PRED_LT: return PPC::PRED_GT;
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case PPC::PRED_GE: return PPC::PRED_LE;
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case PPC::PRED_GT: return PPC::PRED_LT;
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case PPC::PRED_LE: return PPC::PRED_GE;
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case PPC::PRED_NU: return PPC::PRED_NU;
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case PPC::PRED_UN: return PPC::PRED_UN;
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}
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llvm_unreachable("Unknown PPC branch opcode!");
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}
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bool PPCInstrInfo::optimizeCompareInstr(MachineInstr *CmpInstr,
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unsigned SrcReg, unsigned SrcReg2,
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int Mask, int Value,
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@ -1320,7 +1304,7 @@ bool PPCInstrInfo::optimizeCompareInstr(MachineInstr *CmpInstr,
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Pred == PPC::PRED_EQ || Pred == PPC::PRED_NE) &&
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"Invalid predicate for equality-only optimization");
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PredsToUpdate.push_back(std::make_pair(&((*I).getOperand(0)),
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getSwappedPredicate(Pred)));
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PPC::getSwappedPredicate(Pred)));
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} else if (UseMI->getOpcode() == PPC::ISEL ||
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UseMI->getOpcode() == PPC::ISEL8) {
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unsigned NewSubReg = UseMI->getOperand(3).getSubReg();
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