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Use findCommutedOpIndices to find the operands to commute.
llvm-svn: 75312
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88593195a0
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@ -18,16 +18,26 @@
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/PseudoSourceValue.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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// commuteInstruction - The default implementation of this method just exchanges
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// operand 1 and 2.
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// the two operands returned by findCommutedOpIndices.
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MachineInstr *TargetInstrInfoImpl::commuteInstruction(MachineInstr *MI,
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bool NewMI) const {
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const TargetInstrDesc &TID = MI->getDesc();
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bool HasDef = TID.getNumDefs();
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unsigned Idx1 = HasDef ? 1 : 0;
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unsigned Idx2 = HasDef ? 2 : 1;
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if (HasDef && !MI->getOperand(0).isReg())
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// No idea how to commute this instruction. Target should implement its own.
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return 0;
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unsigned Idx1, Idx2;
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if (!findCommutedOpIndices(MI, Idx1, Idx2)) {
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std::string msg;
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raw_string_ostream Msg(msg);
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Msg << "Don't know how to commute: " << *MI;
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llvm_report_error(Msg.str());
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}
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assert(MI->getOperand(Idx1).isReg() && MI->getOperand(Idx2).isReg() &&
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"This only knows how to commute register operands so far");
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