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1285ec2ae7
a header file from libcodegen. This violates a layering order: codegen depends on target, not the other way around. The fix to this is to split TII into two classes, TII and TargetInstrInfoImpl, which defines stuff that depends on libcodegen. It is defined in libcodegen, where the base is not. llvm-svn: 45475
52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
//===-- TargetInstrInfo.cpp - Target Instruction Information --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the TargetInstrInfo class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Target/TargetInstrInfo.h"
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#include "llvm/Constant.h"
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#include "llvm/DerivedTypes.h"
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using namespace llvm;
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/// findTiedToSrcOperand - Returns the operand that is tied to the specified
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/// dest operand. Returns -1 if there isn't one.
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int TargetInstrDescriptor::findTiedToSrcOperand(unsigned OpNum) const {
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for (unsigned i = 0, e = numOperands; i != e; ++i) {
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if (i == OpNum)
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continue;
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if (getOperandConstraint(i, TOI::TIED_TO) == (int)OpNum)
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return i;
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}
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return -1;
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}
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TargetInstrInfo::TargetInstrInfo(const TargetInstrDescriptor* Desc,
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unsigned numOpcodes)
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: desc(Desc), NumOpcodes(numOpcodes) {
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}
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TargetInstrInfo::~TargetInstrInfo() {
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}
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bool TargetInstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {
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const TargetInstrDescriptor *TID = MI->getInstrDescriptor();
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if (TID->Flags & M_TERMINATOR_FLAG) {
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// Conditional branch is a special case.
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if ((TID->Flags & M_BRANCH_FLAG) != 0 && (TID->Flags & M_BARRIER_FLAG) == 0)
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return true;
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if ((TID->Flags & M_PREDICABLE) == 0)
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return true;
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return !isPredicated(MI);
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}
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return false;
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}
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