//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//===----------------------------------------------------------------------===//
#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Constant.h"
#include "llvm/DerivedTypes.h"
using namespace llvm;
-namespace llvm {
- // External object describing the machine instructions Initialized only when
- // the TargetMachine class is created and reset when that class is destroyed.
- //
- // FIXME: UGLY SPARCV9 HACK!
- const TargetInstrDescriptor* TargetInstrDescriptors = 0;
-}
-
-TargetInstrInfo::TargetInstrInfo(const TargetInstrDescriptor* Desc,
+TargetInstrInfo::TargetInstrInfo(const TargetInstrDesc* Desc,
unsigned numOpcodes)
- : desc(Desc), NumOpcodes(numOpcodes) {
- // FIXME: TargetInstrDescriptors should not be global
- assert(TargetInstrDescriptors == NULL && desc != NULL
- && "TargetMachine data structure corrupt; maybe you tried to create another TargetMachine? (only one may exist in a program)");
- TargetInstrDescriptors = desc; // initialize global variable
+ : Descriptors(Desc), NumOpcodes(numOpcodes) {
}
TargetInstrInfo::~TargetInstrInfo() {
- TargetInstrDescriptors = NULL; // reset global variable
}
-// FIXME: SPARCV9 SPECIFIC!
-bool TargetInstrInfo::constantFitsInImmedField(MachineOpCode opCode,
- int64_t intValue) const {
- // First, check if opCode has an immed field.
- bool isSignExtended;
- uint64_t maxImmedValue = maxImmedConstant(opCode, isSignExtended);
- if (maxImmedValue != 0)
- {
- // NEED TO HANDLE UNSIGNED VALUES SINCE THEY MAY BECOME MUCH
- // SMALLER AFTER CASTING TO SIGN-EXTENDED int, short, or char.
- // See CreateUIntSetInstruction in SparcInstrInfo.cpp.
-
- // Now check if the constant fits
- if (intValue <= (int64_t) maxImmedValue &&
- intValue >= -((int64_t) maxImmedValue+1))
- return true;
- }
-
- return false;
+bool TargetInstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {
+ const TargetInstrDesc &TID = MI->getDesc();
+ if (!TID.isTerminator()) return false;
+
+ // Conditional branch is a special case.
+ if (TID.isBranch() && !TID.isBarrier())
+ return true;
+ if (!TID.isPredicable())
+ return true;
+ return !isPredicated(MI);
}
-// commuteInstruction - The default implementation of this method just exchanges
-// operand 1 and 2.
-MachineInstr *TargetInstrInfo::commuteInstruction(MachineInstr *MI) const {
- assert(MI->getOperand(1).isRegister() && MI->getOperand(2).isRegister() &&
- "This only knows how to commute register operands so far");
- unsigned Reg1 = MI->getOperand(1).getReg();
- unsigned Reg2 = MI->getOperand(1).getReg();
- MI->SetMachineOperandReg(2, Reg1);
- MI->SetMachineOperandReg(1, Reg2);
- return MI;
+/// getInstrOperandRegClass - Return register class of the operand of an
+/// instruction of the specified TargetInstrDesc.
+const TargetRegisterClass*
+llvm::getInstrOperandRegClass(const TargetRegisterInfo *TRI,
+ const TargetInstrDesc &II, unsigned Op) {
+ if (Op >= II.getNumOperands())
+ return NULL;
+ if (II.OpInfo[Op].isLookupPtrRegClass())
+ return TRI->getPointerRegClass();
+ return TRI->getRegClass(II.OpInfo[Op].RegClass);
}