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I think that V8 should coallesce registers, don't you?

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llvm-svn: 15192
This commit is contained in:
Chris Lattner 2004-07-25 06:19:04 +00:00
parent d4ef731684
commit 5196d002f9
2 changed files with 25 additions and 0 deletions
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19
lib/Target/SparcV8/SparcV8InstrInfo.cpp
View File

@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#include "SparcV8InstrInfo.h"
#include "SparcV8.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "SparcV8GenInstrInfo.inc"
using namespace llvm;
@ -20,3 +21,21 @@ SparcV8InstrInfo::SparcV8InstrInfo()
: TargetInstrInfo(SparcV8Insts, sizeof(SparcV8Insts)/sizeof(SparcV8Insts[0])){
}
/// Return true if the instruction is a register to register move and
/// leave the source and dest operands in the passed parameters.
///
bool SparcV8InstrInfo::isMoveInstr(const MachineInstr &MI,
unsigned &SrcReg, unsigned &DstReg) const {
if (MI.getOpcode() == V8::ORrr) {
if (MI.getOperand(1).getReg() == V8::G0) { // X = or G0, Y -> X = Y
DstReg = MI.getOperand(0).getReg();
SrcReg = MI.getOperand(2).getReg();
}
return true;
} else if (MI.getOpcode() == V8::FMOVS) {
SrcReg = MI.getOperand(1).getReg();
DstReg = MI.getOperand(0).getReg();
return true;
}
return false;
}

6
lib/Target/SparcV8/SparcV8InstrInfo.h
View File

@ -41,6 +41,12 @@ public:
/// always be able to get register info as well (through this method).
///
virtual const MRegisterInfo &getRegisterInfo() const { return RI; }
/// Return true if the instruction is a register to register move and
/// leave the source and dest operands in the passed parameters.
///
virtual bool isMoveInstr(const MachineInstr &MI,
unsigned &SrcReg, unsigned &DstReg) const;
};
}