mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 04:30:23 +00:00
dfcac4b07a
There's no reason to be able to mutate `MCSubtargetInfo` in `getDeprecationInfo()`. Constify the reference. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241693 91177308-0d34-0410-b5e6-96231b3b80d8
71 lines
2.6 KiB
C++
71 lines
2.6 KiB
C++
//===------ llvm/MC/MCInstrDesc.cpp- Instruction Descriptors --------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines methods on the MCOperandInfo and MCInstrDesc classes, which
|
|
// are used to describe target instructions and their operands.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/MC/MCInstrDesc.h"
|
|
#include "llvm/MC/MCInst.h"
|
|
#include "llvm/MC/MCRegisterInfo.h"
|
|
#include "llvm/MC/MCSubtargetInfo.h"
|
|
|
|
using namespace llvm;
|
|
|
|
bool MCInstrDesc::getDeprecatedInfo(MCInst &MI, const MCSubtargetInfo &STI,
|
|
std::string &Info) const {
|
|
if (ComplexDeprecationInfo)
|
|
return ComplexDeprecationInfo(MI, STI, Info);
|
|
if (DeprecatedFeature != -1 && STI.getFeatureBits()[DeprecatedFeature]) {
|
|
// FIXME: it would be nice to include the subtarget feature here.
|
|
Info = "deprecated";
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
bool MCInstrDesc::mayAffectControlFlow(const MCInst &MI,
|
|
const MCRegisterInfo &RI) const {
|
|
if (isBranch() || isCall() || isReturn() || isIndirectBranch())
|
|
return true;
|
|
unsigned PC = RI.getProgramCounter();
|
|
if (PC == 0)
|
|
return false;
|
|
if (hasDefOfPhysReg(MI, PC, RI))
|
|
return true;
|
|
// A variadic instruction may define PC in the variable operand list.
|
|
// There's currently no indication of which entries in a variable
|
|
// list are defs and which are uses. While that's the case, this function
|
|
// needs to assume they're defs in order to be conservatively correct.
|
|
for (int i = NumOperands, e = MI.getNumOperands(); i != e; ++i) {
|
|
if (MI.getOperand(i).isReg() &&
|
|
RI.isSubRegisterEq(PC, MI.getOperand(i).getReg()))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool MCInstrDesc::hasImplicitDefOfPhysReg(unsigned Reg,
|
|
const MCRegisterInfo *MRI) const {
|
|
if (const uint16_t *ImpDefs = ImplicitDefs)
|
|
for (; *ImpDefs; ++ImpDefs)
|
|
if (*ImpDefs == Reg || (MRI && MRI->isSubRegister(Reg, *ImpDefs)))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
bool MCInstrDesc::hasDefOfPhysReg(const MCInst &MI, unsigned Reg,
|
|
const MCRegisterInfo &RI) const {
|
|
for (int i = 0, e = NumDefs; i != e; ++i)
|
|
if (MI.getOperand(i).isReg() &&
|
|
RI.isSubRegisterEq(Reg, MI.getOperand(i).getReg()))
|
|
return true;
|
|
return hasImplicitDefOfPhysReg(Reg, &RI);
|
|
}
|