mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-10-08 11:58:10 +00:00
276365dd4b
be the first encoded as the first feature. It then uses the CPU name to look up features / scheduling itineray even though clients know full well the CPU name being used to query these properties. The fix is to just have the clients explictly pass the CPU name! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134127 91177308-0d34-0410-b5e6-96231b3b80d8
56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
//===- MBlazeSubtarget.cpp - MBlaze Subtarget Information -------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the MBlaze specific subclass of TargetSubtarget.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "MBlazeSubtarget.h"
|
|
#include "MBlaze.h"
|
|
#include "MBlazeRegisterInfo.h"
|
|
#include "MBlazeGenSubtarget.inc"
|
|
#include "llvm/Support/CommandLine.h"
|
|
using namespace llvm;
|
|
|
|
MBlazeSubtarget::MBlazeSubtarget(const std::string &TT,
|
|
const std::string &CPU,
|
|
const std::string &FS):
|
|
HasBarrel(false), HasDiv(false), HasMul(false), HasPatCmp(false),
|
|
HasFPU(false), HasMul64(false), HasSqrt(false)
|
|
{
|
|
// Parse features string.
|
|
std::string CPUName = CPU;
|
|
if (CPUName.empty())
|
|
CPUName = "mblaze";
|
|
ParseSubtargetFeatures(FS, CPUName);
|
|
|
|
// Only use instruction scheduling if the selected CPU has an instruction
|
|
// itinerary (the default CPU is the only one that doesn't).
|
|
HasItin = CPUName != "mblaze";
|
|
DEBUG(dbgs() << "CPU " << CPUName << "(" << HasItin << ")\n");
|
|
|
|
// Compute the issue width of the MBlaze itineraries
|
|
computeIssueWidth();
|
|
}
|
|
|
|
void MBlazeSubtarget::computeIssueWidth() {
|
|
InstrItins.IssueWidth = 1;
|
|
}
|
|
|
|
bool MBlazeSubtarget::
|
|
enablePostRAScheduler(CodeGenOpt::Level OptLevel,
|
|
TargetSubtarget::AntiDepBreakMode& Mode,
|
|
RegClassVector& CriticalPathRCs) const {
|
|
Mode = TargetSubtarget::ANTIDEP_CRITICAL;
|
|
CriticalPathRCs.clear();
|
|
CriticalPathRCs.push_back(&MBlaze::GPRRegClass);
|
|
return HasItin && OptLevel >= CodeGenOpt::Default;
|
|
}
|
|
|