mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-21 03:53:04 +02:00
c702b7f668
-mcpu=# will support:
. generic: the default insn set
. v1: insn set version 1, the same as generic
. v2: insn set version 2, version 1 + additional jmp insns
. probe: the compiler will probe the underlying kernel to
decide proper version of insn set.
We did not not use -mcpu=native since llc/llvm will interpret -mcpu=native
as the underlying hardware architecture regardless of -march value.
Currently, only x86_64 supports -mcpu=probe. Other architecture will
silently revert to "generic".
Also added -mcpu=help to print available cpu parameters.
llvm will print out the information only if there are at least one
cpu and at least one feature. Add an unused dummy feature to
enable the printout.
Examples for usage:
$ llc -march=bpf -mcpu=v1 -filetype=asm t.ll
$ llc -march=bpf -mcpu=v2 -filetype=asm t.ll
$ llc -march=bpf -mcpu=generic -filetype=asm t.ll
$ llc -march=bpf -mcpu=probe -filetype=asm t.ll
$ llc -march=bpf -mcpu=v3 -filetype=asm t.ll
'v3' is not a recognized processor for this target (ignoring processor)
...
$ llc -march=bpf -mcpu=help -filetype=asm t.ll
Available CPUs for this target:
generic - Select the generic processor.
probe - Select the probe processor.
v1 - Select the v1 processor.
v2 - Select the v2 processor.
Available features for this target:
dummy - unused feature.
Use +feature to enable a feature, or -feature to disable it.
For example, llc -mcpu=mycpu -mattr=+feature1,-feature2
...
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
llvm-svn: 311522
80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
//===-- BPFSubtarget.h - Define Subtarget for the BPF -----------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file declares the BPF specific subclass of TargetSubtargetInfo.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_BPF_BPFSUBTARGET_H
|
|
#define LLVM_LIB_TARGET_BPF_BPFSUBTARGET_H
|
|
|
|
#include "BPFFrameLowering.h"
|
|
#include "BPFISelLowering.h"
|
|
#include "BPFInstrInfo.h"
|
|
#include "llvm/CodeGen/SelectionDAGTargetInfo.h"
|
|
#include "llvm/IR/DataLayout.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Target/TargetSubtargetInfo.h"
|
|
|
|
#define GET_SUBTARGETINFO_HEADER
|
|
#include "BPFGenSubtargetInfo.inc"
|
|
|
|
namespace llvm {
|
|
class StringRef;
|
|
|
|
class BPFSubtarget : public BPFGenSubtargetInfo {
|
|
virtual void anchor();
|
|
BPFInstrInfo InstrInfo;
|
|
BPFFrameLowering FrameLowering;
|
|
BPFTargetLowering TLInfo;
|
|
SelectionDAGTargetInfo TSInfo;
|
|
|
|
private:
|
|
void initializeEnvironment();
|
|
void initSubtargetFeatures(StringRef CPU, StringRef FS);
|
|
bool probeJmpExt();
|
|
|
|
protected:
|
|
// unused
|
|
bool isDummyMode;
|
|
|
|
// whether the cpu supports jmp ext
|
|
bool HasJmpExt;
|
|
|
|
public:
|
|
// This constructor initializes the data members to match that
|
|
// of the specified triple.
|
|
BPFSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS,
|
|
const TargetMachine &TM);
|
|
|
|
BPFSubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS);
|
|
|
|
// ParseSubtargetFeatures - Parses features string setting specified
|
|
// subtarget options. Definition of function is auto generated by tblgen.
|
|
void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
|
|
bool getHasJmpExt() const { return HasJmpExt; }
|
|
|
|
const BPFInstrInfo *getInstrInfo() const override { return &InstrInfo; }
|
|
const BPFFrameLowering *getFrameLowering() const override {
|
|
return &FrameLowering;
|
|
}
|
|
const BPFTargetLowering *getTargetLowering() const override {
|
|
return &TLInfo;
|
|
}
|
|
const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
|
|
return &TSInfo;
|
|
}
|
|
const TargetRegisterInfo *getRegisterInfo() const override {
|
|
return &InstrInfo.getRegisterInfo();
|
|
}
|
|
};
|
|
} // End llvm namespace
|
|
|
|
#endif
|