mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-23 17:29:19 +00:00
ceb9150268
Summary: I don't know why every singled backend had to redeclare its own DataLayout. There was a virtual getDataLayout() on the common base TargetMachine, the default implementation returned nullptr. It was not clear from this that we could assume at call site that a DataLayout will be available with each Target. Now getDataLayout() is no longer virtual and return a pointer to the DataLayout member of the common base TargetMachine. I plan to turn it into a reference in a future patch. The only backend that didn't have a DataLayout previsouly was the CPPBackend. It now initializes the default DataLayout. This commit is NFC for all the other backends. Test Plan: clang+llvm ninja check-all Reviewers: echristo Subscribers: jfb, jholewinski, llvm-commits Differential Revision: http://reviews.llvm.org/D8243 From: Mehdi Amini <mehdi.amini@apple.com> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231987 91177308-0d34-0410-b5e6-96231b3b80d8
70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
//===-- BPFTargetMachine.cpp - Define TargetMachine for BPF ---------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Implements the info about BPF target spec.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "BPF.h"
|
|
#include "BPFTargetMachine.h"
|
|
#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
|
|
#include "llvm/IR/LegacyPassManager.h"
|
|
#include "llvm/CodeGen/Passes.h"
|
|
#include "llvm/Support/FormattedStream.h"
|
|
#include "llvm/Support/TargetRegistry.h"
|
|
#include "llvm/Target/TargetOptions.h"
|
|
using namespace llvm;
|
|
|
|
extern "C" void LLVMInitializeBPFTarget() {
|
|
// Register the target.
|
|
RegisterTargetMachine<BPFTargetMachine> X(TheBPFTarget);
|
|
}
|
|
|
|
// DataLayout --> Little-endian, 64-bit pointer/ABI/alignment
|
|
// The stack is always 8 byte aligned
|
|
// On function prologue, the stack is created by decrementing
|
|
// its pointer. Once decremented, all references are done with positive
|
|
// offset from the stack/frame pointer.
|
|
BPFTargetMachine::BPFTargetMachine(const Target &T, StringRef TT, StringRef CPU,
|
|
StringRef FS, const TargetOptions &Options,
|
|
Reloc::Model RM, CodeModel::Model CM,
|
|
CodeGenOpt::Level OL)
|
|
: LLVMTargetMachine(T, "e-m:e-p:64:64-i64:64-n32:64-S128", TT, CPU, FS,
|
|
Options, RM, CM, OL),
|
|
TLOF(make_unique<TargetLoweringObjectFileELF>()),
|
|
Subtarget(TT, CPU, FS, *this) {
|
|
initAsmInfo();
|
|
}
|
|
namespace {
|
|
// BPF Code Generator Pass Configuration Options.
|
|
class BPFPassConfig : public TargetPassConfig {
|
|
public:
|
|
BPFPassConfig(BPFTargetMachine *TM, PassManagerBase &PM)
|
|
: TargetPassConfig(TM, PM) {}
|
|
|
|
BPFTargetMachine &getBPFTargetMachine() const {
|
|
return getTM<BPFTargetMachine>();
|
|
}
|
|
|
|
bool addInstSelector() override;
|
|
};
|
|
}
|
|
|
|
TargetPassConfig *BPFTargetMachine::createPassConfig(PassManagerBase &PM) {
|
|
return new BPFPassConfig(this, PM);
|
|
}
|
|
|
|
// Install an instruction selector pass using
|
|
// the ISelDag to gen BPF code.
|
|
bool BPFPassConfig::addInstSelector() {
|
|
addPass(createBPFISelDag(getBPFTargetMachine()));
|
|
|
|
return false;
|
|
}
|