mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-07 12:07:17 +00:00
765aab84d6
This reverts commit r233055. It still causes buildbot failures (gcc running out of memory on several platforms, and a self-host failure on arm), although less than the previous time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233068 91177308-0d34-0410-b5e6-96231b3b80d8
106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
//===-- llvm/MC/SubtargetFeature.h - CPU characteristics --------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines and manages user or tool specified CPU characteristics.
|
|
// The intent is to be able to package specific features that should or should
|
|
// not be used on a specific target processor. A tool, such as llc, could, as
|
|
// as example, gather chip info from the command line, a long with features
|
|
// that should be used on that chip.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_MC_SUBTARGETFEATURE_H
|
|
#define LLVM_MC_SUBTARGETFEATURE_H
|
|
|
|
#include "llvm/ADT/ArrayRef.h"
|
|
#include "llvm/ADT/Triple.h"
|
|
#include "llvm/Support/DataTypes.h"
|
|
|
|
namespace llvm {
|
|
class raw_ostream;
|
|
class StringRef;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
///
|
|
/// SubtargetFeatureKV - Used to provide key value pairs for feature and
|
|
/// CPU bit flags.
|
|
//
|
|
struct SubtargetFeatureKV {
|
|
const char *Key; // K-V key string
|
|
const char *Desc; // Help descriptor
|
|
uint64_t Value; // K-V integer value
|
|
uint64_t Implies; // K-V bit mask
|
|
|
|
// Compare routine for std::lower_bound
|
|
bool operator<(StringRef S) const {
|
|
return StringRef(Key) < S;
|
|
}
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
///
|
|
/// SubtargetInfoKV - Used to provide key value pairs for CPU and arbitrary
|
|
/// pointers.
|
|
//
|
|
struct SubtargetInfoKV {
|
|
const char *Key; // K-V key string
|
|
const void *Value; // K-V pointer value
|
|
|
|
// Compare routine for std::lower_bound
|
|
bool operator<(StringRef S) const {
|
|
return StringRef(Key) < S;
|
|
}
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
///
|
|
/// SubtargetFeatures - Manages the enabling and disabling of subtarget
|
|
/// specific features. Features are encoded as a string of the form
|
|
/// "+attr1,+attr2,-attr3,...,+attrN"
|
|
/// A comma separates each feature from the next (all lowercase.)
|
|
/// Each of the remaining features is prefixed with + or - indicating whether
|
|
/// that feature should be enabled or disabled contrary to the cpu
|
|
/// specification.
|
|
///
|
|
|
|
class SubtargetFeatures {
|
|
std::vector<std::string> Features; // Subtarget features as a vector
|
|
public:
|
|
explicit SubtargetFeatures(StringRef Initial = "");
|
|
|
|
/// Features string accessors.
|
|
std::string getString() const;
|
|
|
|
/// Adding Features.
|
|
void AddFeature(StringRef String);
|
|
|
|
/// ToggleFeature - Toggle a feature and returns the newly updated feature
|
|
/// bits.
|
|
uint64_t ToggleFeature(uint64_t Bits, StringRef String,
|
|
ArrayRef<SubtargetFeatureKV> FeatureTable);
|
|
|
|
/// Get feature bits of a CPU.
|
|
uint64_t getFeatureBits(StringRef CPU,
|
|
ArrayRef<SubtargetFeatureKV> CPUTable,
|
|
ArrayRef<SubtargetFeatureKV> FeatureTable);
|
|
|
|
/// Print feature string.
|
|
void print(raw_ostream &OS) const;
|
|
|
|
// Dump feature info.
|
|
void dump() const;
|
|
|
|
/// Adds the default features for the specified target triple.
|
|
void getDefaultSubtargetFeatures(const Triple& Triple);
|
|
};
|
|
|
|
} // End namespace llvm
|
|
|
|
#endif
|