llvm-6502/include/llvm/Support/CodeGen.h
Justin Hibbits 893f22f882 Add Position-independent Code model Module API.
Summary:
This makes PIC levels a Module flag attribute, which can be queried by the
backend.  The flag is named `PIC Level`, and can have a value of:

  0 - Backend-default
  1 - Small-model (-fpic)
  2 - Large-model (-fPIC)

These match the `-pic-level' command line argument for clang, and the value of the
preprocessor macro `__PIC__'.

Test Plan:
New flags tests specific for the 'PIC Level' module flag.
Tests to be added as part of a future commit for PowerPC, which will use this new API.

Reviewers: rafael, echristo

Reviewed By: rafael, echristo

Subscribers: rafael, llvm-commits

Differential Revision: http://reviews.llvm.org/D5882

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221510 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-07 04:46:10 +00:00

96 lines
2.4 KiB
C++

//===-- llvm/Support/CodeGen.h - CodeGen Concepts ---------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file define some types which define code generation concepts. For
// example, relocation model.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_CODEGEN_H
#define LLVM_SUPPORT_CODEGEN_H
#include "llvm-c/TargetMachine.h"
#include "llvm/Support/ErrorHandling.h"
namespace llvm {
// Relocation model types.
namespace Reloc {
enum Model { Default, Static, PIC_, DynamicNoPIC };
}
// Code model types.
namespace CodeModel {
enum Model { Default, JITDefault, Small, Kernel, Medium, Large };
}
namespace PICLevel {
enum Level { Default=0, Small=1, Large=2 };
}
// TLS models.
namespace TLSModel {
enum Model {
GeneralDynamic,
LocalDynamic,
InitialExec,
LocalExec
};
}
// Code generation optimization level.
namespace CodeGenOpt {
enum Level {
None, // -O0
Less, // -O1
Default, // -O2, -Os
Aggressive // -O3
};
}
// Create wrappers for C Binding types (see CBindingWrapping.h).
inline CodeModel::Model unwrap(LLVMCodeModel Model) {
switch (Model) {
case LLVMCodeModelDefault:
return CodeModel::Default;
case LLVMCodeModelJITDefault:
return CodeModel::JITDefault;
case LLVMCodeModelSmall:
return CodeModel::Small;
case LLVMCodeModelKernel:
return CodeModel::Kernel;
case LLVMCodeModelMedium:
return CodeModel::Medium;
case LLVMCodeModelLarge:
return CodeModel::Large;
}
return CodeModel::Default;
}
inline LLVMCodeModel wrap(CodeModel::Model Model) {
switch (Model) {
case CodeModel::Default:
return LLVMCodeModelDefault;
case CodeModel::JITDefault:
return LLVMCodeModelJITDefault;
case CodeModel::Small:
return LLVMCodeModelSmall;
case CodeModel::Kernel:
return LLVMCodeModelKernel;
case CodeModel::Medium:
return LLVMCodeModelMedium;
case CodeModel::Large:
return LLVMCodeModelLarge;
}
llvm_unreachable("Bad CodeModel!");
}
} // end llvm namespace
#endif