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llvm-mirror/include/llvm/CallingConv.h
Anton Korobeynikov 7c2118575c Added some eye-candy for Subtarget type checking
Added X86 StdCall & FastCall calling conventions. Codegen will follow.

llvm-svn: 30446
2006-09-17 20:25:45 +00:00

75 lines
2.9 KiB
C++

//===-- llvm/CallingConv.h - LLVM Calling Conventions -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines LLVM's set of calling conventions.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CALLINGCONV_H
#define LLVM_CALLINGCONV_H
namespace llvm {
/// CallingConv Namespace - This namespace contains an enum with a value for
/// the well-known calling conventions.
///
namespace CallingConv {
/// A set of enums which specify the assigned numeric values for known llvm
/// calling conventions.
/// @brief LLVM Calling Convention Representation
enum ID {
/// C - The default llvm calling convention, compatible with C. This
/// convention is the only calling convention that supports varargs calls.
/// As with typical C calling conventions, the callee/caller have to tolerate
/// certain amounts of prototype mismatch.
C = 0,
/// CSRet - C Struct Return calling convention. This convention requires
/// that the function return void and take a pointer as the first argument
/// of the struct. This is used by targets which need to distinguish
/// between C functions returning a structure, and C functions taking a
/// structure pointer as the first argument to the function.
CSRet = 1,
// Generic LLVM calling conventions. None of these calling conventions
// support varargs calls, and all assume that the caller and callee
// prototype exactly match.
/// Fast - This calling convention attempts to make calls as fast as possible
/// (e.g. by passing things in registers).
Fast = 8,
// Cold - This calling convention attempts to make code in the caller as
// efficient as possible under the assumption that the call is not commonly
// executed. As such, these calls often preserve all registers so that the
// call does not break any live ranges in the caller side.
Cold = 9,
// Target - This is the start of the target-specific calling conventions,
// e.g. fastcall and thiscall on X86.
FirstTargetCC = 64,
/// X86_StdCall - stdcall is the calling conventions mostly used by the
/// Win32 API. It is basically the same as the C convention with the
/// difference in that the callee is responsible for popping the arguments
/// from the stack.
X86_StdCall = 64,
/// X86_FastCall - 'fast' analog of X86_StdCall. Passes first two arguments
/// in ECX:EDX registers, others - via stack. Callee is responsible for
/// stack cleaning.
X86_FastCall = 65
};
} // End CallingConv namespace
} // End llvm namespace
#endif