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llvm-mirror/include/llvm/CallingConv.h
Reid Spencer 370c74131e For PR778:
Move file-scoped documentation to class-scoped so it is more readily
accessible.

llvm-svn: 28689
2006-06-05 16:29:06 +00:00

64 lines
2.4 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
};
} // End CallingConv namespace
} // End llvm namespace
#endif