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//===-- 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 a set of enums which specify the assigned numeric values
// for known llvm calling conventions.
namespace llvm {
/// CallingConv Namespace - This namespace contains an enum with a value for
/// the well-known calling conventions.
namespace CallingConv {
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,
// 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