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//===-- llvm/CallingConv.h - LLVM Calling Conventions -----------*- 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 LLVM's set of calling conventions.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_IR_CALLINGCONV_H
#define LLVM_IR_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,
// 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,
// GHC - Calling convention used by the Glasgow Haskell Compiler (GHC).
GHC = 10,
// HiPE - Calling convention used by the High-Performance Erlang Compiler
// (HiPE).
HiPE = 11,
// WebKit JS - Calling convention for stack based JavaScript calls
WebKit_JS = 12,
// AnyReg - Calling convention for dynamic register based calls (e.g.
// stackmap and patchpoint intrinsics).
AnyReg = 13,
// PreserveMost - Calling convention for runtime calls that preserves most
// registers.
PreserveMost = 14,
// PreserveAll - Calling convention for runtime calls that preserves
// (almost) all registers.
PreserveAll = 15,
// 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,
/// ARM_APCS - ARM Procedure Calling Standard calling convention (obsolete,
/// but still used on some targets).
ARM_APCS = 66,
/// ARM_AAPCS - ARM Architecture Procedure Calling Standard calling
/// convention (aka EABI). Soft float variant.
ARM_AAPCS = 67,
/// ARM_AAPCS_VFP - Same as ARM_AAPCS, but uses hard floating point ABI.
ARM_AAPCS_VFP = 68,
/// MSP430_INTR - Calling convention used for MSP430 interrupt routines.
MSP430_INTR = 69,
/// X86_ThisCall - Similar to X86_StdCall. Passes first argument in ECX,
/// others via stack. Callee is responsible for stack cleaning. MSVC uses
/// this by default for methods in its ABI.
X86_ThisCall = 70,
/// PTX_Kernel - Call to a PTX kernel.
/// Passes all arguments in parameter space.
PTX_Kernel = 71,
/// PTX_Device - Call to a PTX device function.
/// Passes all arguments in register or parameter space.
PTX_Device = 72,
/// SPIR_FUNC - Calling convention for SPIR non-kernel device functions.
/// No lowering or expansion of arguments.
/// Structures are passed as a pointer to a struct with the byval attribute.
/// Functions can only call SPIR_FUNC and SPIR_KERNEL functions.
/// Functions can only have zero or one return values.
/// Variable arguments are not allowed, except for printf.
/// How arguments/return values are lowered are not specified.
/// Functions are only visible to the devices.
SPIR_FUNC = 75,
/// SPIR_KERNEL - Calling convention for SPIR kernel functions.
/// Inherits the restrictions of SPIR_FUNC, except
/// Cannot have non-void return values.
/// Cannot have variable arguments.
/// Can also be called by the host.
/// Is externally visible.
SPIR_KERNEL = 76,
/// Intel_OCL_BI - Calling conventions for Intel OpenCL built-ins
Intel_OCL_BI = 77,
/// \brief The C convention as specified in the x86-64 supplement to the
/// System V ABI, used on most non-Windows systems.
X86_64_SysV = 78,
/// \brief The C convention as implemented on Windows/x86-64. This
/// convention differs from the more common \c X86_64_SysV convention
/// in a number of ways, most notably in that XMM registers used to pass
/// arguments are shadowed by GPRs, and vice versa.
X86_64_Win64 = 79,
/// \brief The calling convention used for __cdecl methods on win32.
/// Differs from the C calling convention only in that the order of the
/// first parameter and the sret parameter are swapped.
X86_CDeclMethod = 80
};
} // End CallingConv namespace
} // End llvm namespace
#endif
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