//===-- 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 { /// LLVM IR allows to use arbitrary numbers as calling convention identifiers. typedef unsigned ID; /// A set of enums which specify the assigned numeric values for known llvm /// calling conventions. /// @brief LLVM Calling Convention Representation enum { /// 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, // Swift - Calling convention for Swift. Swift = 16, // CXX_FAST_TLS - Calling convention for access functions. CXX_FAST_TLS = 17, // 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 MSVC calling convention that passes vectors and vector aggregates /// in SSE registers. X86_VectorCall = 80, /// \brief Calling convention used by HipHop Virtual Machine (HHVM) to /// perform calls to and from translation cache, and for calling PHP /// functions. /// HHVM calling convention supports tail/sibling call elimination. HHVM = 81, /// \brief HHVM calling convention for invoking C/C++ helpers. HHVM_C = 82, /// X86_INTR - x86 hardware interrupt context. Callee may take one or two /// parameters, where the 1st represents a pointer to hardware context frame /// and the 2nd represents hardware error code, the presence of the later /// depends on the interrupt vector taken. Valid for both 32- and 64-bit /// subtargets. X86_INTR = 83, /// The highest possible calling convention ID. Must be some 2^k - 1. MaxID = 1023 }; } // End CallingConv namespace } // End llvm namespace #endif