1 //===-- llvm/CallingConv.h - LLVM Calling Conventions -----------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines LLVM's set of calling conventions. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_IR_CALLINGCONV_H 15 #define LLVM_IR_CALLINGCONV_H 16 17 namespace llvm { 18 19 /// CallingConv Namespace - This namespace contains an enum with a value for 20 /// the well-known calling conventions. 21 /// 22 namespace CallingConv { 23 /// LLVM IR allows to use arbitrary numbers as calling convention identifiers. 24 typedef unsigned ID; 25 26 /// A set of enums which specify the assigned numeric values for known llvm 27 /// calling conventions. 28 /// @brief LLVM Calling Convention Representation 29 enum { 30 /// C - The default llvm calling convention, compatible with C. This 31 /// convention is the only calling convention that supports varargs calls. 32 /// As with typical C calling conventions, the callee/caller have to 33 /// tolerate certain amounts of prototype mismatch. 34 C = 0, 35 36 // Generic LLVM calling conventions. None of these calling conventions 37 // support varargs calls, and all assume that the caller and callee 38 // prototype exactly match. 39 40 /// Fast - This calling convention attempts to make calls as fast as 41 /// possible (e.g. by passing things in registers). 42 Fast = 8, 43 44 // Cold - This calling convention attempts to make code in the caller as 45 // efficient as possible under the assumption that the call is not commonly 46 // executed. As such, these calls often preserve all registers so that the 47 // call does not break any live ranges in the caller side. 48 Cold = 9, 49 50 // GHC - Calling convention used by the Glasgow Haskell Compiler (GHC). 51 GHC = 10, 52 53 // HiPE - Calling convention used by the High-Performance Erlang Compiler 54 // (HiPE). 55 HiPE = 11, 56 57 // WebKit JS - Calling convention for stack based JavaScript calls 58 WebKit_JS = 12, 59 60 // AnyReg - Calling convention for dynamic register based calls (e.g. 61 // stackmap and patchpoint intrinsics). 62 AnyReg = 13, 63 64 // PreserveMost - Calling convention for runtime calls that preserves most 65 // registers. 66 PreserveMost = 14, 67 68 // PreserveAll - Calling convention for runtime calls that preserves 69 // (almost) all registers. 70 PreserveAll = 15, 71 72 // Swift - Calling convention for Swift. 73 Swift = 16, 74 75 // CXX_FAST_TLS - Calling convention for access functions. 76 CXX_FAST_TLS = 17, 77 78 // Target - This is the start of the target-specific calling conventions, 79 // e.g. fastcall and thiscall on X86. 80 FirstTargetCC = 64, 81 82 /// X86_StdCall - stdcall is the calling conventions mostly used by the 83 /// Win32 API. It is basically the same as the C convention with the 84 /// difference in that the callee is responsible for popping the arguments 85 /// from the stack. 86 X86_StdCall = 64, 87 88 /// X86_FastCall - 'fast' analog of X86_StdCall. Passes first two arguments 89 /// in ECX:EDX registers, others - via stack. Callee is responsible for 90 /// stack cleaning. 91 X86_FastCall = 65, 92 93 /// ARM_APCS - ARM Procedure Calling Standard calling convention (obsolete, 94 /// but still used on some targets). 95 ARM_APCS = 66, 96 97 /// ARM_AAPCS - ARM Architecture Procedure Calling Standard calling 98 /// convention (aka EABI). Soft float variant. 99 ARM_AAPCS = 67, 100 101 /// ARM_AAPCS_VFP - Same as ARM_AAPCS, but uses hard floating point ABI. 102 ARM_AAPCS_VFP = 68, 103 104 /// MSP430_INTR - Calling convention used for MSP430 interrupt routines. 105 MSP430_INTR = 69, 106 107 /// X86_ThisCall - Similar to X86_StdCall. Passes first argument in ECX, 108 /// others via stack. Callee is responsible for stack cleaning. MSVC uses 109 /// this by default for methods in its ABI. 110 X86_ThisCall = 70, 111 112 /// PTX_Kernel - Call to a PTX kernel. 113 /// Passes all arguments in parameter space. 114 PTX_Kernel = 71, 115 116 /// PTX_Device - Call to a PTX device function. 117 /// Passes all arguments in register or parameter space. 118 PTX_Device = 72, 119 120 /// SPIR_FUNC - Calling convention for SPIR non-kernel device functions. 121 /// No lowering or expansion of arguments. 122 /// Structures are passed as a pointer to a struct with the byval attribute. 123 /// Functions can only call SPIR_FUNC and SPIR_KERNEL functions. 124 /// Functions can only have zero or one return values. 125 /// Variable arguments are not allowed, except for printf. 126 /// How arguments/return values are lowered are not specified. 127 /// Functions are only visible to the devices. 128 SPIR_FUNC = 75, 129 130 /// SPIR_KERNEL - Calling convention for SPIR kernel functions. 131 /// Inherits the restrictions of SPIR_FUNC, except 132 /// Cannot have non-void return values. 133 /// Cannot have variable arguments. 134 /// Can also be called by the host. 135 /// Is externally visible. 136 SPIR_KERNEL = 76, 137 138 /// Intel_OCL_BI - Calling conventions for Intel OpenCL built-ins 139 Intel_OCL_BI = 77, 140 141 /// \brief The C convention as specified in the x86-64 supplement to the 142 /// System V ABI, used on most non-Windows systems. 143 X86_64_SysV = 78, 144 145 /// \brief The C convention as implemented on Windows/x86-64. This 146 /// convention differs from the more common \c X86_64_SysV convention 147 /// in a number of ways, most notably in that XMM registers used to pass 148 /// arguments are shadowed by GPRs, and vice versa. 149 X86_64_Win64 = 79, 150 151 /// \brief MSVC calling convention that passes vectors and vector aggregates 152 /// in SSE registers. 153 X86_VectorCall = 80, 154 155 /// \brief Calling convention used by HipHop Virtual Machine (HHVM) to 156 /// perform calls to and from translation cache, and for calling PHP 157 /// functions. 158 /// HHVM calling convention supports tail/sibling call elimination. 159 HHVM = 81, 160 161 /// \brief HHVM calling convention for invoking C/C++ helpers. 162 HHVM_C = 82, 163 164 /// X86_INTR - x86 hardware interrupt context. Callee may take one or two 165 /// parameters, where the 1st represents a pointer to hardware context frame 166 /// and the 2nd represents hardware error code, the presence of the later 167 /// depends on the interrupt vector taken. Valid for both 32- and 64-bit 168 /// subtargets. 169 X86_INTR = 83, 170 171 /// Used for AVR interrupt routines. 172 AVR_INTR = 84, 173 174 /// Calling convention used for AVR signal routines. 175 AVR_SIGNAL = 85, 176 177 /// Calling convention used for special AVR rtlib functions 178 /// which have an "optimized" convention to preserve registers. 179 AVR_BUILTIN = 86, 180 181 /// Calling convention used for Mesa vertex shaders. 182 AMDGPU_VS = 87, 183 184 /// Calling convention used for Mesa geometry shaders. 185 AMDGPU_GS = 88, 186 187 /// Calling convention used for Mesa pixel shaders. 188 AMDGPU_PS = 89, 189 190 /// Calling convention used for Mesa compute shaders. 191 AMDGPU_CS = 90, 192 193 /// Calling convention for AMDGPU code object kernels. 194 AMDGPU_KERNEL = 91, 195 196 /// The highest possible calling convention ID. Must be some 2^k - 1. 197 MaxID = 1023 198 }; 199 } // End CallingConv namespace 200 201 } // End llvm namespace 202 203 #endif 204
