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 /// A set of enums which specify the assigned numeric values for known llvm 24 /// calling conventions. 25 /// @brief LLVM Calling Convention Representation 26 enum ID { 27 /// C - The default llvm calling convention, compatible with C. This 28 /// convention is the only calling convention that supports varargs calls. 29 /// As with typical C calling conventions, the callee/caller have to 30 /// tolerate certain amounts of prototype mismatch. 31 C = 0, 32 33 // Generic LLVM calling conventions. None of these calling conventions 34 // support varargs calls, and all assume that the caller and callee 35 // prototype exactly match. 36 37 /// Fast - This calling convention attempts to make calls as fast as 38 /// possible (e.g. by passing things in registers). 39 Fast = 8, 40 41 // Cold - This calling convention attempts to make code in the caller as 42 // efficient as possible under the assumption that the call is not commonly 43 // executed. As such, these calls often preserve all registers so that the 44 // call does not break any live ranges in the caller side. 45 Cold = 9, 46 47 // GHC - Calling convention used by the Glasgow Haskell Compiler (GHC). 48 GHC = 10, 49 50 // HiPE - Calling convention used by the High-Performance Erlang Compiler 51 // (HiPE). 52 HiPE = 11, 53 54 // WebKit JS - Calling convention for stack based JavaScript calls 55 WebKit_JS = 12, 56 57 // AnyReg - Calling convention for dynamic register based calls (e.g. 58 // stackmap and patchpoint intrinsics). 59 AnyReg = 13, 60 61 // PreserveMost - Calling convention for runtime calls that preserves most 62 // registers. 63 PreserveMost = 14, 64 65 // PreserveAll - Calling convention for runtime calls that preserves 66 // (almost) all registers. 67 PreserveAll = 15, 68 69 // Target - This is the start of the target-specific calling conventions, 70 // e.g. fastcall and thiscall on X86. 71 FirstTargetCC = 64, 72 73 /// X86_StdCall - stdcall is the calling conventions mostly used by the 74 /// Win32 API. It is basically the same as the C convention with the 75 /// difference in that the callee is responsible for popping the arguments 76 /// from the stack. 77 X86_StdCall = 64, 78 79 /// X86_FastCall - 'fast' analog of X86_StdCall. Passes first two arguments 80 /// in ECX:EDX registers, others - via stack. Callee is responsible for 81 /// stack cleaning. 82 X86_FastCall = 65, 83 84 /// ARM_APCS - ARM Procedure Calling Standard calling convention (obsolete, 85 /// but still used on some targets). 86 ARM_APCS = 66, 87 88 /// ARM_AAPCS - ARM Architecture Procedure Calling Standard calling 89 /// convention (aka EABI). Soft float variant. 90 ARM_AAPCS = 67, 91 92 /// ARM_AAPCS_VFP - Same as ARM_AAPCS, but uses hard floating point ABI. 93 ARM_AAPCS_VFP = 68, 94 95 /// MSP430_INTR - Calling convention used for MSP430 interrupt routines. 96 MSP430_INTR = 69, 97 98 /// X86_ThisCall - Similar to X86_StdCall. Passes first argument in ECX, 99 /// others via stack. Callee is responsible for stack cleaning. MSVC uses 100 /// this by default for methods in its ABI. 101 X86_ThisCall = 70, 102 103 /// PTX_Kernel - Call to a PTX kernel. 104 /// Passes all arguments in parameter space. 105 PTX_Kernel = 71, 106 107 /// PTX_Device - Call to a PTX device function. 108 /// Passes all arguments in register or parameter space. 109 PTX_Device = 72, 110 111 /// SPIR_FUNC - Calling convention for SPIR non-kernel device functions. 112 /// No lowering or expansion of arguments. 113 /// Structures are passed as a pointer to a struct with the byval attribute. 114 /// Functions can only call SPIR_FUNC and SPIR_KERNEL functions. 115 /// Functions can only have zero or one return values. 116 /// Variable arguments are not allowed, except for printf. 117 /// How arguments/return values are lowered are not specified. 118 /// Functions are only visible to the devices. 119 SPIR_FUNC = 75, 120 121 /// SPIR_KERNEL - Calling convention for SPIR kernel functions. 122 /// Inherits the restrictions of SPIR_FUNC, except 123 /// Cannot have non-void return values. 124 /// Cannot have variable arguments. 125 /// Can also be called by the host. 126 /// Is externally visible. 127 SPIR_KERNEL = 76, 128 129 /// Intel_OCL_BI - Calling conventions for Intel OpenCL built-ins 130 Intel_OCL_BI = 77, 131 132 /// \brief The C convention as specified in the x86-64 supplement to the 133 /// System V ABI, used on most non-Windows systems. 134 X86_64_SysV = 78, 135 136 /// \brief The C convention as implemented on Windows/x86-64. This 137 /// convention differs from the more common \c X86_64_SysV convention 138 /// in a number of ways, most notably in that XMM registers used to pass 139 /// arguments are shadowed by GPRs, and vice versa. 140 X86_64_Win64 = 79 141 }; 142 } // End CallingConv namespace 143 144 } // End llvm namespace 145 146 #endif 147
