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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 {
+
+ /// LLVM IR allows to use arbitrary numbers as calling convention identifiers.
+ using ID = unsigned;
+
+ /// 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 and
+ /// AArch64. 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.
+ /// On AArch64, this is identical to the normal C (AAPCS) calling
+ /// convention for normal functions, but floats are passed in integer
+ /// registers to variadic functions.
+ 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,
+
+ /// Used for AVR interrupt routines.
+ AVR_INTR = 84,
+
+ /// Calling convention used for AVR signal routines.
+ AVR_SIGNAL = 85,
+
+ /// Calling convention used for special AVR rtlib functions
+ /// which have an "optimized" convention to preserve registers.
+ AVR_BUILTIN = 86,
+
+ /// Calling convention used for Mesa vertex shaders, or AMDPAL last shader
+ /// stage before rasterization (vertex shader if tessellation and geometry
+ /// are not in use, or otherwise copy shader if one is needed).
+ AMDGPU_VS = 87,
+
+ /// Calling convention used for Mesa/AMDPAL geometry shaders.
+ AMDGPU_GS = 88,
+
+ /// Calling convention used for Mesa/AMDPAL pixel shaders.
+ AMDGPU_PS = 89,
+
+ /// Calling convention used for Mesa/AMDPAL compute shaders.
+ AMDGPU_CS = 90,
+
+ /// Calling convention for AMDGPU code object kernels.
+ AMDGPU_KERNEL = 91,
+
+ /// Register calling convention used for parameters transfer optimization
+ X86_RegCall = 92,
+
+ /// Calling convention used for Mesa/AMDPAL hull shaders (= tessellation
+ /// control shaders).
+ AMDGPU_HS = 93,
+
+ /// Calling convention used for special MSP430 rtlib functions
+ /// which have an "optimized" convention using additional registers.
+ MSP430_BUILTIN = 94,
+
+ /// Calling convention used for AMDPAL vertex shader if tessellation is in
+ /// use.
+ AMDGPU_LS = 95,
+
+ /// Calling convention used for AMDPAL shader stage before geometry shader
+ /// if geometry is in use. So either the domain (= tessellation evaluation)
+ /// shader if tessellation is in use, or otherwise the vertex shader.
+ AMDGPU_ES = 96,
+
+ /// The highest possible calling convention ID. Must be some 2^k - 1.
+ MaxID = 1023
+ };
+
+} // end namespace CallingConv
+
+} // end namespace llvm
+
+#endif // LLVM_IR_CALLINGCONV_H