LLVM API Documentation
|LLVM IR allows to use arbitrary numbers as calling convention identifiers. |
C = 0, Fast = 8, Cold = 9, GHC = 10,
HiPE = 11, WebKit_JS = 12, AnyReg = 13, PreserveMost = 14,
PreserveAll = 15, FirstTargetCC = 64, X86_StdCall = 64, X86_FastCall = 65,
ARM_APCS = 66, ARM_AAPCS = 67, ARM_AAPCS_VFP = 68, MSP430_INTR = 69,
X86_ThisCall = 70, PTX_Kernel = 71, PTX_Device = 72, SPIR_FUNC = 75,
SPIR_KERNEL = 76, Intel_OCL_BI = 77, X86_64_SysV = 78, X86_64_Win64 = 79,
X86_VectorCall = 80
|LLVM Calling Convention Representation. More...|
CallingConv Namespace - This namespace contains an enum with a value for the well-known calling conventions.
LLVM Calling Convention Representation.
A set of enums which specify the assigned numeric values for known llvm calling conventions.
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.
Fast - This calling convention attempts to make calls as fast as possible (e.g. by passing things in registers).
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_FastCall - 'fast' analog of X86_StdCall. Passes first two arguments in ECX:EDX registers, others - via stack. Callee is responsible for stack cleaning.
ARM_APCS - ARM Procedure Calling Standard calling convention (obsolete, but still used on some targets).
ARM_AAPCS - ARM Architecture Procedure Calling Standard calling convention (aka EABI). Soft float variant.
ARM_AAPCS_VFP - Same as ARM_AAPCS, but uses hard floating point ABI.
MSP430_INTR - Calling convention used for MSP430 interrupt routines.
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.
PTX_Kernel - Call to a PTX kernel. Passes all arguments in parameter space.
PTX_Device - Call to a PTX device function. Passes all arguments in register or parameter space.
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_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.
Intel_OCL_BI - Calling conventions for Intel OpenCL built-ins.
The C convention as specified in the x86-64 supplement to the System V ABI, used on most non-Windows systems.
The C convention as implemented on Windows/x86-64. This convention differs from the more common
MSVC calling convention that passes vectors and vector aggregates in SSE registers.