• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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_CALLINGCONV_H
15 #define LLVM_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     // Target - This is the start of the target-specific calling conventions,
51     // e.g. fastcall and thiscall on X86.
52     FirstTargetCC = 64,
53 
54     /// X86_StdCall - stdcall is the calling conventions mostly used by the
55     /// Win32 API. It is basically the same as the C convention with the
56     /// difference in that the callee is responsible for popping the arguments
57     /// from the stack.
58     X86_StdCall = 64,
59 
60     /// X86_FastCall - 'fast' analog of X86_StdCall. Passes first two arguments
61     /// in ECX:EDX registers, others - via stack. Callee is responsible for
62     /// stack cleaning.
63     X86_FastCall = 65,
64 
65     /// ARM_APCS - ARM Procedure Calling Standard calling convention (obsolete,
66     /// but still used on some targets).
67     ARM_APCS = 66,
68 
69     /// ARM_AAPCS - ARM Architecture Procedure Calling Standard calling
70     /// convention (aka EABI). Soft float variant.
71     ARM_AAPCS = 67,
72 
73     /// ARM_AAPCS_VFP - Same as ARM_AAPCS, but uses hard floating point ABI.
74     ARM_AAPCS_VFP = 68,
75 
76     /// MSP430_INTR - Calling convention used for MSP430 interrupt routines.
77     MSP430_INTR = 69,
78 
79     /// X86_ThisCall - Similar to X86_StdCall. Passes first argument in ECX,
80     /// others via stack. Callee is responsible for stack cleaning. MSVC uses
81     /// this by default for methods in its ABI.
82     X86_ThisCall = 70,
83 
84     /// PTX_Kernel - Call to a PTX kernel.
85     /// Passes all arguments in parameter space.
86     PTX_Kernel = 71,
87 
88     /// PTX_Device - Call to a PTX device function.
89     /// Passes all arguments in register or parameter space.
90     PTX_Device = 72,
91 
92     /// MBLAZE_INTR - Calling convention used for MBlaze interrupt routines.
93     MBLAZE_INTR = 73,
94 
95     /// MBLAZE_INTR - Calling convention used for MBlaze interrupt support
96     /// routines (i.e. GCC's save_volatiles attribute).
97     MBLAZE_SVOL = 74
98   };
99 } // End CallingConv namespace
100 
101 } // End llvm namespace
102 
103 #endif
104