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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21744 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
//===-- llvm/CallingConv.h - LLVM Calling Conventions -----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines a set of enums which specify the assigned numeric values
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// for known llvm calling conventions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CALLINGCONV_H
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#define LLVM_CALLINGCONV_H
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namespace llvm {
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/// CallingConv Namespace - This namespace contains an enum with a value for
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/// the well-known calling conventions.
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///
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namespace CallingConv {
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enum ID {
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// C - The default llvm calling convention, compatible with C. This
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// convention is the only calling convention that supports varargs calls.
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// As with typical C calling conventions, the callee/caller have to tolerate
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// certain amounts of prototype mismatch.
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C = 0,
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// Generic LLVM calling conventions. None of these calling conventions
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// support varargs calls, and all assume that the caller and callee
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// prototype exactly match.
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// Fast - This calling convention attempts to make calls as fast as possible
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// (e.g. by passing things in registers).
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Fast = 8,
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// Cold - This calling convention attempts to make code in the caller as
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// efficient as possible under the assumption that the call is not commonly
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// executed. As such, these calls often preserve all registers so that the
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// call does not break any live ranges in the caller side.
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Cold = 9,
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// Target - This is the start of the target-specific calling conventions,
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// e.g. fastcall and thiscall on X86.
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FirstTargetCC = 64,
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};
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} // End CallingConv namespace
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} // End llvm namespace
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#endif
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