LLVM  10.0.0svn
WebAssemblyUtilities.h
Go to the documentation of this file.
1 //===-- WebAssemblyUtilities - WebAssembly Utility Functions ---*- C++ -*-====//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 ///
9 /// \file
10 /// This file contains the declaration of the WebAssembly-specific
11 /// utility functions.
12 ///
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYUTILITIES_H
16 #define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYUTILITIES_H
17 
19 
20 namespace llvm {
21 
22 class WebAssemblyFunctionInfo;
23 
24 namespace WebAssembly {
25 
26 bool isChild(const MachineInstr &MI, const WebAssemblyFunctionInfo &MFI);
27 bool mayThrow(const MachineInstr &MI);
28 
29 // Exception-related function names
30 extern const char *const ClangCallTerminateFn;
31 extern const char *const CxaBeginCatchFn;
32 extern const char *const CxaRethrowFn;
33 extern const char *const StdTerminateFn;
34 extern const char *const PersonalityWrapperFn;
35 
36 /// Return the "bottom" block of an entity, which can be either a MachineLoop or
37 /// WebAssemblyException. This differs from MachineLoop::getBottomBlock in that
38 /// it works even if the entity is discontiguous.
39 template <typename T> MachineBasicBlock *getBottom(const T *Unit) {
40  MachineBasicBlock *Bottom = Unit->getHeader();
41  for (MachineBasicBlock *MBB : Unit->blocks())
42  if (MBB->getNumber() > Bottom->getNumber())
43  Bottom = MBB;
44  return Bottom;
45 }
46 
47 } // end namespace WebAssembly
48 
49 } // end namespace llvm
50 
51 #endif
This class represents lattice values for constants.
Definition: AllocatorList.h:23
bool mayThrow(const MachineInstr &MI)
const char *const CxaBeginCatchFn
const char *const StdTerminateFn
int getNumber() const
MachineBasicBlocks are uniquely numbered at the function level, unless they&#39;re not in a MachineFuncti...
const char *const CxaRethrowFn
const char *const ClangCallTerminateFn
const char *const PersonalityWrapperFn
MachineBasicBlock * getBottom(const T *Unit)
Return the "bottom" block of an entity, which can be either a MachineLoop or WebAssemblyException.
IRTranslator LLVM IR MI
bool isChild(const MachineInstr &MI, const WebAssemblyFunctionInfo &MFI)
Test whether MI is a child of some other node in an expression tree.