lib/Target/WebAssembly/WebAssemblyUtilities.h

   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
  18 #include "llvm/CodeGen/MachineBasicBlock.h"
  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