1 files changed, 51 insertions, 0 deletions
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyUtilities.h b/llvm/lib/Target/WebAssembly/WebAssemblyUtilities.h
new file mode 100644
index 000000000000..26cf84de89b9
--- /dev/null
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyUtilities.h
@@ -0,0 +1,51 @@
+//===-- WebAssemblyUtilities - WebAssembly Utility Functions ---*- C++ -*-====//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file contains the declaration of the WebAssembly-specific
+/// utility functions.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYUTILITIES_H
+#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYUTILITIES_H
+
+#include "llvm/CodeGen/MachineBasicBlock.h"
+
+namespace llvm {
+
+class WebAssemblyFunctionInfo;
+
+namespace WebAssembly {
+
+bool isChild(const MachineInstr &MI, const WebAssemblyFunctionInfo &MFI);
+bool mayThrow(const MachineInstr &MI);
+
+// Exception-related function names
+extern const char *const ClangCallTerminateFn;
+extern const char *const CxaBeginCatchFn;
+extern const char *const CxaRethrowFn;
+extern const char *const StdTerminateFn;
+extern const char *const PersonalityWrapperFn;
+
+/// Return the "bottom" block of an entity, which can be either a MachineLoop or
+/// WebAssemblyException. This differs from MachineLoop::getBottomBlock in that
+/// it works even if the entity is discontiguous.
+template <typename T> MachineBasicBlock *getBottom(const T *Unit) {
+  MachineBasicBlock *Bottom = Unit->getHeader();
+  for (MachineBasicBlock *MBB : Unit->blocks())
+    if (MBB->getNumber() > Bottom->getNumber())
+      Bottom = MBB;
+  return Bottom;
+}
+
+} // end namespace WebAssembly
+
+} // end namespace llvm
+
+#endif