[WebAssembly] Refactor WebAssemblyLowerEmscriptenException pass for s…

…etjmp/longjmp

This patch changes the code structure of
WebAssemblyLowerEmscriptenException pass to support both exception
handling and setjmp/longjmp. It also changes the name of the pass and
the source file.

1. Change the file/pass name to WebAssemblyLowerEmscriptenExceptions ->
WebAssemblyLowerEmscriptenEHSjLj to make it clear that it supports both
EH and SjLj
2. List function / global variable names at the top so they
can be changed easily
3. Some cosmetic changes

Patch by Heejin Ahn

Differential Revision: https://reviews.llvm.org/D23588

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279075 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/WebAssembly/CMakeLists.txt

@@ -20,7 +20,7 @@ add_llvm_target(WebAssemblyCodeGen
   WebAssemblyISelLowering.cpp
   WebAssemblyInstrInfo.cpp
   WebAssemblyLowerBrUnless.cpp
-  WebAssemblyLowerEmscriptenExceptions.cpp
+  WebAssemblyLowerEmscriptenEHSjLj.cpp
   WebAssemblyMachineFunctionInfo.cpp
   WebAssemblyMCInstLower.cpp
   WebAssemblyOptimizeLiveIntervals.cpp

lib/Target/WebAssembly/WebAssembly.h

@@ -26,8 +26,8 @@ class ModulePass;
 class FunctionPass;
 
 // LLVM IR passes.
-ModulePass *createWebAssemblyLowerEmscriptenExceptions();
-void initializeWebAssemblyLowerEmscriptenExceptionsPass(PassRegistry &);
+ModulePass *createWebAssemblyLowerEmscriptenEHSjLj(bool DoEH, bool DoSjLj);
+void initializeWebAssemblyLowerEmscriptenEHSjLjPass(PassRegistry &);
 FunctionPass *createWebAssemblyOptimizeReturned();
 
 // ISel and immediate followup passes.