[WebAssembly] Add exception handling option and feature
Summary:
Add a llc command line option and WebAssembly architecture feature for
exception handling.
Reviewers: dschuff
Subscribers: jfb, sbc100, jgravelle-google, sunfish, llvm-commits
Differential Revision: https://reviews.llvm.org/D43683
llvm-svn: 326004
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
index d38cde7..a686e77 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
@@ -190,7 +190,8 @@
// blocks. Lowering invokes when there is no EH support is done in
// TargetPassConfig::addPassesToHandleExceptions, but this runs after this
// function and SjLj handling expects all invokes to be lowered before.
- if (!EnableEmException) {
+ if (!EnableEmException &&
+ TM->Options.ExceptionModel == ExceptionHandling::None) {
addPass(createLowerInvokePass());
// The lower invoke pass may create unreachable code. Remove it in order not
// to process dead blocks in setjmp/longjmp handling.