[WebAssembly] Add exception handling option

Summary: Add exception handling option to clang.

Reviewers: dschuff

Subscribers: jfb, sbc100, jgravelle-google, sunfish, cfe-commits

Differential Revision: https://reviews.llvm.org/D43681

llvm-svn: 326517

2 files changed, 11 insertions, 1 deletions

diff --git a/clang/lib/Basic/Targets/WebAssembly.cpp b/clang/lib/Basic/Targets/WebAssembly.cpp
index 4338d03ade0..b8a2a092aff 100644
--- a/clang/lib/Basic/Targets/WebAssembly.cpp
+++ b/clang/lib/Basic/Targets/WebAssembly.cpp
@@ -37,6 +37,7 @@ bool WebAssemblyTargetInfo::hasFeature(StringRef Feature) const {
       .Case("simd128", SIMDLevel >= SIMD128)
       .Case("nontrapping-fptoint", HasNontrappingFPToInt)
       .Case("sign-ext", HasSignExt)
+      .Case("exception-handling", HasExceptionHandling)
       .Default(false);
 }
 
@@ -83,6 +84,14 @@ bool WebAssemblyTargetInfo::handleTargetFeatures(
       HasSignExt = false;
       continue;
     }
+    if (Feature == "+exception-handling") {
+      HasExceptionHandling = true;
+      continue;
+    }
+    if (Feature == "-exception-handling") {
+      HasExceptionHandling = false;
+      continue;
+    }
 
     Diags.Report(diag::err_opt_not_valid_with_opt)
         << Feature << "-target-feature";
diff --git a/clang/lib/Basic/Targets/WebAssembly.h b/clang/lib/Basic/Targets/WebAssembly.h
index 305463cd3c7..b0e466b8d8c 100644
--- a/clang/lib/Basic/Targets/WebAssembly.h
+++ b/clang/lib/Basic/Targets/WebAssembly.h
@@ -32,11 +32,12 @@ class LLVM_LIBRARY_VISIBILITY WebAssemblyTargetInfo : public TargetInfo {
 
   bool HasNontrappingFPToInt;
   bool HasSignExt;
+  bool HasExceptionHandling;
 
 public:
   explicit WebAssemblyTargetInfo(const llvm::Triple &T, const TargetOptions &)
       : TargetInfo(T), SIMDLevel(NoSIMD), HasNontrappingFPToInt(false),
-        HasSignExt(false) {
+        HasSignExt(false), HasExceptionHandling(false) {
     NoAsmVariants = true;
     SuitableAlign = 128;
     LargeArrayMinWidth = 128;