[WebAssembly] Fixed disassembler not knowing about OPERAND_EVENT

Reviewers: aheejin

Subscribers: dschuff, sbc100, jgravelle-google, sunfish, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58414

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354416 91177308-0d34-0410-b5e6-96231b3b80d8

Author: aardappel

lib/Target/WebAssembly/Disassembler/WebAssemblyDisassembler.cpp

@@ -199,6 +199,7 @@ MCDisassembler::DecodeStatus WebAssemblyDisassembler::getInstruction(
     case WebAssembly::OPERAND_OFFSET32:
     case WebAssembly::OPERAND_P2ALIGN:
     case WebAssembly::OPERAND_TYPEINDEX:
+    case WebAssembly::OPERAND_EVENT:
     case MCOI::OPERAND_IMMEDIATE: {
       if (!parseLEBImmediate(MI, Size, Bytes, false))
         return MCDisassembler::Fail;

test/MC/Disassembler/WebAssembly/wasm.txt

@@ -55,3 +55,6 @@
 # This can mean end_block/end_loop/end_if/end_function/end_try..
 # CHECK: end
 0x0B
+
+# CHECK: br_on_exn 0, 0
+0x0A 0x00 0x00