[wasm] Initial commit for the Int64Reducer.

src/wasm/wasm-opcodes.cc

Index: src/wasm/wasm-opcodes.cc
diff --git a/src/wasm/wasm-opcodes.cc b/src/wasm/wasm-opcodes.cc
index a609e032611ce8633ee5c148882dfb0df9503e50..b3f6e5ecfff9e376e69a371ecb6742981045e125 100644
--- a/src/wasm/wasm-opcodes.cc
+++ b/src/wasm/wasm-opcodes.cc
@@ -97,7 +97,7 @@ bool WasmOpcodes::IsSupported(WasmOpcode opcode) {
     case kExprI64DivU:
     case kExprI64RemS:
     case kExprI64RemU:
-    case kExprI64And:
+    // case kExprI64And:

[titzer, 2016/02/02 10:14:35]

Just remove them

[ahaas, 2016/02/02 13:32:48]

Apparently some tests fail if I remove the instructions here already. We have to
wait until locals are supported (and maybe other stuff like function calls).

     case kExprI64Ior:
     case kExprI64Xor:
     case kExprI64Shl:
@@ -114,7 +114,7 @@ bool WasmOpcodes::IsSupported(WasmOpcode opcode) {
     case kExprI64GtU:
     case kExprI64GeU:
 
-    case kExprI32ConvertI64:
+    // case kExprI32ConvertI64:
     case kExprI64SConvertI32:
     case kExprI64UConvertI32: