[wasm] Fix indentation when printing exception expressions.

R=herhut@chromium.org
BUG=v8:8091

Change-Id: Ia4353dff0726a4c317c8e5e41617d93df193705f
Reviewed-on: https://chromium-review.googlesource.com/c/1375849Reviewed-by: Stephan Herhut <herhut@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58225}

src/wasm/function-body-decoder.cc

@@ -152,7 +152,10 @@ bool PrintRawWasmCode(AccountingAllocator* allocator, const FunctionBody& body,
 
     WasmOpcode opcode = i.current();
     if (line_numbers) line_numbers->push_back(i.position());
-    if (opcode == kExprElse) control_depth--;
+    if (opcode == kExprElse || opcode == kExprCatch ||
+        opcode == kExprCatchAll) {
+      control_depth--;
+    }
 
     int num_whitespaces = control_depth < 32 ? 2 * control_depth : 64;
 
@@ -192,6 +195,8 @@ bool PrintRawWasmCode(AccountingAllocator* allocator, const FunctionBody& body,
 
     switch (opcode) {
       case kExprElse:
+      case kExprCatch:
+      case kExprCatchAll:
         os << "   // @" << i.pc_offset();
         control_depth++;
         break;

src/wasm/wasm-text.cc

@@ -81,7 +81,10 @@ void PrintWasmText(const WasmModule* module, const ModuleWireBytes& wire_bytes,
 
   for (; i.has_next(); i.next()) {
     WasmOpcode opcode = i.current();
-    if (opcode == kExprElse || opcode == kExprEnd) --control_depth;
+    if (opcode == kExprElse || opcode == kExprCatch ||
+        opcode == kExprCatchAll || opcode == kExprEnd) {
+      --control_depth;
+    }
 
     DCHECK_LE(0, control_depth);
     const int kMaxIndentation = 64;
@@ -118,7 +121,8 @@ void PrintWasmText(const WasmModule* module, const ModuleWireBytes& wire_bytes,
         break;
       }
       case kExprElse:
-        os << "else";
+      case kExprCatchAll:
+        os << WasmOpcodes::OpcodeName(opcode);
         control_depth++;
         break;
       case kExprEnd:
@@ -149,8 +153,10 @@ void PrintWasmText(const WasmModule* module, const ModuleWireBytes& wire_bytes,
         os << WasmOpcodes::OpcodeName(opcode) << ' ' << imm.index;
         break;
       }
-      case kExprThrow:
-      case kExprCatch: {
+      case kExprCatch:
+        control_depth++;
+        V8_FALLTHROUGH;
+      case kExprThrow: {
         ExceptionIndexImmediate<Decoder::kNoValidate> imm(&i, i.pc());
         os << WasmOpcodes::OpcodeName(opcode) << ' ' << imm.index;
         break;