Support blocks in asm->wasm global section.

src/wasm/asm-wasm-builder.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/wasm/asm-wasm-builder.h"
 #include "src/wasm/wasm-macro-gen.h"
 #include "src/wasm/wasm-opcodes.h"
 
@@ skipping 92 matching lines @@
     if (stmt->statements()->length() == 1) {
       ExpressionStatement* expr =
           stmt->statements()->at(0)->AsExpressionStatement();
       if (expr != nullptr) {
         if (expr->expression()->IsAssignment()) {
           RECURSE(VisitExpressionStatement(expr));
           return;
         }
       }
     }
-    DCHECK(in_function_);
-    BlockVisitor visitor(this, stmt->AsBreakableStatement(), kExprBlock, false,
-                         static_cast<byte>(stmt->statements()->length()));
-    RECURSE(VisitStatements(stmt->statements()));
-    DCHECK(block_size_ >= 0);
+    if (in_function_) {
+      BlockVisitor visitor(this, stmt->AsBreakableStatement(), kExprBlock,
+                           false,
+                           static_cast<byte>(stmt->statements()->length()));
+      RECURSE(VisitStatements(stmt->statements()));
+      DCHECK(block_size_ >= 0);
+    } else {
+      RECURSE(VisitStatements(stmt->statements()));
+    }
   }
 
   class BlockVisitor {
    private:
     int prev_block_size_;
     uint32_t index_;
     AsmWasmBuilderImpl* builder_;
 
    public:
     BlockVisitor(AsmWasmBuilderImpl* builder, BreakableStatement* stmt,
@@ skipping 1156 matching lines @@
 // that zone in constructor may be thrown away once wasm module is written.
 WasmModuleIndex* AsmWasmBuilder::Run() {
   AsmWasmBuilderImpl impl(isolate_, zone_, literal_, foreign_);
   impl.Compile();
   WasmModuleWriter* writer = impl.builder_->Build(zone_);
   return writer->WriteTo(zone_);
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8