[wasm] Use uint32_t instead of unsigned

The style guide says that only `int` should be used of the builtin
integer types. Instead, we should use the stdint types.

See https://google.github.io/styleguide/cppguide.html#Integer_Types

Change-Id: I1af53a3bceefbfed85589b74a602c8ebe1c7ee25
Reviewed-on: https://chromium-review.googlesource.com/c/1342663Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Ben Smith <binji@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57851}

src/wasm/function-body-decoder.cc

@@ -203,7 +203,7 @@ bool PrintRawWasmCode(AccountingAllocator* allocator, const FunctionBody& body,
                                                      i.pc());
         os << "   // @" << i.pc_offset();
         if (decoder.Complete(imm)) {
-          for (unsigned i = 0; i < imm.out_arity(); i++) {
+          for (uint32_t i = 0; i < imm.out_arity(); i++) {
             os << " " << ValueTypes::TypeName(imm.out_type(i));
           }
         }

src/wasm/graph-builder-interface.cc

@@ -157,7 +157,7 @@ class WasmGraphBuildingInterface {
     ssa_env_->SetNotMerged();
     if (!decoder->ok()) return;
     // Wrap input merge into phis.
-    for (unsigned i = 0; i < block->start_merge.arity; ++i) {
+    for (uint32_t i = 0; i < block->start_merge.arity; ++i) {
       Value& val = block->start_merge[i];
       val.node = builder_->Phi(val.type, 1, &val.node, block->end_env->control);
     }
@@ -248,7 +248,7 @@ class WasmGraphBuildingInterface {
     for (size_t i = 0; i < num_values; ++i) {
       buffer[i] = values[i].node;
     }
-    BUILD(Return, static_cast<unsigned>(values.size()), buffer);
+    BUILD(Return, static_cast<uint32_t>(values.size()), buffer);
   }
 
   void GetLocal(FullDecoder* decoder, Value* result,

src/wasm/module-decoder.cc

@@ -1305,7 +1305,7 @@ class ModuleDecoderImpl : public Decoder {
     const byte* pos = pc();
     uint8_t opcode = consume_u8("opcode");
     WasmInitExpr expr;
-    unsigned len = 0;
+    uint32_t len = 0;
     switch (opcode) {
       case kExprGetGlobal: {
         GlobalIndexImmediate<Decoder::kValidate> imm(this, pc() - 1);
@@ -1686,7 +1686,7 @@ AsmJsOffsetsResult DecodeAsmJsOffsets(const byte* tables_start,
   Decoder decoder(tables_start, tables_end);
   uint32_t functions_count = decoder.consume_u32v("functions count");
   // Reserve space for the entries, taking care of invalid input.
-  if (functions_count < static_cast<unsigned>(tables_end - tables_start)) {
+  if (functions_count < static_cast<uint32_t>(tables_end - tables_start)) {
     table.reserve(functions_count);
   }
 

src/wasm/wasm-interpreter.cc

@@ -1244,7 +1244,7 @@ class ThreadImpl {
     pc_t pc;
     sp_t sp;
     size_t fp;
-    unsigned arity;
+    uint32_t arity;
   };
 
   friend class InterpretedFrameImpl;