Adding a bunch of profiling tracers.

src/alloy/backend/x64/x64_assembler.cc

@@ -66,6 +66,8 @@ int X64Assembler::Assemble(
     FunctionInfo* symbol_info, HIRBuilder* builder,
     uint32_t debug_info_flags, DebugInfo* debug_info,
     Function** out_function) {
+  SCOPE_profile_cpu_f("alloy");
+
   int result = 0;
 
   // Lower HIR -> x64.

src/alloy/backend/x64/x64_code_cache.cc

@@ -75,6 +75,8 @@ int X64CodeCache::Initialize() {
 
 void* X64CodeCache::PlaceCode(void* machine_code, size_t code_size,
                               size_t stack_size) {
+  SCOPE_profile_cpu_f("alloy");
+
   // Add unwind info into the allocation size. Keep things 16b aligned.
   code_size += XEROUNDUP(X64CodeChunk::UNWIND_INFO_SIZE, 16);
 

src/alloy/backend/x64/x64_emitter.cc

@@ -77,6 +77,8 @@ int X64Emitter::Emit(
     HIRBuilder* builder,
     uint32_t debug_info_flags, runtime::DebugInfo* debug_info,
     void*& out_code_address, size_t& out_code_size) {
+  SCOPE_profile_cpu_f("alloy");
+
   // Reset.
   if (debug_info_flags & DEBUG_INFO_SOURCE_MAP) {
     source_map_count_ = 0;