[turbofan] Add comments to CodeAssembler

src/compiler/mips/code-generator-mips.cc

Index: src/compiler/mips/code-generator-mips.cc
diff --git a/src/compiler/mips/code-generator-mips.cc b/src/compiler/mips/code-generator-mips.cc
index ffc0258ba035582c347f097c77e98a45e9ded722..148c52029dc4b7d7ed540e49bf9925686dbe0496 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -655,6 +655,11 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
     case kArchDebugBreak:
       __ stop("kArchDebugBreak");
       break;
+    case kArchComment: {
+      Address comment_string = i.InputExternalReference(0).address();
+      __ RecordComment(reinterpret_cast<const char*>(comment_string));
+      break;
+    }
     case kArchNop:
     case kArchThrowTerminator:
       // don't emit code for nops.