MIPS64: Fix 'MIPS: Fix dd() implementations for compact branches.'

test/cctest/test-macro-assembler-mips64.cc

Index: test/cctest/test-macro-assembler-mips64.cc
diff --git a/test/cctest/test-macro-assembler-mips64.cc b/test/cctest/test-macro-assembler-mips64.cc
index 05a9b90d60d4950adccae7793ba8dfae301ba4bf..684b554236c123d3c3083fda744a7454a6b0f8e8 100644
--- a/test/cctest/test-macro-assembler-mips64.cc
+++ b/test/cctest/test-macro-assembler-mips64.cc
@@ -341,6 +341,9 @@ TEST(jump_tables5) {
     __ jalr(at);
     __ nop();  // Branch delay slot nop.
     __ bc(&done);
+    // A nop instruction must be generated by the forbidden slot guard
+    // (Assembler::dd(Label*)) so the first label goes to an 8 bytes aligned
+    // location.
     for (int i = 0; i < kNumCases; ++i) {
       __ dd(&labels[i]);
     }