MIPS: Critical fix for label binding in RegExp engine when trampoline is emitted.

src/mips/regexp-macro-assembler-mips.cc

Index: src/mips/regexp-macro-assembler-mips.cc
diff --git a/src/mips/regexp-macro-assembler-mips.cc b/src/mips/regexp-macro-assembler-mips.cc
index 036cbb13e4ffad52c284744f3cd46393e48d8c7c..2fbc0eaa5641de6009f7d5d63c02e0f5583faf24 100644
--- a/src/mips/regexp-macro-assembler-mips.cc
+++ b/src/mips/regexp-macro-assembler-mips.cc
@@ -1005,6 +1005,7 @@ void RegExpMacroAssemblerMIPS::PushBacktrack(Label* label) {
     int target = label->pos();
     __ li(a0, Operand(target + Code::kHeaderSize - kHeapObjectTag));
   } else {
+    Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_);
     Label after_constant;
     __ Branch(&after_constant);
     int offset = masm_->pc_offset();