MIPS: Fix failures on Octane 2.0 zlib benchmark.

src/mips/full-codegen-mips.cc

Index: src/mips/full-codegen-mips.cc
diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index 0407f01c084e1b742173c7d6d397d1c9d73b4b58..a3a3f325c6993dcdd408bca4eccf280a74f6e521 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -631,11 +631,13 @@ void FullCodeGenerator::StackValueContext::Plug(
   Label done;
   __ bind(materialize_true);
   __ LoadRoot(at, Heap::kTrueValueRootIndex);
+  // Push the value as the following branch can clobber at in long branch mode.
+  __ push(at);
   __ Branch(&done);
   __ bind(materialize_false);
   __ LoadRoot(at, Heap::kFalseValueRootIndex);
-  __ bind(&done);
   __ push(at);
+  __ bind(&done);
 }