MIPS: Fix failures on Octane 2.0 zlib benchmark.

The bug was introduced in af9504e.

The zlib benchmark triggers long branch mode on MIPS, in which
at register is clobbered after every branch.

TEST=benchmarks/octane/zlib
BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/95203005

Patch from Dusan Milosavljevic <Dusan.Milosavljevic@rt-rk.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18168 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index 35fbad0..a56fbb1 100644 (file)
--- 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);
 }