TEST=cctest/test-code-generator/FuzzAssembleMoveAndSwap

Bug: 
Change-Id: I36d0b7df56f3c895a7fd4017e5e9a7cfd0053b2a
Reviewed-on: https://chromium-review.googlesource.com/850399Reviewed-by: Miran Karić <miran.karic@mips.com>
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#50410}