Bug b/37495545

Test: New tests pass
Change-Id: Icc81729d8c65aadccdd685490218d298e671b638
Reviewed-on: https://swiftshader-review.googlesource.com/12768Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Casey Dahlin <sadmac@google.com>