tree 852607e608ed6e771f657f30a972e879ecf226b4
parent 26012c16737a8542316062ef17fa9a0b34e274b7
author Matt Turner <mattst88@gmail.com> 1395874692 -0700
committer Matt Turner <mattst88@gmail.com> 1396716294 -0700

i965/fs: Name temporary ralloc contexts something other than mem_ctx.

Or else poor programmers might mistakenly use the temporary mem_ctx,
instead of the fs_visitor's mem_ctx and wonder why their code is
crashing.

Also remove the parenting. These contexts are local to the optimization
passes they're in and are freed at the end.