i965/cfg: Track prev_block and prev_inst explicitly in the whole function
authorIan Romanick <ian.d.romanick@intel.com>
Thu, 25 Feb 2016 03:26:13 +0000 (19:26 -0800)
committerIan Romanick <ian.d.romanick@intel.com>
Sat, 27 Feb 2016 00:51:27 +0000 (16:51 -0800)
commitc7deee69ea6f64ea5b563985bf19d9deebe73b5b
tree68a7d3e931d8ee1c1f46430b9a088ed0d94ce572
parent70cf0eb5c72c8115b1d2fe6532c97640b4043c0c
i965/cfg: Track prev_block and prev_inst explicitly in the whole function

This provides a trivial simplification now, and it makes some future
changes more straight forward.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
src/mesa/drivers/dri/i965/brw_dead_control_flow.cpp