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i965/vec4: Do separate copy followed by constant propagation after opt_vector_float().

Browse source 
total instructions in shared programs: 5877012 -> 5876617 (-0.01%)
instructions in affected programs:     33140 -> 32745 (-1.19%)

From before the commit that allows VF constant propagation (which hurt
some programs) to here, the results are:

total instructions in shared programs: 5877951 -> 5876617 (-0.02%)
instructions in affected programs:     123444 -> 122110 (-1.08%)

with no programs hurt.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Matt Turner 2014-12-20 18:02:29 -08:00
parent d61c519822
commit 798c094e62
1 changed files with 2 additions and 1 deletions
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3
src/mesa/drivers/dri/i965/brw_vec4.cpp
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@ -1800,7 +1800,8 @@ vec4_visitor::run()
if (opt_vector_float()) {
opt_cse();
opt_copy_propagation();
opt_copy_propagation(false);
opt_copy_propagation(true);
dead_code_eliminate();
}