diff options
author | Kenneth Graunke <[email protected]> | 2013-04-03 23:56:57 -0700 |
---|---|---|
committer | Kenneth Graunke <[email protected]> | 2013-04-04 15:38:19 -0700 |
commit | edc52a8f280db8d9dc9a04314741319ea8b83e67 (patch) | |
tree | ae9866c0c13ccfec896c5dd1ed433ad22956cced /docs/MESA_window_pos.spec | |
parent | 967514ce680f7bf785ab544c6174786dd20425de (diff) |
glsl: Add an optimization pass to flatten simple nested if blocks.
GLBenchmark 2.7's shaders contain conditional blocks like:
if (x) {
if (y) {
...
}
}
where the outer conditional's then clause contains exactly one statement
(the nested if) and there are no else clauses. This can easily be
optimized into:
if (x && y) {
...
}
This saves a few instructions in GLBenchmark 2.7:
total instructions in shared programs: 11833 -> 11649 (-1.55%)
instructions in affected programs: 8234 -> 8050 (-2.23%)
It also helps CS:GO slightly (-0.05%/-0.22%). More importantly,
however, it simplifies the control flow graph, which could enable other
optimizations.
Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Diffstat (limited to 'docs/MESA_window_pos.spec')
0 files changed, 0 insertions, 0 deletions