diff options
| author | Eric Anholt <[email protected]> | 2013-10-17 10:28:40 -0700 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2013-11-01 10:25:33 -0700 |
| commit | fd05ede0d05ee896cf07e2f690ddb42567f9f606 (patch) | |
| tree | c6af3f15dfb1c1172c9d26d645cb88ef7b488b21 /src/glsl/ir_optimization.h | |
| parent | 3641b97bdce558d980799b00422c6aee7d472cf5 (diff) | |
glsl: Add a CSE pass.
This only operates on constant/uniform values for now, because otherwise I'd
have to deal with killing my available CSE entries when assignments happen,
and getting even this working in the tree ir was painful enough.
As is, it has the following effect in shader-db:
total instructions in shared programs: 1524077 -> 1521964 (-0.14%)
instructions in affected programs: 50629 -> 48516 (-4.17%)
GAINED: 0
LOST: 0
And, for tropics, that accounts for most of the effect, the FPS
improvement is 11.67% +/- 0.72% (n=3).
v2: Use read_only field of the variable, manually check the lod_info union
members, use get_num_operands(), rename cse_operands_visitor to
is_cse_candidate_visitor, move all is-a-candidate logic to that
function, and call it before checking for CSE on a given rvalue, more
comments, use private keyword.
Reviewed-by: Paul Berry <[email protected]>
Diffstat (limited to 'src/glsl/ir_optimization.h')
| -rw-r--r-- | src/glsl/ir_optimization.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/glsl/ir_optimization.h b/src/glsl/ir_optimization.h index 074686c5d65..3ca9f574453 100644 --- a/src/glsl/ir_optimization.h +++ b/src/glsl/ir_optimization.h @@ -77,6 +77,7 @@ bool do_constant_variable_unlinked(exec_list *instructions); bool do_copy_propagation(exec_list *instructions); bool do_copy_propagation_elements(exec_list *instructions); bool do_constant_propagation(exec_list *instructions); +bool do_cse(exec_list *instructions); void do_dead_builtin_varyings(struct gl_context *ctx, gl_shader *producer, gl_shader *consumer, unsigned num_tfeedback_decls, |