diff options
| author | Eric Anholt <eric@anholt.net> | 2014-01-18 10:57:29 -0800 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2014-02-07 12:46:48 -0800 |
| commit | d72956790fed5f62b8eea5938ed432544530f7bd (patch) | |
| tree | ade1672aac4cd8b278c7f88b91df6923bf8b2f01 /src/glsl/opt_algebraic.cpp | |
| parent | 6d7c123d6ce46e71ef22e431b76e972b9be1a157 (diff) | |
| download | external_mesa3d-d72956790fed5f62b8eea5938ed432544530f7bd.zip external_mesa3d-d72956790fed5f62b8eea5938ed432544530f7bd.tar.gz external_mesa3d-d72956790fed5f62b8eea5938ed432544530f7bd.tar.bz2 | |
glsl: Optimize pow(x, 1) -> x.
total instructions in shared programs: 1627826 -> 1627754 (-0.00%)
instructions in affected programs: 6640 -> 6568 (-1.08%)
GAINED: 0
LOST: 0
(HoN and savage2)
Reviewed-by: Matt Turner <mattst88@gmail.com>
Diffstat (limited to 'src/glsl/opt_algebraic.cpp')
| -rw-r--r-- | src/glsl/opt_algebraic.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index 1e71581..953b03c 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -520,6 +520,10 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) if (is_vec_one(op_const[0])) return op_const[0]; + /* x^1 == x */ + if (is_vec_one(op_const[1])) + return ir->operands[0]; + /* pow(2,x) == exp2(x) */ if (is_vec_two(op_const[0])) return expr(ir_unop_exp2, ir->operands[1]); |