diff options
author | Kenneth Graunke <[email protected]> | 2014-01-05 22:19:42 -0800 |
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committer | Kenneth Graunke <[email protected]> | 2014-01-07 12:54:57 -0800 |
commit | d6c1d66d3a74e25435b5ebcde208e8049b669120 (patch) | |
tree | 88007dfa70d208e86651000976387a5192510cac /src/glsl/opt_algebraic.cpp | |
parent | 05fbb021a6329add4b37c876c0621c1dcc3d4ef9 (diff) |
glsl: Optimize pow(1.0, X) --> 1.0.
Surprisingly, this helps one vertex shader in 3DMMES.
Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Diffstat (limited to 'src/glsl/opt_algebraic.cpp')
-rw-r--r-- | src/glsl/opt_algebraic.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index 05a58998985..5e885f78648 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -416,6 +416,12 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) } break; + case ir_binop_pow: + /* 1^x == 1 */ + if (is_vec_one(op_const[0])) + return op_const[0]; + break; + case ir_unop_rcp: if (op_expr[0] && op_expr[0]->operation == ir_unop_rcp) return op_expr[0]->operands[0]; |