diff options
| author | Matt Turner <[email protected]> | 2014-02-28 13:33:19 -0800 |
|---|---|---|
| committer | Matt Turner <[email protected]> | 2014-03-18 23:20:29 -0700 |
| commit | 6cbc64c3cb416fadad6e80042e24cd1e1b682897 (patch) | |
| tree | 906bd4d7ca4ad006ec3a922fff169992b4176f10 | |
| parent | 9a9eaaa79a43e5fb249ff56a06c3f845e6a28a41 (diff) | |
glsl: Optimize pow(x, 2) into x * x.
Cuts two instructions out of SynMark's Gl32VSInstancing benchmark.
Reviewed-by: Eric Anholt <[email protected]>
| -rw-r--r-- | src/glsl/opt_algebraic.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index 5c49a785ccd..8494bd9ec53 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -528,6 +528,14 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) if (is_vec_two(op_const[0])) return expr(ir_unop_exp2, ir->operands[1]); + if (is_vec_two(op_const[1])) { + ir_variable *x = new(ir) ir_variable(ir->operands[1]->type, "x", + ir_var_temporary); + base_ir->insert_before(x); + base_ir->insert_before(assign(x, ir->operands[0])); + return mul(x, x); + } + break; case ir_unop_rcp: |