diff options
author | Matt Turner <[email protected]> | 2013-10-16 16:56:44 -0700 |
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committer | Matt Turner <[email protected]> | 2013-10-21 22:53:36 -0700 |
commit | 963df4d37da7a7a1ee02cf26e142386a62a611f8 (patch) | |
tree | b43242309a457cc8294579521741cc191e5a784b /src/glsl | |
parent | 5b3aec412e1bcbc19b492a2ddd0ce0322acea5f6 (diff) |
glsl: Optimize abs(-expr) and abs(abs(expr)) into abs(expr).
Reviewed-by: Paul Berry <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Diffstat (limited to 'src/glsl')
-rw-r--r-- | src/glsl/opt_algebraic.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index b915f3c429b..9b0596cd71a 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -210,6 +210,24 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) this->mem_ctx = ralloc_parent(ir); switch (ir->operation) { + case ir_unop_abs: + if (op_expr[0] == NULL) + break; + + switch (op_expr[0]->operation) { + case ir_unop_abs: + case ir_unop_neg: + this->progress = true; + temp = new(mem_ctx) ir_expression(ir_unop_abs, + ir->type, + op_expr[0]->operands[0], + NULL); + return swizzle_if_required(ir, temp); + default: + break; + } + break; + case ir_unop_logic_not: { enum ir_expression_operation new_op = ir_unop_logic_not; |