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| author | Eric Anholt <eric@anholt.net> | 2013-10-31 09:32:42 -0700 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2013-11-15 11:33:07 -0800 |
| commit | 58a98d32e451762934ca8c38135357f36e29654f (patch) | |
| tree | 9318b6555e30e2855ef806d03843fafd4c5836ee /src/glsl/opt_algebraic.cpp | |
| parent | ee2704826264eba22d095c3e1e03a8532b7bd1e6 (diff) | |
| download | external_mesa3d-58a98d32e451762934ca8c38135357f36e29654f.zip external_mesa3d-58a98d32e451762934ca8c38135357f36e29654f.tar.gz external_mesa3d-58a98d32e451762934ca8c38135357f36e29654f.tar.bz2 | |
glsl: Apply the transformation "(a && a) -> a" in opt_algebraic.
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Diffstat (limited to 'src/glsl/opt_algebraic.cpp')
| -rw-r--r-- | src/glsl/opt_algebraic.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index 3da27e5..ea3c386 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -357,7 +357,6 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) break; case ir_binop_logic_and: - /* FINISHME: Also simplify (a && a) to (a). */ if (is_vec_one(op_const[0])) { return ir->operands[1]; } else if (is_vec_one(op_const[1])) { @@ -371,6 +370,9 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) */ return logic_not(logic_or(op_expr[0]->operands[0], op_expr[1]->operands[0])); + } else if (ir->operands[0]->equals(ir->operands[1])) { + /* (a && a) == a */ + return ir->operands[0]; } break; |