Module: Mesa Branch: glsl2 Commit: 14f8e16132409f38656e4874aa53bc471977f9ad URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=14f8e16132409f38656e4874aa53bc471977f9ad
Author: Eric Anholt <[email protected]> Date: Tue Jul 20 11:43:28 2010 -0700 glsl2: Constant-fold assignment conditions. --- src/glsl/ir_constant_folding.cpp | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-) diff --git a/src/glsl/ir_constant_folding.cpp b/src/glsl/ir_constant_folding.cpp index 2daa6fd..66a92e9 100644 --- a/src/glsl/ir_constant_folding.cpp +++ b/src/glsl/ir_constant_folding.cpp @@ -167,6 +167,19 @@ ir_constant_folding_visitor::visit(ir_assignment *ir) ir->rhs = const_val; else ir->rhs->accept(this); + + if (ir->condition) { + /* If the condition is constant, either remove the condition or + * remove the never-executed assignment. + */ + const_val = ir->condition->constant_expression_value(); + if (const_val) { + if (const_val->value.b[0]) + ir->condition = NULL; + else + ir->remove(); + } + } } _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
