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author | Christoph Bumiller <e0425955@student.tuwien.ac.at> | 2010-12-19 21:46:33 +0100 |
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committer | Christoph Bumiller <e0425955@student.tuwien.ac.at> | 2010-12-19 21:46:33 +0100 |
commit | 0f68236a2487dbeb0396b996debcda595b0b54a1 (patch) | |
tree | 938ae3b779349b6dba6f5a891550604f9a9ca895 /src/glsl/opt_noop_swizzle.cpp | |
parent | d047168d81cfeb39a98f3ae16416872facc6237c (diff) | |
parent | 237880463d5168cad8df0bae6018b5fd76617777 (diff) |
Merge remote branch 'origin/master' into nvc0-new
Diffstat (limited to 'src/glsl/opt_noop_swizzle.cpp')
-rw-r--r-- | src/glsl/opt_noop_swizzle.cpp | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/glsl/opt_noop_swizzle.cpp b/src/glsl/opt_noop_swizzle.cpp new file mode 100644 index 0000000000..0a906aaf1d --- /dev/null +++ b/src/glsl/opt_noop_swizzle.cpp @@ -0,0 +1,80 @@ +/* + * Copyright © 2010 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +/** + * \file opt_noop_swizzle.cpp + * + * If a swizzle doesn't change the order or count of components, then + * remove the swizzle so that other optimization passes see the value + * behind it. + */ + +#include "ir.h" +#include "ir_visitor.h" +#include "ir_rvalue_visitor.h" +#include "ir_print_visitor.h" +#include "glsl_types.h" + +class ir_noop_swizzle_visitor : public ir_rvalue_visitor { +public: + ir_noop_swizzle_visitor() + { + this->progress = false; + } + + void handle_rvalue(ir_rvalue **rvalue); + bool progress; +}; + +void +ir_noop_swizzle_visitor::handle_rvalue(ir_rvalue **rvalue) +{ + if (!*rvalue) + return; + + ir_swizzle *swiz = (*rvalue)->as_swizzle(); + if (!swiz || swiz->type != swiz->val->type) + return; + + int elems = swiz->val->type->vector_elements; + if (swiz->mask.x != 0) + return; + if (elems >= 2 && swiz->mask.y != 1) + return; + if (elems >= 3 && swiz->mask.z != 2) + return; + if (elems >= 4 && swiz->mask.w != 3) + return; + + this->progress = true; + *rvalue = swiz->val; +} + +bool +do_noop_swizzle(exec_list *instructions) +{ + ir_noop_swizzle_visitor v; + visit_list_elements(&v, instructions); + + return v.progress; +} |