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author | Ian Romanick <ian.d.romanick@intel.com> | 2010-08-16 19:08:53 -0700 |
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committer | Ian Romanick <ian.d.romanick@intel.com> | 2010-08-16 19:08:53 -0700 |
commit | 6c03c576cc49bbb008de66d374f4302ff0fe0390 (patch) | |
tree | 7ddeb3ee88532d9aef8728b9aa256edf7c125247 /src/glsl/ir_function_can_inline.cpp | |
parent | 15a3b42e135a3a2cb463ec3cff80a55dd8528051 (diff) | |
parent | a433cd286c60eb9d4c2114f042709eda0f3de676 (diff) |
Merge branch 'glsl2'
Conflicts:
src/mesa/program/prog_optimize.c
Diffstat (limited to 'src/glsl/ir_function_can_inline.cpp')
-rw-r--r-- | src/glsl/ir_function_can_inline.cpp | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/glsl/ir_function_can_inline.cpp b/src/glsl/ir_function_can_inline.cpp new file mode 100644 index 0000000000..8bb8e0d9ed --- /dev/null +++ b/src/glsl/ir_function_can_inline.cpp @@ -0,0 +1,71 @@ +/* + * 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 ir_function_can_inline.cpp + * + * Determines if we can inline a function call using ir_function_inlining.cpp. + * + * The primary restriction is that we can't return from the function + * other than as the last instruction. We could potentially work + * around this for some constructs by flattening control flow and + * moving the return to the end, or by using breaks from a do {} while + * (0) loop surrounding the function body. + */ + +#include "ir.h" + +class ir_function_can_inline_visitor : public ir_hierarchical_visitor { +public: + ir_function_can_inline_visitor() + { + this->num_returns = 0; + } + + virtual ir_visitor_status visit_enter(ir_return *); + + int num_returns; +}; + +ir_visitor_status +ir_function_can_inline_visitor::visit_enter(ir_return *ir) +{ + (void) ir; + this->num_returns++; + return visit_continue; +} + +bool +can_inline(ir_call *call) +{ + ir_function_can_inline_visitor v; + const ir_function_signature *callee = call->get_callee(); + + v.run((exec_list *) &callee->body); + + ir_instruction *last = (ir_instruction *)callee->body.get_tail(); + if (last && !last->as_return()) + v.num_returns++; + + return v.num_returns == 1; +} |