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author | Emil Velikov <emil.velikov@collabora.com> | 2016-01-18 12:16:48 +0200 |
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committer | Emil Velikov <emil.l.velikov@gmail.com> | 2016-01-26 16:08:33 +0000 |
commit | eb63640c1d38a200a7b1540405051d3ff79d0d8a (patch) | |
tree | da46321a41f309b1d02aeb14d5d5487791c45aeb /src/compiler/glsl/ir_function_can_inline.cpp | |
parent | a39a8fbbaa129f4e52f2a3ad2747182e9a74d910 (diff) | |
download | external_mesa3d-eb63640c1d38a200a7b1540405051d3ff79d0d8a.zip external_mesa3d-eb63640c1d38a200a7b1540405051d3ff79d0d8a.tar.gz external_mesa3d-eb63640c1d38a200a7b1540405051d3ff79d0d8a.tar.bz2 |
glsl: move to compiler/
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Matt Turner <mattst88@gmail.com>
Acked-by: Jose Fonseca <jfonseca@vmware.com>
Diffstat (limited to 'src/compiler/glsl/ir_function_can_inline.cpp')
-rw-r--r-- | src/compiler/glsl/ir_function_can_inline.cpp | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/compiler/glsl/ir_function_can_inline.cpp b/src/compiler/glsl/ir_function_can_inline.cpp new file mode 100644 index 0000000..3b1d15f --- /dev/null +++ b/src/compiler/glsl/ir_function_can_inline.cpp @@ -0,0 +1,75 @@ +/* + * 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. In lower_jumps.cpp, we can lower return + * statements not at the end of the function to other control flow in order to + * deal with this restriction. + */ + +#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->callee; + if (!callee->is_defined) + return false; + + v.run((exec_list *) &callee->body); + + /* If the function is empty (no last instruction) or does not end with a + * return statement, we need to count the implicit return. + */ + ir_instruction *last = (ir_instruction *)callee->body.get_tail(); + if (last == NULL || !last->as_return()) + v.num_returns++; + + return v.num_returns == 1; +} |