/* Callgraph handling code.
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/* Callgraph handling code.
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Copyright (C) 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
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Copyright (C) 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
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Contributed by Jan Hubicka
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Contributed by Jan Hubicka
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This file is part of GCC.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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Software Foundation; either version 3, or (at your option) any later
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version.
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_CGRAPH_H
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#ifndef GCC_CGRAPH_H
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#define GCC_CGRAPH_H
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#define GCC_CGRAPH_H
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#include "tree.h"
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#include "tree.h"
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#include "basic-block.h"
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#include "basic-block.h"
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enum availability
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enum availability
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{
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{
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/* Not yet set by cgraph_function_body_availability. */
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/* Not yet set by cgraph_function_body_availability. */
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AVAIL_UNSET,
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AVAIL_UNSET,
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/* Function body/variable initializer is unknown. */
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/* Function body/variable initializer is unknown. */
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AVAIL_NOT_AVAILABLE,
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AVAIL_NOT_AVAILABLE,
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/* Function body/variable initializer is known but might be replaced
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/* Function body/variable initializer is known but might be replaced
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by a different one from other compilation unit and thus needs to
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by a different one from other compilation unit and thus needs to
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be dealt with a care. Like AVAIL_NOT_AVAILABLE it can have
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be dealt with a care. Like AVAIL_NOT_AVAILABLE it can have
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arbitrary side effects on escaping variables and functions, while
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arbitrary side effects on escaping variables and functions, while
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like AVAILABLE it might access static variables. */
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like AVAILABLE it might access static variables. */
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AVAIL_OVERWRITABLE,
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AVAIL_OVERWRITABLE,
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/* Function body/variable initializer is known and will be used in final
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/* Function body/variable initializer is known and will be used in final
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program. */
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program. */
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AVAIL_AVAILABLE,
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AVAIL_AVAILABLE,
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/* Function body/variable initializer is known and all it's uses are explicitly
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/* Function body/variable initializer is known and all it's uses are explicitly
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visible within current unit (ie it's address is never taken and it is not
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visible within current unit (ie it's address is never taken and it is not
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exported to other units).
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exported to other units).
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Currently used only for functions. */
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Currently used only for functions. */
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AVAIL_LOCAL
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AVAIL_LOCAL
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};
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};
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/* Information about the function collected locally.
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/* Information about the function collected locally.
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Available after function is analyzed. */
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Available after function is analyzed. */
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struct cgraph_local_info GTY(())
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struct cgraph_local_info GTY(())
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{
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{
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/* Size of the function before inlining. */
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/* Size of the function before inlining. */
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int self_insns;
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int self_insns;
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/* Set when function function is visible in current compilation unit only
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/* Set when function function is visible in current compilation unit only
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and its address is never taken. */
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and its address is never taken. */
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unsigned local : 1;
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unsigned local : 1;
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/* Set when function is visible by other units. */
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/* Set when function is visible by other units. */
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unsigned externally_visible : 1;
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unsigned externally_visible : 1;
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/* Set once it has been finalized so we consider it to be output. */
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/* Set once it has been finalized so we consider it to be output. */
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unsigned finalized : 1;
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unsigned finalized : 1;
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/* False when there something makes inlining impossible (such as va_arg). */
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/* False when there something makes inlining impossible (such as va_arg). */
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unsigned inlinable : 1;
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unsigned inlinable : 1;
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/* True when function should be inlined independently on its size. */
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/* True when function should be inlined independently on its size. */
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unsigned disregard_inline_limits : 1;
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unsigned disregard_inline_limits : 1;
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/* True when the function has been originally extern inline, but it is
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/* True when the function has been originally extern inline, but it is
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redefined now. */
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redefined now. */
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unsigned redefined_extern_inline : 1;
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unsigned redefined_extern_inline : 1;
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/* True if statics_read_for_function and
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/* True if statics_read_for_function and
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statics_written_for_function contain valid data. */
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statics_written_for_function contain valid data. */
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unsigned for_functions_valid : 1;
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unsigned for_functions_valid : 1;
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/* True if the function is going to be emitted in some other translation
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/* True if the function is going to be emitted in some other translation
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unit, referenced from vtable. */
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unit, referenced from vtable. */
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unsigned vtable_method : 1;
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unsigned vtable_method : 1;
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};
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};
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/* Information about the function that needs to be computed globally
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/* Information about the function that needs to be computed globally
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once compilation is finished. Available only with -funit-at-time. */
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once compilation is finished. Available only with -funit-at-time. */
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struct cgraph_global_info GTY(())
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struct cgraph_global_info GTY(())
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{
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{
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/* For inline clones this points to the function they will be inlined into. */
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/* For inline clones this points to the function they will be inlined into. */
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struct cgraph_node *inlined_to;
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struct cgraph_node *inlined_to;
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/* Estimated size of the function after inlining. */
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/* Estimated size of the function after inlining. */
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int insns;
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int insns;
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/* Estimated growth after inlining. INT_MIN if not computed. */
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/* Estimated growth after inlining. INT_MIN if not computed. */
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int estimated_growth;
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int estimated_growth;
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/* Set iff the function has been inlined at least once. */
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/* Set iff the function has been inlined at least once. */
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bool inlined;
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bool inlined;
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};
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};
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/* Information about the function that is propagated by the RTL backend.
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/* Information about the function that is propagated by the RTL backend.
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Available only for functions that has been already assembled. */
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Available only for functions that has been already assembled. */
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struct cgraph_rtl_info GTY(())
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struct cgraph_rtl_info GTY(())
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{
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{
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int preferred_incoming_stack_boundary;
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int preferred_incoming_stack_boundary;
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};
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};
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/* The cgraph data structure.
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/* The cgraph data structure.
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Each function decl has assigned cgraph_node listing callees and callers. */
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Each function decl has assigned cgraph_node listing callees and callers. */
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struct cgraph_node GTY((chain_next ("%h.next"), chain_prev ("%h.previous")))
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struct cgraph_node GTY((chain_next ("%h.next"), chain_prev ("%h.previous")))
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{
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{
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tree decl;
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tree decl;
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struct cgraph_edge *callees;
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struct cgraph_edge *callees;
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struct cgraph_edge *callers;
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struct cgraph_edge *callers;
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struct cgraph_node *next;
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struct cgraph_node *next;
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struct cgraph_node *previous;
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struct cgraph_node *previous;
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/* For nested functions points to function the node is nested in. */
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/* For nested functions points to function the node is nested in. */
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struct cgraph_node *origin;
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struct cgraph_node *origin;
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/* Points to first nested function, if any. */
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/* Points to first nested function, if any. */
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struct cgraph_node *nested;
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struct cgraph_node *nested;
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/* Pointer to the next function with same origin, if any. */
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/* Pointer to the next function with same origin, if any. */
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struct cgraph_node *next_nested;
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struct cgraph_node *next_nested;
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/* Pointer to the next function in cgraph_nodes_queue. */
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/* Pointer to the next function in cgraph_nodes_queue. */
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struct cgraph_node *next_needed;
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struct cgraph_node *next_needed;
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/* Pointer to the next clone. */
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/* Pointer to the next clone. */
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struct cgraph_node *next_clone;
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struct cgraph_node *next_clone;
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struct cgraph_node *prev_clone;
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struct cgraph_node *prev_clone;
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/* Pointer to a single unique cgraph node for this function. If the
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/* Pointer to a single unique cgraph node for this function. If the
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function is to be output, this is the copy that will survive. */
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function is to be output, this is the copy that will survive. */
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struct cgraph_node *master_clone;
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struct cgraph_node *master_clone;
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/* For functions with many calls sites it holds map from call expression
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/* For functions with many calls sites it holds map from call expression
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to the edge to speed up cgraph_edge function. */
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to the edge to speed up cgraph_edge function. */
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htab_t GTY((param_is (struct cgraph_edge))) call_site_hash;
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htab_t GTY((param_is (struct cgraph_edge))) call_site_hash;
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PTR GTY ((skip)) aux;
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PTR GTY ((skip)) aux;
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struct cgraph_local_info local;
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struct cgraph_local_info local;
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struct cgraph_global_info global;
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struct cgraph_global_info global;
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struct cgraph_rtl_info rtl;
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struct cgraph_rtl_info rtl;
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/* Expected number of executions: calculated in profile.c. */
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/* Expected number of executions: calculated in profile.c. */
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gcov_type count;
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gcov_type count;
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/* Unique id of the node. */
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/* Unique id of the node. */
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int uid;
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int uid;
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/* Ordering of all cgraph nodes. */
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/* Ordering of all cgraph nodes. */
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int order;
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int order;
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/* Set when function must be output - it is externally visible
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/* Set when function must be output - it is externally visible
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or its address is taken. */
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or its address is taken. */
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unsigned needed : 1;
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unsigned needed : 1;
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/* Set when function is reachable by call from other function
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/* Set when function is reachable by call from other function
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that is either reachable or needed. */
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that is either reachable or needed. */
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unsigned reachable : 1;
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unsigned reachable : 1;
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/* Set once the function is lowered (i.e. its CFG is built). */
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/* Set once the function is lowered (i.e. its CFG is built). */
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unsigned lowered : 1;
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unsigned lowered : 1;
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/* Set once the function has been instantiated and its callee
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/* Set once the function has been instantiated and its callee
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lists created. */
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lists created. */
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unsigned analyzed : 1;
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unsigned analyzed : 1;
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/* Set when function is scheduled to be assembled. */
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/* Set when function is scheduled to be assembled. */
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unsigned output : 1;
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unsigned output : 1;
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/* Set for aliases once they got through assemble_alias. */
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/* Set for aliases once they got through assemble_alias. */
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unsigned alias : 1;
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unsigned alias : 1;
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/* In non-unit-at-a-time mode the function body of inline candidates is saved
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/* In non-unit-at-a-time mode the function body of inline candidates is saved
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into clone before compiling so the function in original form can be
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into clone before compiling so the function in original form can be
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inlined later. This pointer points to the clone. */
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inlined later. This pointer points to the clone. */
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tree inline_decl;
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tree inline_decl;
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};
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};
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struct cgraph_edge GTY((chain_next ("%h.next_caller"), chain_prev ("%h.prev_caller")))
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struct cgraph_edge GTY((chain_next ("%h.next_caller"), chain_prev ("%h.prev_caller")))
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{
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{
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struct cgraph_node *caller;
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struct cgraph_node *caller;
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struct cgraph_node *callee;
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struct cgraph_node *callee;
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struct cgraph_edge *prev_caller;
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struct cgraph_edge *prev_caller;
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struct cgraph_edge *next_caller;
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struct cgraph_edge *next_caller;
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struct cgraph_edge *prev_callee;
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struct cgraph_edge *prev_callee;
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struct cgraph_edge *next_callee;
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struct cgraph_edge *next_callee;
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tree call_stmt;
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tree call_stmt;
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PTR GTY ((skip (""))) aux;
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PTR GTY ((skip (""))) aux;
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/* When NULL, inline this call. When non-NULL, points to the explanation
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/* When NULL, inline this call. When non-NULL, points to the explanation
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why function was not inlined. */
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why function was not inlined. */
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const char *inline_failed;
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const char *inline_failed;
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/* Expected number of executions: calculated in profile.c. */
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/* Expected number of executions: calculated in profile.c. */
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gcov_type count;
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gcov_type count;
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/* Depth of loop nest, 1 means no loop nest. */
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/* Depth of loop nest, 1 means no loop nest. */
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int loop_nest;
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int loop_nest;
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};
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};
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typedef struct cgraph_edge *cgraph_edge_p;
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typedef struct cgraph_edge *cgraph_edge_p;
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DEF_VEC_P(cgraph_edge_p);
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DEF_VEC_P(cgraph_edge_p);
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DEF_VEC_ALLOC_P(cgraph_edge_p,heap);
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DEF_VEC_ALLOC_P(cgraph_edge_p,heap);
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/* The cgraph_varpool data structure.
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/* The cgraph_varpool data structure.
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Each static variable decl has assigned cgraph_varpool_node. */
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Each static variable decl has assigned cgraph_varpool_node. */
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struct cgraph_varpool_node GTY(())
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struct cgraph_varpool_node GTY(())
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{
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{
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tree decl;
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tree decl;
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/* Pointer to the next function in cgraph_varpool_nodes. */
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/* Pointer to the next function in cgraph_varpool_nodes. */
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struct cgraph_varpool_node *next;
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struct cgraph_varpool_node *next;
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/* Pointer to the next function in cgraph_varpool_nodes_queue. */
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/* Pointer to the next function in cgraph_varpool_nodes_queue. */
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struct cgraph_varpool_node *next_needed;
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struct cgraph_varpool_node *next_needed;
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/* Ordering of all cgraph nodes. */
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/* Ordering of all cgraph nodes. */
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int order;
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int order;
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/* Set when function must be output - it is externally visible
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/* Set when function must be output - it is externally visible
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or its address is taken. */
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or its address is taken. */
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unsigned needed : 1;
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unsigned needed : 1;
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/* Needed variables might become dead by optimization. This flag
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/* Needed variables might become dead by optimization. This flag
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forces the variable to be output even if it appears dead otherwise. */
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forces the variable to be output even if it appears dead otherwise. */
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unsigned force_output : 1;
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unsigned force_output : 1;
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/* Set once the variable has been instantiated and its callee
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/* Set once the variable has been instantiated and its callee
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lists created. */
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lists created. */
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unsigned analyzed : 1;
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unsigned analyzed : 1;
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/* Set once it has been finalized so we consider it to be output. */
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/* Set once it has been finalized so we consider it to be output. */
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unsigned finalized : 1;
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unsigned finalized : 1;
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/* Set when variable is scheduled to be assembled. */
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/* Set when variable is scheduled to be assembled. */
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unsigned output : 1;
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unsigned output : 1;
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/* Set when function is visible by other units. */
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/* Set when function is visible by other units. */
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unsigned externally_visible : 1;
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unsigned externally_visible : 1;
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/* Set for aliases once they got through assemble_alias. */
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/* Set for aliases once they got through assemble_alias. */
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unsigned alias : 1;
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unsigned alias : 1;
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};
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};
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/* Every top level asm statement is put into a cgraph_asm_node. */
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/* Every top level asm statement is put into a cgraph_asm_node. */
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struct cgraph_asm_node GTY(())
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struct cgraph_asm_node GTY(())
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{
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{
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/* Next asm node. */
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/* Next asm node. */
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struct cgraph_asm_node *next;
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struct cgraph_asm_node *next;
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/* String for this asm node. */
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/* String for this asm node. */
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tree asm_str;
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tree asm_str;
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/* Ordering of all cgraph nodes. */
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/* Ordering of all cgraph nodes. */
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int order;
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int order;
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};
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};
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extern GTY(()) struct cgraph_node *cgraph_nodes;
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extern GTY(()) struct cgraph_node *cgraph_nodes;
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extern GTY(()) int cgraph_n_nodes;
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extern GTY(()) int cgraph_n_nodes;
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extern GTY(()) int cgraph_max_uid;
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extern GTY(()) int cgraph_max_uid;
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extern bool cgraph_global_info_ready;
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extern bool cgraph_global_info_ready;
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extern bool cgraph_function_flags_ready;
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extern bool cgraph_function_flags_ready;
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extern GTY(()) struct cgraph_node *cgraph_nodes_queue;
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extern GTY(()) struct cgraph_node *cgraph_nodes_queue;
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extern GTY(()) struct cgraph_node *cgraph_expand_queue;
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extern GTY(()) struct cgraph_node *cgraph_expand_queue;
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extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_first_unanalyzed_node;
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extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_first_unanalyzed_node;
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extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_last_needed_node;
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extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_last_needed_node;
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extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_nodes_queue;
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extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_nodes_queue;
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extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_nodes;
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extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_nodes;
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extern GTY(()) struct cgraph_asm_node *cgraph_asm_nodes;
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extern GTY(()) struct cgraph_asm_node *cgraph_asm_nodes;
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extern GTY(()) int cgraph_order;
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extern GTY(()) int cgraph_order;
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|
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/* In cgraph.c */
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/* In cgraph.c */
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void dump_cgraph (FILE *);
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void dump_cgraph (FILE *);
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void dump_cgraph_node (FILE *, struct cgraph_node *);
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void dump_cgraph_node (FILE *, struct cgraph_node *);
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void cgraph_insert_node_to_hashtable (struct cgraph_node *node);
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void cgraph_insert_node_to_hashtable (struct cgraph_node *node);
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void dump_varpool (FILE *);
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void dump_varpool (FILE *);
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void dump_cgraph_varpool_node (FILE *, struct cgraph_varpool_node *);
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void dump_cgraph_varpool_node (FILE *, struct cgraph_varpool_node *);
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void cgraph_remove_edge (struct cgraph_edge *);
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void cgraph_remove_edge (struct cgraph_edge *);
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void cgraph_remove_node (struct cgraph_node *);
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void cgraph_remove_node (struct cgraph_node *);
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void cgraph_node_remove_callees (struct cgraph_node *node);
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void cgraph_node_remove_callees (struct cgraph_node *node);
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struct cgraph_edge *cgraph_create_edge (struct cgraph_node *,
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struct cgraph_edge *cgraph_create_edge (struct cgraph_node *,
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struct cgraph_node *,
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struct cgraph_node *,
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tree, gcov_type, int);
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tree, gcov_type, int);
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struct cgraph_node *cgraph_node (tree);
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struct cgraph_node *cgraph_node (tree);
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struct cgraph_node *cgraph_node_for_asm (tree asmname);
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struct cgraph_node *cgraph_node_for_asm (tree asmname);
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struct cgraph_edge *cgraph_edge (struct cgraph_node *, tree);
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struct cgraph_edge *cgraph_edge (struct cgraph_node *, tree);
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void cgraph_set_call_stmt (struct cgraph_edge *, tree);
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void cgraph_set_call_stmt (struct cgraph_edge *, tree);
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struct cgraph_local_info *cgraph_local_info (tree);
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struct cgraph_local_info *cgraph_local_info (tree);
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struct cgraph_global_info *cgraph_global_info (tree);
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struct cgraph_global_info *cgraph_global_info (tree);
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struct cgraph_rtl_info *cgraph_rtl_info (tree);
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struct cgraph_rtl_info *cgraph_rtl_info (tree);
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const char * cgraph_node_name (struct cgraph_node *);
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const char * cgraph_node_name (struct cgraph_node *);
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struct cgraph_edge * cgraph_clone_edge (struct cgraph_edge *,
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struct cgraph_edge * cgraph_clone_edge (struct cgraph_edge *,
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struct cgraph_node *,
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struct cgraph_node *,
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tree, gcov_type, int, bool);
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tree, gcov_type, int, bool);
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struct cgraph_node * cgraph_clone_node (struct cgraph_node *, gcov_type,
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struct cgraph_node * cgraph_clone_node (struct cgraph_node *, gcov_type,
|
int, bool);
|
int, bool);
|
|
|
struct cgraph_varpool_node *cgraph_varpool_node (tree);
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struct cgraph_varpool_node *cgraph_varpool_node (tree);
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struct cgraph_varpool_node *cgraph_varpool_node_for_asm (tree asmname);
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struct cgraph_varpool_node *cgraph_varpool_node_for_asm (tree asmname);
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void cgraph_varpool_mark_needed_node (struct cgraph_varpool_node *);
|
void cgraph_varpool_mark_needed_node (struct cgraph_varpool_node *);
|
void cgraph_varpool_finalize_decl (tree);
|
void cgraph_varpool_finalize_decl (tree);
|
void cgraph_redirect_edge_callee (struct cgraph_edge *, struct cgraph_node *);
|
void cgraph_redirect_edge_callee (struct cgraph_edge *, struct cgraph_node *);
|
|
|
struct cgraph_asm_node *cgraph_add_asm_node (tree);
|
struct cgraph_asm_node *cgraph_add_asm_node (tree);
|
|
|
bool cgraph_function_possibly_inlined_p (tree);
|
bool cgraph_function_possibly_inlined_p (tree);
|
void cgraph_unnest_node (struct cgraph_node *);
|
void cgraph_unnest_node (struct cgraph_node *);
|
void cgraph_varpool_enqueue_needed_node (struct cgraph_varpool_node *);
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void cgraph_varpool_enqueue_needed_node (struct cgraph_varpool_node *);
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void cgraph_varpool_reset_queue (void);
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void cgraph_varpool_reset_queue (void);
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bool decide_is_variable_needed (struct cgraph_varpool_node *, tree);
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bool decide_is_variable_needed (struct cgraph_varpool_node *, tree);
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enum availability cgraph_function_body_availability (struct cgraph_node *);
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enum availability cgraph_function_body_availability (struct cgraph_node *);
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enum availability cgraph_variable_initializer_availability (struct cgraph_varpool_node *);
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enum availability cgraph_variable_initializer_availability (struct cgraph_varpool_node *);
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bool cgraph_is_master_clone (struct cgraph_node *);
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bool cgraph_is_master_clone (struct cgraph_node *);
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struct cgraph_node *cgraph_master_clone (struct cgraph_node *);
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struct cgraph_node *cgraph_master_clone (struct cgraph_node *);
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void cgraph_add_new_function (tree);
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void cgraph_add_new_function (tree);
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/* In cgraphunit.c */
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/* In cgraphunit.c */
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bool cgraph_assemble_pending_functions (void);
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bool cgraph_assemble_pending_functions (void);
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bool cgraph_varpool_assemble_pending_decls (void);
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bool cgraph_varpool_assemble_pending_decls (void);
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void cgraph_finalize_function (tree, bool);
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void cgraph_finalize_function (tree, bool);
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void cgraph_finalize_compilation_unit (void);
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void cgraph_finalize_compilation_unit (void);
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void cgraph_optimize (void);
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void cgraph_optimize (void);
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void cgraph_mark_needed_node (struct cgraph_node *);
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void cgraph_mark_needed_node (struct cgraph_node *);
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void cgraph_mark_reachable_node (struct cgraph_node *);
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void cgraph_mark_reachable_node (struct cgraph_node *);
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bool cgraph_inline_p (struct cgraph_edge *, const char **reason);
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bool cgraph_inline_p (struct cgraph_edge *, const char **reason);
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bool cgraph_preserve_function_body_p (tree);
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bool cgraph_preserve_function_body_p (tree);
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void verify_cgraph (void);
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void verify_cgraph (void);
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void verify_cgraph_node (struct cgraph_node *);
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void verify_cgraph_node (struct cgraph_node *);
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void cgraph_build_static_cdtor (char which, tree body, int priority);
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void cgraph_build_static_cdtor (char which, tree body, int priority);
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void cgraph_reset_static_var_maps (void);
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void cgraph_reset_static_var_maps (void);
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void init_cgraph (void);
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void init_cgraph (void);
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struct cgraph_node *cgraph_function_versioning (struct cgraph_node *,
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struct cgraph_node *cgraph_function_versioning (struct cgraph_node *,
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VEC(cgraph_edge_p,heap)*,
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VEC(cgraph_edge_p,heap)*,
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varray_type);
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varray_type);
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void cgraph_analyze_function (struct cgraph_node *);
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void cgraph_analyze_function (struct cgraph_node *);
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struct cgraph_node *save_inline_function_body (struct cgraph_node *);
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struct cgraph_node *save_inline_function_body (struct cgraph_node *);
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/* In ipa.c */
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/* In ipa.c */
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bool cgraph_remove_unreachable_nodes (bool, FILE *);
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bool cgraph_remove_unreachable_nodes (bool, FILE *);
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int cgraph_postorder (struct cgraph_node **);
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int cgraph_postorder (struct cgraph_node **);
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/* In ipa-inline.c */
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/* In ipa-inline.c */
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bool cgraph_decide_inlining_incrementally (struct cgraph_node *, bool);
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bool cgraph_decide_inlining_incrementally (struct cgraph_node *, bool);
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void cgraph_clone_inlined_nodes (struct cgraph_edge *, bool, bool);
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void cgraph_clone_inlined_nodes (struct cgraph_edge *, bool, bool);
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void cgraph_mark_inline_edge (struct cgraph_edge *, bool);
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void cgraph_mark_inline_edge (struct cgraph_edge *, bool);
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bool cgraph_default_inline_p (struct cgraph_node *, const char **);
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bool cgraph_default_inline_p (struct cgraph_node *, const char **);
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#endif /* GCC_CGRAPH_H */
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#endif /* GCC_CGRAPH_H */
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