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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ssaexpand.h] - Rev 758
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/* Routines for expanding from SSA form to RTL. Copyright (C) 2009 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ #ifndef _SSAEXPAND_H #define _SSAEXPAND_H 1 #include "tree-ssa-live.h" /* This structure (of which only a singleton SA exists) is used to pass around information between the outof-SSA functions, cfgexpand and expand itself. */ struct ssaexpand { /* The computed partitions of SSA names are stored here. */ var_map map; /* For an SSA name version V bit V is set iff TER decided that its definition should be forwarded. */ bitmap values; /* For a partition number I partition_to_pseudo[I] contains the RTL expression of the allocated space of it (either a MEM or a pseudos REG). */ rtx *partition_to_pseudo; /* If partition I contains an SSA name that has a default def, bit I will be set in this bitmap. */ bitmap partition_has_default_def; }; /* This is the singleton described above. */ extern struct ssaexpand SA; /* Returns the RTX expression representing the storage of the outof-SSA partition that the SSA name EXP is a member of. */ static inline rtx get_rtx_for_ssa_name (tree exp) { int p = partition_find (SA.map->var_partition, SSA_NAME_VERSION (exp)); if (SA.map->partition_to_view) p = SA.map->partition_to_view[p]; gcc_assert (p != NO_PARTITION); return SA.partition_to_pseudo[p]; } /* If TER decided to forward the definition of SSA name EXP this function returns the defining statement, otherwise NULL. */ static inline gimple get_gimple_for_ssa_name (tree exp) { int v = SSA_NAME_VERSION (exp); if (SA.values && bitmap_bit_p (SA.values, v)) return SSA_NAME_DEF_STMT (exp); return NULL; } /* In tree-outof-ssa.c. */ void finish_out_of_ssa (struct ssaexpand *sa); unsigned int rewrite_out_of_ssa (struct ssaexpand *sa); void expand_phi_nodes (struct ssaexpand *sa); #endif
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