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| author | Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> | 2003-06-04 09:51:41 +0200 |
|---|---|---|
| committer | Zdenek Dvorak <rakdver@gcc.gnu.org> | 2003-06-04 07:51:41 +0000 |
| commit | 9bf8cfbfcd4c863cc05bc186e29aa07247276bb4 (patch) | |
| tree | 2d98fe2e63519131803e58e2cf702902ee9316d4 /gcc/cse.c | |
| parent | 253c7a0090928522c2bca312dc227ebf53b2dd99 (diff) | |
| download | gcc-9bf8cfbfcd4c863cc05bc186e29aa07247276bb4.zip gcc-9bf8cfbfcd4c863cc05bc186e29aa07247276bb4.tar.gz gcc-9bf8cfbfcd4c863cc05bc186e29aa07247276bb4.tar.bz2 | |
Makefile.in (cse.o): Add params.h dependency.
* Makefile.in (cse.o): Add params.h dependency.
* cse.c: Include params.h.
(PATHLENGTH): Removed.
(struct cse_basic_block_data): Make path array dynamic.
(cse_end_of_basic_block): Use PARAM_MAX_CSE_PATH_LENGTH instead of PATHLENGTH.
(cse_main, cse_basic_block): Allocate path array.
* params.def (PARAM_MAX_CSE_PATH_LENGTH): New.
From-SVN: r67433
Diffstat (limited to 'gcc/cse.c')
| -rw-r--r-- | gcc/cse.c | 16 |
1 files changed, 10 insertions, 6 deletions
@@ -42,6 +42,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "timevar.h" #include "except.h" #include "target.h" +#include "params.h" /* The basic idea of common subexpression elimination is to go through the code, keeping a record of expressions that would @@ -569,10 +570,6 @@ static struct table_elt *last_jump_equiv_class; static int constant_pool_entries_cost; -/* Define maximum length of a branch path. */ - -#define PATHLENGTH 10 - /* This data describes a block that will be processed by cse_basic_block. */ struct cse_basic_block_data @@ -596,7 +593,7 @@ struct cse_basic_block_data except that it is used when the destination label is not preceded by a BARRIER. */ enum taken {TAKEN, NOT_TAKEN, AROUND} status; - } path[PATHLENGTH]; + } *path; }; static bool fixed_base_plus_p PARAMS ((rtx x)); @@ -6947,7 +6944,7 @@ cse_end_of_basic_block (insn, data, follow_jumps, after_loop, skip_blocks) In this case invalidate_skipped_block will be called to invalidate any registers set in the block when following the jump. */ - else if ((follow_jumps || skip_blocks) && path_size < PATHLENGTH - 1 + else if ((follow_jumps || skip_blocks) && path_size < PARAM_VALUE (PARAM_MAX_CSE_PATH_LENGTH) - 1 && GET_CODE (p) == JUMP_INSN && GET_CODE (PATTERN (p)) == SET && GET_CODE (SET_SRC (PATTERN (p))) == IF_THEN_ELSE @@ -7077,6 +7074,9 @@ cse_main (f, nregs, after_loop, file) rtx insn = f; int i; + val.path = xmalloc (sizeof (struct branch_path) + * PARAM_VALUE (PARAM_MAX_CSE_PATH_LENGTH)); + cse_jumps_altered = 0; recorded_label_ref = 0; constant_pool_entries_cost = 0; @@ -7200,6 +7200,7 @@ cse_main (f, nregs, after_loop, file) end_alias_analysis (); free (uid_cuid); free (reg_eqv_table); + free (val.path); return cse_jumps_altered || recorded_label_ref; } @@ -7377,7 +7378,10 @@ cse_basic_block (from, to, next_branch, around_loop) following branches in this case. */ to_usage = 0; val.path_size = 0; + val.path = xmalloc (sizeof (struct branch_path) + * PARAM_VALUE (PARAM_MAX_CSE_PATH_LENGTH)); cse_end_of_basic_block (insn, &val, 0, 0, 0); + free (val.path); /* If the tables we allocated have enough space left to handle all the SETs in the next basic block, |