+2003-06-04 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz>
+
+ * 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.
+
Wed Jun 4 09:49:21 CEST 2003 Jan Hubicka <jh@suse.cz>
* i386.c (ix86_reorg): Replace the jump instead of adding nop.
cse.o : cse.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) $(REGS_H) \
hard-reg-set.h flags.h real.h insn-config.h $(RECOG_H) $(EXPR_H) toplev.h \
output.h function.h $(BASIC_BLOCK_H) $(GGC_H) $(TM_P_H) $(TIMEVAR_H) \
- except.h $(TARGET_H)
+ except.h $(TARGET_H) $(PARAMS_H)
gcse.o : gcse.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) $(REGS_H) \
hard-reg-set.h flags.h real.h insn-config.h ggc.h $(RECOG_H) $(EXPR_H) \
$(BASIC_BLOCK_H) function.h output.h toplev.h $(TM_P_H) $(PARAMS_H) except.h gt-gcse.h
#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
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
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));
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
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;
end_alias_analysis ();
free (uid_cuid);
free (reg_eqv_table);
+ free (val.path);
return cse_jumps_altered || recorded_label_ref;
}
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,
"The maximum number of incoming edges to consider for crossjumping",
100)
+/* The maximum length of path considered in cse. */
+DEFPARAM(PARAM_MAX_CSE_PATH_LENGTH,
+ "max-cse-path-length",
+ "The maximum length of path considered in cse.",
+ 10)
+
#ifdef ENABLE_GC_ALWAYS_COLLECT
# define GGC_MIN_EXPAND_DEFAULT 0
# define GGC_MIN_HEAPSIZE_DEFAULT 0