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Makefile.in (gcse.o): Depend on params.h.

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* Makefile.in (gcse.o): Depend on params.h.
	* gcse.c: Include params.h.
	(gcse_main): Don't do GCSE if doing so will take inordinate
	amounts of memory.
	* params.def (PARAM_MAX_GCSE_MEMORY): New  parameter.
	* params.h (MAX_GCSE_MEMORY): New macro.

From-SVN: r41260
This commit is contained in:
Mark Mitchell 2001-04-11 18:22:46 +00:00 committed by Mark Mitchell
parent f3a8030a5b
commit f1fa37ff6b
5 changed files with 33 additions and 1 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2001-04-11 Mark Mitchell <mark@codesourcery.com>
* Makefile.in (gcse.o): Depend on params.h.
* gcse.c: Include params.h.
(gcse_main): Don't do GCSE if doing so will take inordinate
amounts of memory.
* params.def (PARAM_MAX_GCSE_MEMORY): New parameter.
* params.h (MAX_GCSE_MEMORY): New macro.
2001-04-11 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* Makefile.in (insn-output.o): Depend on $(EXPR_H).

2
gcc/Makefile.in
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@ -1465,7 +1465,7 @@ cse.o : cse.c $(CONFIG_H) $(SYSTEM_H) $(RTL_H) $(REGS_H) hard-reg-set.h flags.h
$(BASIC_BLOCK_H) $(GGC_H) $(TM_P_H)
gcse.o : gcse.c $(CONFIG_H) $(SYSTEM_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)
function.h output.h toplev.h $(TM_P_H) params.h
sibcall.o : sibcall.c $(CONFIG_H) $(SYSTEM_H) $(RTL_H) $(REGS_H) function.h \
hard-reg-set.h flags.h insn-config.h $(RECOG_H) $(BASIC_BLOCK_H)
resource.o : resource.c $(CONFIG_H) $(RTL_H) hard-reg-set.h $(SYSTEM_H) \

14
gcc/gcse.c
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@ -160,6 +160,7 @@ Boston, MA 02111-1307, USA. */
#include "function.h"
#include "expr.h"
#include "ggc.h"
#include "params.h"
#include "obstack.h"
#define obstack_chunk_alloc gmalloc
@ -767,6 +768,19 @@ gcse_main (f, file)
return 0;
}
/* If allocating memory for the cprop bitmap would take up too much
storage it's better just to disable the optimization. */
if ((n_basic_blocks
* SBITMAP_SET_SIZE (max_gcse_regno)
* sizeof (SBITMAP_ELT_TYPE)) > MAX_GCSE_MEMORY)
{
if (warn_disabled_optimization)
warning ("GCSE disabled: %d basic blocks and %d registers",
n_basic_blocks, max_gcse_regno);
return 0;
}
/* See what modes support reg/reg copy operations. */
if (! can_copy_init_p)
{

7
gcc/params.def
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@ -66,6 +66,13 @@ DEFPARAM(PARAM_MAX_DELAY_SLOT_LIVE_SEARCH,
"The maximum number of instructions to consider to find accurate live register information",
333)
/* The GCSE optimization will be disabled if it would require
significantly more memory than this value. */
DEFPARAM(PARAM_MAX_GCSE_MEMORY,
"max-gcse-memory",
"The maximum amount of memory to be allocated by GCSE",
50 * 1024 * 1024)
/*
Local variables:
mode:c

2
gcc/params.h
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@ -88,5 +88,7 @@ typedef enum compiler_param
PARAM_VALUE (PARAM_MAX_DELAY_SLOT_INSN_SEARCH)
#define MAX_DELAY_SLOT_LIVE_SEARCH \
PARAM_VALUE (PARAM_MAX_DELAY_SLOT_LIVE_SEARCH)
#define MAX_GCSE_MEMORY \
((size_t) PARAM_VALUE (PARAM_MAX_GCSE_MEMORY))
#endif /* PARAMS_H */