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| author | Mark Mitchell <mark@codesourcery.com> | 2001-04-11 18:22:46 +0000 |
|---|---|---|
| committer | Mark Mitchell <mmitchel@gcc.gnu.org> | 2001-04-11 18:22:46 +0000 |
| commit | f1fa37ff6bbd4f760f7df6e60dd44cf731d79f44 (patch) | |
| tree | 36d9539f4aea987e424c87b9c099ac485cbe15f3 /gcc/gcse.c | |
| parent | f3a8030a5bb6a347cdfd4c9fcedabb76bac54ea5 (diff) | |
| download | gcc-f1fa37ff6bbd4f760f7df6e60dd44cf731d79f44.zip gcc-f1fa37ff6bbd4f760f7df6e60dd44cf731d79f44.tar.gz gcc-f1fa37ff6bbd4f760f7df6e60dd44cf731d79f44.tar.bz2 | |
Makefile.in (gcse.o): Depend on params.h.
* 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
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 14 |
1 files changed, 14 insertions, 0 deletions
@@ -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) { |