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| author | mmitchel <mmitchel@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-04-11 18:22:46 +0000 |
|---|---|---|
| committer | mmitchel <mmitchel@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-04-11 18:22:46 +0000 |
| commit | 9159979b4644af28303f47166397aa5d3802b115 (patch) | |
| tree | 36d9539f4aea987e424c87b9c099ac485cbe15f3 /gcc/gcse.c | |
| parent | 9ff0b0fdc7e12b3beab1ab7cf9bfa3d2f05dc0c1 (diff) | |
| download | gcc-9159979b4644af28303f47166397aa5d3802b115.tar.gz | |
* 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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@41260 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/gcse.c b/gcc/gcse.c index 9121af7cb74..402e85e787e 100644 --- a/gcc/gcse.c +++ b/gcc/gcse.c @@ -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) { |