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| author | Jakub Jelinek <jakub@redhat.com> | 2005-01-19 10:31:16 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2005-01-19 10:31:16 +0100 |
| commit | 49c3b9a84696a13e3ef71708ef80552606dd08c4 (patch) | |
| tree | ef90a2aa86b89aceaa4c818ff027effc25d5f55e /gcc/params.def | |
| parent | e89be13bdf98cff1cbbdd9490e4b4d5e20e68baf (diff) | |
| download | gcc-49c3b9a84696a13e3ef71708ef80552606dd08c4.zip gcc-49c3b9a84696a13e3ef71708ef80552606dd08c4.tar.gz gcc-49c3b9a84696a13e3ef71708ef80552606dd08c4.tar.bz2 | |
re PR rtl-optimization/15139 (cc1 uses excessive amounts of memory compiling small routine)
PR rtl-optimization/15139
* combine.c: Include params.h.
(count_rtxs): New function.
(record_value_for_reg): If replace_rtx would replace at least
2 occurrences of REG in VALUE and TEM is really large, replace REG with
(clobber (const_int 0)) instead of TEM.
* params.def (PARAM_MAX_LAST_VALUE_RTL): New.
* params.h (MAX_LAST_VALUE_RTL): New.
* Makefile.in (combine.o): Depend on $(PARAMS_H).
* doc/invoke.texi (--param max-last-value-rtl=N): Document.
* gcc.dg/20050111-2.c: New test.
From-SVN: r93892
Diffstat (limited to 'gcc/params.def')
| -rw-r--r-- | gcc/params.def | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/params.def b/gcc/params.def index 7ac263c..3ef5893 100644 --- a/gcc/params.def +++ b/gcc/params.def @@ -408,6 +408,11 @@ DEFPARAM(PARAM_MAX_SCHED_REGION_INSNS, "The maximum number of insns in a region to be considered for interblock scheduling", 100, 0, 0) +DEFPARAM(PARAM_MAX_LAST_VALUE_RTL, + "max-last-value-rtl", + "The maximum number of RTL nodes that can be recorded as combiner's last value", + 10000, 0, 0) + /* INTEGER_CST nodes are shared for values [{-1,0} .. N) for {signed,unsigned} integral types. This determines N. Experimentation shows 256 to be a good value. */ |