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| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-01-19 09:31:16 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-01-19 09:31:16 +0000 |
| commit | 9c8b7028ac956395a283ec6366ac87e468891d79 (patch) | |
| tree | ef90a2aa86b89aceaa4c818ff027effc25d5f55e /gcc/params.def | |
| parent | 3a3c175c8c15053145c7607e069e607e3f319488 (diff) | |
| download | gcc-9c8b7028ac956395a283ec6366ac87e468891d79.tar.gz | |
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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@93892 138bc75d-0d04-0410-961f-82ee72b054a4
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 7ac263cdc24..3ef5893fd42 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. */ |