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| author | Revital Eres <eres@il.ibm.com> | 2004-10-18 05:31:28 +0000 |
|---|---|---|
| committer | Mostafa Hagog <hagog@gcc.gnu.org> | 2004-10-18 05:31:28 +0000 |
| commit | f37a4f143d14f12cc7bb9a76e10e7a119bc3d61f (patch) | |
| tree | 659451af0eb92e8412fce0e70aaf671611d128e4 /gcc/params.def | |
| parent | 535306d0decc4821b3c4b896d5e7b837428c5160 (diff) | |
| download | gcc-f37a4f143d14f12cc7bb9a76e10e7a119bc3d61f.tar.gz | |
Makefile.in (loop-unroll.o): Add VARRAY_H dependency.
2004-10-18 Revital Eres <eres@il.ibm.com>
* Makefile.in (loop-unroll.o): Add VARRAY_H dependency.
* loop-unroll.c: Include varray.h.
(struct var_to_expand, struct opt_info): Rename split_ivs_info to
opt_info and expand it to support variable expansion.
(analyze_insns_in_loop): Rename analyze_ivs_to_split and
expand it to support variable expansion.
(pt_info_start_duplication): Rename si_info_start_duplication.
(apply_opt_in_copies): Rename split_ivs_in_copies and add support
to the variable expansion optimization.
(free_opt_info): Rename free_si_info.
(analyze_insn_to_expand_var, referenced_in_one_insn_in_loop_p,
expand_var_during_unrolling, insert_var_expansion_initialization,
combine_var_copies_in_loop_exit, release_var_copies,
get_expansion): New functions.
(peel_loop_completely, unroll_loop_constant_iterations,
unroll_loop_runtime_iterations, peel_loop_simple,
unroll_loop_stupid): Change uses of struct si_info
to struct opt_info
and add uses of fvariable-expansion-in-unroller flag.
* params.def: Add parameter to restrict the number of expansions.
* params.h: (MAX_VARIABLE_EXPANSIONS): New define to restrict
the number of expansions.
* common.opt: (fvariable-expansion-in-unroller): New flag.
* doc/invoke.texi: (fvariable-expansion-in-unroller): Document.
From-SVN: r89197
Diffstat (limited to 'gcc/params.def')
| -rw-r--r-- | gcc/params.def | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/params.def b/gcc/params.def index 845b8d2c51b..79c55bcd2c1 100644 --- a/gcc/params.def +++ b/gcc/params.def @@ -95,6 +95,15 @@ DEFPARAM (PARAM_MAX_INLINE_INSNS_RTL, "The maximum number of instructions for the RTL inliner", 600) +/* Limit the number of expansions created by the variable expansion + optimization to avoid register pressure. */ +DEFPARAM (PARAM_MAX_VARIABLE_EXPANSIONS, + "max-variable-expansions-in-unroller", + "If -fvariable-expansion-in-unroller is used, the maximum number of \ + times that an individual variable will be expanded \ + during loop unrolling", + 1) + /* The maximum number of instructions to consider when looking for an instruction to fill a delay slot. If more than this arbitrary number of instructions is searched, the time savings from filling |