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| author | Ben Elliston <bje@au.ibm.com> | 2004-10-27 21:02:16 +0000 |
|---|---|---|
| committer | Ben Elliston <bje@gcc.gnu.org> | 2004-10-28 07:02:16 +1000 |
| commit | 61b5800161f855eb1028cd76ad200bd0d63b2b77 (patch) | |
| tree | 13fd3cfcb73f6650e4dab5d9115c569183d1183a /gcc/tree-sra.c | |
| parent | 72111a1f4bb7d88865ee53bdc2fc26db58c534ca (diff) | |
| download | gcc-61b5800161f855eb1028cd76ad200bd0d63b2b77.zip gcc-61b5800161f855eb1028cd76ad200bd0d63b2b77.tar.gz gcc-61b5800161f855eb1028cd76ad200bd0d63b2b77.tar.bz2 | |
params.def (PARAM_SRA_MAX_STRUCTURE_SIZE): New.
* params.def (PARAM_SRA_MAX_STRUCTURE_SIZE): New.
(PARAM_SRA_FIELD_STRUCTURE_RATIO): Likewise.
* params.h (SRA_MAX_STRUCTURE_SIZE): New.
(SRA_FIELD_STRUCTURE_RATIO): Likewise.
* tree-sra.c: Include "params.h".
(decide_block_copy): Use new parameters.
* doc/invoke.texi (Optimize Options): Document new SRA pass
parameters sra-max-structure-size and sra-field-structure-ratio.
[testsuite]
* gcc.dg/tree-ssa/sra-1.c: Pass --param sra-max-structure-size.
From-SVN: r89711
Diffstat (limited to 'gcc/tree-sra.c')
| -rw-r--r-- | gcc/tree-sra.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/gcc/tree-sra.c b/gcc/tree-sra.c index 7519c3c..9fd40f9 100644 --- a/gcc/tree-sra.c +++ b/gcc/tree-sra.c @@ -48,6 +48,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "target.h" /* expr.h is needed for MOVE_RATIO. */ #include "expr.h" +#include "params.h" /* This object of this pass is to replace a non-addressable aggregate with a @@ -1292,6 +1293,14 @@ decide_block_copy (struct sra_elt *elt) { unsigned HOST_WIDE_INT full_size, inst_size = 0; unsigned int inst_count; + unsigned int max_size; + + /* If the sra-max-structure-size parameter is 0, then the + user has not overridden the parameter and we can choose a + sensible default. */ + max_size = SRA_MAX_STRUCTURE_SIZE + ? SRA_MAX_STRUCTURE_SIZE + : MOVE_RATIO * UNITS_PER_WORD; full_size = tree_low_cst (size_tree, 1); @@ -1302,14 +1311,14 @@ decide_block_copy (struct sra_elt *elt) /* If the structure is small, and we've made copies, go ahead and instantiate, hoping that the copies will go away. */ - if (full_size <= (unsigned) MOVE_RATIO * UNITS_PER_WORD + if (full_size <= max_size && elt->n_copies > elt->n_uses) use_block_copy = false; else { inst_count = sum_instantiated_sizes (elt, &inst_size); - if (inst_size * 4 >= full_size * 3) + if (inst_size * 100 >= full_size * SRA_FIELD_STRUCTURE_RATIO) use_block_copy = false; } |