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opts.c (enable_fdo_optimizations): Enable version-loops-for-strides... 

* opts.c (enable_fdo_optimizations): Enable
	version-loops-for-strides, loop-interchange, unrol-and-jam
	and tree-loop-distribution.
	* invoke.texi: Document newly enabled options.

From-SVN: r267611
This commit is contained in:
Jan Hubicka 2019-01-06 17:44:51 +01:00 committed by Jan Hubicka
parent 13b1afe4de
commit a9a32e564d
3 changed files with 23 additions and 0 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2019-01-05 Jan Hubicka <hubicka@ucw.cz>
* opts.c (enable_fdo_optimizations): Enable
version-loops-for-strides, loop-interchange, unrol-and-jam
and tree-loop-distribution.
* invoke.texi: Document newly enabled options.
2019-01-05 Jan Hubicka <hubicka@ucw.cz>
* doc/invoke.texi (max-inline-insns-small): New parameters.

8
gcc/doc/invoke.texi
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@ -9499,6 +9499,8 @@ DO I = 1, N
D(I) = E(I) * F
ENDDO
@end smallexample
This flag is enabled by default at @option{-O3}.
It is also enabled by @option{-fprofile-use} and @option{-fauto-profile}.
@item -ftree-loop-distribute-patterns
@opindex ftree-loop-distribute-patterns
@ -9524,6 +9526,8 @@ DO I = 1, N
ENDDO
@end smallexample
and the initialization loop is transformed into a call to memset zero.
This flag is enabled by default at @option{-O3}.
It is also enabled by @option{-fprofile-use} and @option{-fauto-profile}.
@item -floop-interchange
@opindex floop-interchange
@ -9544,12 +9548,14 @@ for (int i = 0; i < N; i++)
c[i][j] = c[i][j] + a[i][k]*b[k][j];
@end smallexample
This flag is enabled by default at @option{-O3}.
It is also enabled by @option{-fprofile-use} and @option{-fauto-profile}.
@item -floop-unroll-and-jam
@opindex floop-unroll-and-jam
Apply unroll and jam transformations on feasible loops. In a loop
nest this unrolls the outer loop by some factor and fuses the resulting
multiple inner loops. This flag is enabled by default at @option{-O3}.
It is also enabled by @option{-fprofile-use} and @option{-fauto-profile}.
@item -ftree-loop-im
@opindex ftree-loop-im
@ -10804,6 +10810,8 @@ else
This is particularly useful for assumed-shape arrays in Fortran where
(for example) it allows better vectorization assuming contiguous accesses.
This flag is enabled by default at @option{-O3}.
It is also enabled by @option{-fprofile-use} and @option{-fauto-profile}.
@item -ffunction-sections
@itemx -fdata-sections

8
gcc/opts.c
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@ -1708,10 +1708,18 @@ enable_fdo_optimizations (struct gcc_options *opts,
opts->x_flag_tree_loop_vectorize = value;
if (!opts_set->x_flag_tree_slp_vectorize)
opts->x_flag_tree_slp_vectorize = value;
if (!opts_set->x_flag_version_loops_for_strides)
opts->x_flag_version_loops_for_strides = value;
if (!opts_set->x_flag_vect_cost_model)
opts->x_flag_vect_cost_model = VECT_COST_MODEL_DYNAMIC;
if (!opts_set->x_flag_tree_loop_distribute_patterns)
opts->x_flag_tree_loop_distribute_patterns = value;
if (!opts_set->x_flag_loop_interchange)
opts->x_flag_loop_interchange = value;
if (!opts_set->x_flag_unroll_jam)
opts->x_flag_unroll_jam = value;
if (!opts_set->x_flag_tree_loop_distribution)
opts->x_flag_tree_loop_distribution = value;
}
/* -f{,no-}sanitize{,-recover}= suboptions. */