From a9a32e564de826c3526f1a0626f8115588a5452b Mon Sep 17 00:00:00 2001 From: Jan Hubicka Date: Sun, 6 Jan 2019 17:44:51 +0100 Subject: [PATCH] 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 --- gcc/ChangeLog | 7 +++++++ gcc/doc/invoke.texi | 8 ++++++++ gcc/opts.c | 8 ++++++++ 3 files changed, 23 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a231aeea356..0ec2e3463ba 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2019-01-05 Jan Hubicka + + * 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 * doc/invoke.texi (max-inline-insns-small): New parameters. diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 0706db60e11..59a74afed83 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -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 diff --git a/gcc/opts.c b/gcc/opts.c index a4be6ae9c2a..79b7279c024 100644 --- a/gcc/opts.c +++ b/gcc/opts.c @@ -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. */ -- 2.30.2