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| author | Xinliang David Li <davidxl@google.com> | 2013-09-24 20:44:03 +0000 |
|---|---|---|
| committer | Xinliang David Li <davidxl@gcc.gnu.org> | 2013-09-24 20:44:03 +0000 |
| commit | 4f17aa0b9d1c065f9c1b2979e5782530cade3776 (patch) | |
| tree | ad589584e20951af8c0b712b9c985c104b7654e7 /gcc | |
| parent | 114f3eb91d259328f4e043c667656d4ec6bce31a (diff) | |
| download | gcc-4f17aa0b9d1c065f9c1b2979e5782530cade3776.zip gcc-4f17aa0b9d1c065f9c1b2979e5782530cade3776.tar.gz gcc-4f17aa0b9d1c065f9c1b2979e5782530cade3776.tar.bz2 | |
Implement --param=vect-max-peeling-for-alignment=..
From-SVN: r202875
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/doc/invoke.texi | 4 | ||||
| -rw-r--r-- | gcc/params.def | 5 | ||||
| -rw-r--r-- | gcc/tree-vect-data-refs.c | 24 |
4 files changed, 40 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 47c31a0..49e9262 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2013-09-24 Xinliang David Li <davidxl@google.com> + + * tree-vect-data-refs.c (vect_enhance_data_refs_alignment): + Check max peel iterations parameter. + * param.def: New parameter. + * doc/invoke.texi: Document New parameter. + 2013-09-24 Christophe Lyon <christophe.lyon@linaro.org> * gimple-pretty-print.c: Various whitespace tweaks. diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index aa0f4ed..508bbb4 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -9451,6 +9451,10 @@ The maximum number of run-time checks that can be performed when doing loop versioning for alias in the vectorizer. See option @option{-ftree-vect-loop-version} for more information. +@item vect-max-peeling-for-alignment +The maximum number of loop peels to enhance access alignment +for vectorizer. Value -1 means 'no limit'. + @item max-iterations-to-track The maximum number of iterations of a loop the brute-force algorithm for analysis of the number of iterations of the loop tries to evaluate. diff --git a/gcc/params.def b/gcc/params.def index 3c52651..2749137 100644 --- a/gcc/params.def +++ b/gcc/params.def @@ -544,6 +544,11 @@ DEFPARAM(PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS, "Bound on number of runtime checks inserted by the vectorizer's loop versioning for alias check", 10, 0, 0) +DEFPARAM(PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT, + "vect-max-peeling-for-alignment", + "Max number of loop peels to enhancement alignment of data references in a loop", + -1, -1, 64) + DEFPARAM(PARAM_MAX_CSELIB_MEMORY_LOCATIONS, "max-cselib-memory-locations", "The maximum memory locations recorded by cselib", diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c index 98055ae..c8cdcb8 100644 --- a/gcc/tree-vect-data-refs.c +++ b/gcc/tree-vect-data-refs.c @@ -1718,6 +1718,30 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo) if (do_peeling) { + unsigned max_allowed_peel + = PARAM_VALUE (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT); + if (max_allowed_peel != (unsigned)-1) + { + unsigned max_peel = npeel; + if (max_peel == 0) + { + gimple dr_stmt = DR_STMT (dr0); + stmt_vec_info vinfo = vinfo_for_stmt (dr_stmt); + tree vtype = STMT_VINFO_VECTYPE (vinfo); + max_peel = TYPE_VECTOR_SUBPARTS (vtype) - 1; + } + if (max_peel > max_allowed_peel) + { + do_peeling = false; + if (dump_enabled_p ()) + dump_printf_loc (MSG_NOTE, vect_location, + "Disable peeling, max peels reached: %d\n", max_peel); + } + } + } + + if (do_peeling) + { stmt_info_for_cost *si; void *data = LOOP_VINFO_TARGET_COST_DATA (loop_vinfo); |