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| author | Thomas Koenig <tkoenig@gcc.gnu.org> | 2017-11-05 17:24:37 +0000 |
|---|---|---|
| committer | Thomas Koenig <tkoenig@gcc.gnu.org> | 2017-11-05 17:24:37 +0000 |
| commit | d88412fc5139a0dbecbc8e61a817a088037501f6 (patch) | |
| tree | a619106d5d0f15135e88affa6a1b775ec677d5c2 /gcc/fortran/invoke.texi | |
| parent | 5233d45559d5869fe7dc9705d6c79e6538d8a2ab (diff) | |
| download | gcc-d88412fc5139a0dbecbc8e61a817a088037501f6.tar.gz | |
re PR fortran/82471 (Reorder loop for unfavorable index ordering in DO CONCURRENT and FORALL)
2017-11-05 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/82471
* lang.opt (ffrontend-loop-interchange): New option.
(Wfrontend-loop-interchange): New option.
* options.c (gfc_post_options): Handle ffrontend-loop-interchange.
* frontend-passes.c (gfc_run_passes): Run
optimize_namespace if flag_frontend_optimize or
flag_frontend_loop_interchange are set.
(optimize_namespace): Run functions according to flags set;
also call index_interchange.
(ind_type): New function.
(has_var): New function.
(index_cost): New function.
(loop_comp): New function.
2017-11-05 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/82471
* gfortran.dg/loop_interchange_1.f90: New test.
From-SVN: r254430
Diffstat (limited to 'gcc/fortran/invoke.texi')
| -rw-r--r-- | gcc/fortran/invoke.texi | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi index 261f2535bb5..bcb62434931 100644 --- a/gcc/fortran/invoke.texi +++ b/gcc/fortran/invoke.texi @@ -149,8 +149,9 @@ and warnings}. -Wdo-subscript -Wfunction-elimination -Wimplicit-interface @gol -Wimplicit-procedure -Wintrinsic-shadow -Wuse-without-only -Wintrinsics-std @gol -Wline-truncation -Wno-align-commons -Wno-tabs -Wreal-q-constant @gol --Wsurprising -Wunderflow -Wunused-parameter -Wrealloc-lhs -Wrealloc-lhs-all @gol --Wtarget-lifetime -fmax-errors=@var{n} -fsyntax-only -pedantic -pedantic-errors +-Wsurprising -Wunderflow -Wunused-parameter -Wrealloc-lhs @gol +-Wrealloc-lhs-all -Wfrontend-loop-interchange -Wtarget-lifetime @gol +-fmax-errors=@var{n} -fsyntax-only -pedantic -pedantic-errors @gol } @item Debugging Options @@ -183,6 +184,7 @@ and warnings}. -fbounds-check -fcheck-array-temporaries @gol -fcheck=@var{<all|array-temps|bounds|do|mem|pointer|recursion>} @gol -fcoarray=@var{<none|single|lib>} -fexternal-blas -ff2c +-ffrontend-loop-interchange @gol -ffrontend-optimize @gol -finit-character=@var{n} -finit-integer=@var{n} -finit-local-zero @gol -finit-derived @gol @@ -910,6 +912,13 @@ Enables some warning options for usages of language features which may be problematic. This currently includes @option{-Wcompare-reals}, @option{-Wunused-parameter} and @option{-Wdo-subscript}. +@item -Wfrontend-loop-interchange +@opindex @code{Wfrontend-loop-interchange} +@cindex warnings, loop interchange +@cindex loop interchange, warning +Enable warning for loop interchanges performed by the +@option{-ffrontend-loop-interchange} option. + @item -Wimplicit-interface @opindex @code{Wimplicit-interface} @cindex warnings, implicit interface @@ -1782,6 +1791,14 @@ expressions, removing unnecessary calls to @code{TRIM} in comparisons and assignments and replacing @code{TRIM(a)} with @code{a(1:LEN_TRIM(a))}. It can be deselected by specifying @option{-fno-frontend-optimize}. + +@item -ffrontend-loop-interchange +@opindex @code{frontend-loop-interchange} +@cindex loop interchange, Fortran +Attempt to interchange loops in the Fortran front end where +profitable. Enabled by default by any @option{-O} option. +At the moment, this option only affects @code{FORALL} and +@code{DO CONCURRENT} statements with several forall triplets. @end table @xref{Code Gen Options,,Options for Code Generation Conventions, |