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| author | Janus Weil <janus@gcc.gnu.org> | 2018-08-10 16:08:53 +0200 |
|---|---|---|
| committer | Janus Weil <janus@gcc.gnu.org> | 2018-08-10 16:08:53 +0200 |
| commit | bf9197df810b0b0ac032c7e480d5a8b24c22f973 (patch) | |
| tree | 11d80fa0ccfd814b4d9c2e52533951c7081beb60 /gcc/fortran/invoke.texi | |
| parent | 8b9a5b5e0e1c69cd97f56c732cdb8a96c92baabe (diff) | |
| download | gcc-bf9197df810b0b0ac032c7e480d5a8b24c22f973.tar.gz | |
re PR fortran/57160 (short-circuit IF only with -ffrontend-optimize)
2018-08-10 Janus Weil <janus@gcc.gnu.org>
PR fortran/57160
* invoke.texi (frontend-optimize): Mention short-circuiting.
* options.c (gfc_post_options): Disable -ffrontend-optimize with -Og.
* resolve.c (resolve_operator): Warn about short-circuiting only with
-ffrontend-optimize.
* trans-expr.c (gfc_conv_expr_op): Use short-circuiting operators only
with -ffrontend-optimize. Without that flag, make sure that both
operands are evaluated.
2018-08-10 Janus Weil <janus@gcc.gnu.org>
PR fortran/57160
* gfortran.dg/actual_pointer_function_1.f90: Fix invalid test case.
* gfortran.dg/inline_matmul_23.f90: Add option "-ffrontend-optimize".
* gfortran.dg/short_circuiting_2.f90: New test case.
* gfortran.dg/short_circuiting_3.f90: New test case.
From-SVN: r263471
Diffstat (limited to 'gcc/fortran/invoke.texi')
| -rw-r--r-- | gcc/fortran/invoke.texi | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi index 093864b4097..ee84a0be8b1 100644 --- a/gcc/fortran/invoke.texi +++ b/gcc/fortran/invoke.texi @@ -1793,13 +1793,17 @@ if @option{-ffrontend-optimize} is in effect. @opindex @code{frontend-optimize} @cindex Front-end optimization This option performs front-end optimization, based on manipulating -parts the Fortran parse tree. Enabled by default by any @option{-O} -option. Optimizations enabled by this option include inlining calls -to @code{MATMUL}, elimination of identical function calls within -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}. +parts the Fortran parse tree. Enabled by default by any @option{-O} option +except @option{-O0} and @option{-Og}. Optimizations enabled by this option +include: +@itemize @bullet +@item inlining calls to @code{MATMUL}, +@item elimination of identical function calls within expressions, +@item removing unnecessary calls to @code{TRIM} in comparisons and assignments, +@item replacing @code{TRIM(a)} with @code{a(1:LEN_TRIM(a))} and +@item short-circuiting of logical operators (@code{.AND.} and @code{.OR.}). +@end itemize +It can be deselected by specifying @option{-fno-frontend-optimize}. @item -ffrontend-loop-interchange @opindex @code{frontend-loop-interchange} |