OpenMP: Document ompx warnings + add Fortran omx warning [PR106670] omp/ompx sentinels are for vendor extensions; as they might be required for the correctness of the program, a warning should be printable. This patch documents in the OpenMP 5.2 table the existing warnings, including the new warning for for fixed source form Fortran. PR fortran/106670 gcc/fortran/ChangeLog: * scanner.cc (skip_fixed_omp_sentinel): Add -Wsurprising warning for 'omx' sentinels with -fopenmp. * invoke.texi (-Wsurprising): Document additional warning case. libgomp/ChangeLog: * libgomp.texi (OpenMP 5.2): Add comment to ompx/omx entry. gcc/testsuite/ChangeLog: * c-c++-common/gomp/ompx-1.c: New test. * c-c++-common/gomp/ompx-2.c: New test. * g++.dg/gomp/ompx-attrs-1.C: New test. * gfortran.dg/gomp/ompx-1.f90: New test. * gfortran.dg/gomp/omx-1.f: New test. * gfortran.dg/gomp/omx-2.f: New test. gcc/fortran/invoke.texi | 5 +++++ gcc/fortran/scanner.cc | 8 ++++++-- gcc/testsuite/c-c++-common/gomp/ompx-1.c | 4 ++++ gcc/testsuite/c-c++-common/gomp/ompx-2.c | 5 +++++ gcc/testsuite/g++.dg/gomp/ompx-attrs-1.C | 7 +++++++ gcc/testsuite/gfortran.dg/gomp/ompx-1.f90 | 2 ++ gcc/testsuite/gfortran.dg/gomp/omx-1.f | 7 +++++++ gcc/testsuite/gfortran.dg/gomp/omx-2.f | 9 +++++++++ libgomp/libgomp.texi | 8 +++++++- 9 files changed, 52 insertions(+), 3 deletions(-) diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi index 4d1e0d6b513..58502d38ac8 100644 --- a/gcc/fortran/invoke.texi +++ b/gcc/fortran/invoke.texi @@ -1092,6 +1092,11 @@ The type of a function result is declared more than once with the same type. If @item A @code{CHARACTER} variable is declared with negative length. + +@item +With @option{-fopenmp}, for fixed-form source code, when an @code{omx} +vendor-extension sentinel is encountered. (The equivalent @code{ompx}, +used in free-form source code, is diagnosed by default.) @end itemize @item -Wtabs diff --git a/gcc/fortran/scanner.cc b/gcc/fortran/scanner.cc index 2dff2514700..fa1d9cba394 100644 --- a/gcc/fortran/scanner.cc +++ b/gcc/fortran/scanner.cc @@ -982,8 +982,9 @@ static bool skip_fixed_omp_sentinel (locus *start) { gfc_char_t c; - if (((c = next_char ()) == 'm' || c == 'M') - && ((c = next_char ()) == 'p' || c == 'P')) + if ((c = next_char ()) != 'm' && c != 'M') + return false; + if ((c = next_char ()) == 'p' || c == 'P') { c = next_char (); if (c != '\n' @@ -1005,6 +1006,9 @@ skip_fixed_omp_sentinel (locus *start) } } } + else if (UNLIKELY (c == 'x' || c == 'X')) + gfc_warning_now (OPT_Wsurprising, + "Ignoring '!$omx' vendor-extension sentinel at %C"); return false; } diff --git a/gcc/testsuite/c-c++-common/gomp/ompx-1.c b/gcc/testsuite/c-c++-common/gomp/ompx-1.c new file mode 100644 index 00000000000..9758d0f0cae --- /dev/null +++ b/gcc/testsuite/c-c++-common/gomp/ompx-1.c @@ -0,0 +1,4 @@ +void f(void) +{ + #pragma ompx some_vendor_extension +} diff --git a/gcc/testsuite/c-c++-common/gomp/ompx-2.c b/gcc/testsuite/c-c++-common/gomp/ompx-2.c new file mode 100644 index 00000000000..4b66b0e2b1c --- /dev/null +++ b/gcc/testsuite/c-c++-common/gomp/ompx-2.c @@ -0,0 +1,5 @@ +/* { dg-additional-options "-Wunknown-pragmas" } */ +void f(void) +{ + #pragma ompx some_vendor_extension /* { dg-warning "-:ignoring '#pragma ompx some_vendor_extension'" } */ +} diff --git a/gcc/testsuite/g++.dg/gomp/ompx-attrs-1.C b/gcc/testsuite/g++.dg/gomp/ompx-attrs-1.C new file mode 100644 index 00000000000..2e9fc0b591f --- /dev/null +++ b/gcc/testsuite/g++.dg/gomp/ompx-attrs-1.C @@ -0,0 +1,7 @@ +// { dg-do compile { target c++11 } } + +void +foo () +{ + [[ompx::directive(some_vendor_extension)]]; /* { dg-warning "attributes at the beginning of statement are ignored" } */ +} diff --git a/gcc/testsuite/gfortran.dg/gomp/ompx-1.f90 b/gcc/testsuite/gfortran.dg/gomp/ompx-1.f90 new file mode 100644 index 00000000000..e5dc6520fd4 --- /dev/null +++ b/gcc/testsuite/gfortran.dg/gomp/ompx-1.f90 @@ -0,0 +1,2 @@ +!$ompx foo ! { dg-warning "!.OMP at .1. starts a commented line as it neither is followed by a space nor is a continuation line" } +end diff --git a/gcc/testsuite/gfortran.dg/gomp/omx-1.f b/gcc/testsuite/gfortran.dg/gomp/omx-1.f new file mode 100644 index 00000000000..4febf8908bf --- /dev/null +++ b/gcc/testsuite/gfortran.dg/gomp/omx-1.f @@ -0,0 +1,7 @@ +!$omx foo +!$OMX foo +c$oMx foo +c$OMx foo +*$oMx foo +*$OMx foo + end diff --git a/gcc/testsuite/gfortran.dg/gomp/omx-2.f b/gcc/testsuite/gfortran.dg/gomp/omx-2.f new file mode 100644 index 00000000000..3c107d98367 --- /dev/null +++ b/gcc/testsuite/gfortran.dg/gomp/omx-2.f @@ -0,0 +1,9 @@ +! { dg-additional-options "-Wsurprising" } + +!$omx foo ! { dg-warning "Ignoring '!.omx' vendor-extension sentinel" } +!$OMX foo ! { dg-warning "Ignoring '!.omx' vendor-extension sentinel" } +c$oMx foo ! { dg-warning "Ignoring '!.omx' vendor-extension sentinel" } +c$OMx foo ! { dg-warning "Ignoring '!.omx' vendor-extension sentinel" } +*$oMx foo ! { dg-warning "Ignoring '!.omx' vendor-extension sentinel" } +*$OMx foo ! { dg-warning "Ignoring '!.omx' vendor-extension sentinel" } + end diff --git a/libgomp/libgomp.texi b/libgomp/libgomp.texi index 0f2998cf8f1..6298de8254c 100644 --- a/libgomp/libgomp.texi +++ b/libgomp/libgomp.texi @@ -359,7 +359,13 @@ to address of matching mapped list item per 5.1, Sect. 2.21.7.2 @tab N @tab @item @code{omp_in_explicit_task} routine and @emph{implicit-task-var} ICV @tab N @tab @item @code{omp}/@code{ompx}/@code{omx} sentinels and @code{omp_}/@code{ompx_} - namespaces @tab N/A @tab + namespaces @tab N/A + @tab warning for @code{omp/ompx} sentinels@footnote{@code{omp/ompx} + sentinels as C/C++ pragma and C++ attributes are warned for with + @code{-Wunknown-pragmas} (implied by @code{-Wall}) and @code{-Wattributes} + (by default), respectively; for Fortran free-source code, the there is a + warning by default and for fixed-source code with @code{-Wsurprising} + (enabled by @code{-Wall})} @item Clauses on @code{end} directive can be on directive @tab N @tab @item Deprecation of no-argument @code{destroy} clause on @code{depobj} @tab N @tab