[Bug libfortran/112371] Wrong upper bound for the result of reduction intrinsics if the array is empty
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112371 Mikael Morin changed: What|Removed |Added Resolution|--- |FIXED Status|ASSIGNED|RESOLVED --- Comment #7 from Mikael Morin --- Fixed for gfortran 14.1, closing.
[Bug libfortran/112371] Wrong upper bound for the result of reduction intrinsics if the array is empty
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112371 --- Comment #6 from CVS Commits --- The master branch has been updated by Mikael Morin : https://gcc.gnu.org/g:62715bf891979cfb8c6684fdcd65b06a28bbbf5c commit r14-5246-g62715bf891979cfb8c6684fdcd65b06a28bbbf5c Author: Mikael Morin Date: Tue Nov 7 11:24:04 2023 +0100 libgfortran: Remove empty array descriptor first dimension overwrite [PR112371] Remove the forced overwrite of the first dimension of the result array descriptor to set it to zero extent, in the function templates for transformational functions doing an array reduction along a dimension. This overwrite, which happened before early returning in case the result array was empty, was wrong because an array may have a non-zero extent in the first dimension and still be empty if it has a zero extent in a higher dimension. Overwriting the dimension was resulting in wrong array result upper bound for the first dimension in that case. The offending piece of code was present in several places, and this removes them all. More precisely, there is only one case to fix for logical reduction functions, and there are three cases for other reduction functions, corresponding to non-masked reduction, reduction with array mask, and reduction with scalar mask. The impacted m4 files are ifunction_logical.m4 for logical reduction functions, ifunction.m4 for regular functions and types, ifunction-s.m4 for character minloc and maxloc, ifunction-s2.m4 for character minval and maxval, and ifindloc1.m4 for findloc. PR fortran/112371 libgfortran/ChangeLog: * m4/ifunction.m4 (START_ARRAY_FUNCTION, START_MASKED_ARRAY_FUNCTION, SCALAR_ARRAY_FUNCTION): Remove overwrite of the first dimension of the array descriptor. * m4/ifunction-s.m4 (START_ARRAY_FUNCTION, START_MASKED_ARRAY_FUNCTION, SCALAR_ARRAY_FUNCTION): Ditto. * m4/ifunction-s2.m4 (START_ARRAY_FUNCTION, START_MASKED_ARRAY_FUNCTION, SCALAR_ARRAY_FUNCTION): Ditto. * m4/ifunction_logical.m4 (START_ARRAY_FUNCTION): Ditto. * m4/ifindloc1.m4: Ditto. * generated/all_l1.c: Regenerate. * generated/all_l16.c: Regenerate. * generated/all_l2.c: Regenerate. * generated/all_l4.c: Regenerate. * generated/all_l8.c: Regenerate. * generated/any_l1.c: Regenerate. * generated/any_l16.c: Regenerate. * generated/any_l2.c: Regenerate. * generated/any_l4.c: Regenerate. * generated/any_l8.c: Regenerate. * generated/count_16_l.c: Regenerate. * generated/count_1_l.c: Regenerate. * generated/count_2_l.c: Regenerate. * generated/count_4_l.c: Regenerate. * generated/count_8_l.c: Regenerate. * generated/findloc1_c10.c: Regenerate. * generated/findloc1_c16.c: Regenerate. * generated/findloc1_c17.c: Regenerate. * generated/findloc1_c4.c: Regenerate. * generated/findloc1_c8.c: Regenerate. * generated/findloc1_i1.c: Regenerate. * generated/findloc1_i16.c: Regenerate. * generated/findloc1_i2.c: Regenerate. * generated/findloc1_i4.c: Regenerate. * generated/findloc1_i8.c: Regenerate. * generated/findloc1_r10.c: Regenerate. * generated/findloc1_r16.c: Regenerate. * generated/findloc1_r17.c: Regenerate. * generated/findloc1_r4.c: Regenerate. * generated/findloc1_r8.c: Regenerate. * generated/findloc1_s1.c: Regenerate. * generated/findloc1_s4.c: Regenerate. * generated/iall_i1.c: Regenerate. * generated/iall_i16.c: Regenerate. * generated/iall_i2.c: Regenerate. * generated/iall_i4.c: Regenerate. * generated/iall_i8.c: Regenerate. * generated/iany_i1.c: Regenerate. * generated/iany_i16.c: Regenerate. * generated/iany_i2.c: Regenerate. * generated/iany_i4.c: Regenerate. * generated/iany_i8.c: Regenerate. * generated/iparity_i1.c: Regenerate. * generated/iparity_i16.c: Regenerate. * generated/iparity_i2.c: Regenerate. * generated/iparity_i4.c: Regenerate. * generated/iparity_i8.c: Regenerate. * generated/maxloc1_16_i1.c: Regenerate. * generated/maxloc1_16_i16.c: Regenerate. * generated/maxloc1_16_i2.c: Regenerate. * generated/maxloc1_16_i4.c: Regenerate. * generated/maxloc1_16_i8.c: Regenerate. * generated/maxloc1_16_r10.c: Regenerate. * generated/maxloc1_16_r16.c: Regenerate. * generated/maxloc1_16_r17.c: Regenerate. *
[Bug libfortran/112371] Wrong upper bound for the result of reduction intrinsics if the array is empty
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112371 --- Comment #5 from CVS Commits --- The master branch has been updated by Mikael Morin : https://gcc.gnu.org/g:85a9688180a5523ae1704119978f3d634493300f commit r14-5245-g85a9688180a5523ae1704119978f3d634493300f Author: Mikael Morin Date: Tue Nov 7 11:24:03 2023 +0100 libgfortran: Remove early return if extent is zero [PR112371] Remove the early return present in function templates for transformational functions doing a (masked) reduction of an array along a dimension. This early return, which triggered if the extent in the reduction dimension was zero, was wrong because even if the reduction operation degenerates to a constant value in that case, one has to loop anyway along the other dimensions to initialize every element of the resulting array with that constant value. The case of negative extent (not sure whether it may happen in practice) which was also early returning, is handled by clamping to zero. The offending piece of code was present in several places, and this removes them all. Namely, the impacted m4 files are ifunction.m4 for regular functions and types, ifunction-s.m4 for character minloc and maxloc, and ifunction-s2.m4 for character minval and maxval. PR fortran/112371 libgfortran/ChangeLog: * m4/ifunction.m4 (START_MASKED_ARRAY_FUNCTION): Remove early return if extent is zero or less, and clamp negative value to zero. * m4/ifunction-s.m4 (START_MASKED_ARRAY_FUNCTION): Ditto. * m4/ifunction-s2.m4 (START_MASKED_ARRAY_FUNCTION): Ditto. * generated/iall_i1.c: Regenerate. * generated/iall_i16.c: Regenerate. * generated/iall_i2.c: Regenerate. * generated/iall_i4.c: Regenerate. * generated/iall_i8.c: Regenerate. * generated/iany_i1.c: Regenerate. * generated/iany_i16.c: Regenerate. * generated/iany_i2.c: Regenerate. * generated/iany_i4.c: Regenerate. * generated/iany_i8.c: Regenerate. * generated/iparity_i1.c: Regenerate. * generated/iparity_i16.c: Regenerate. * generated/iparity_i2.c: Regenerate. * generated/iparity_i4.c: Regenerate. * generated/iparity_i8.c: Regenerate. * generated/maxloc1_16_i1.c: Regenerate. * generated/maxloc1_16_i16.c: Regenerate. * generated/maxloc1_16_i2.c: Regenerate. * generated/maxloc1_16_i4.c: Regenerate. * generated/maxloc1_16_i8.c: Regenerate. * generated/maxloc1_16_r10.c: Regenerate. * generated/maxloc1_16_r16.c: Regenerate. * generated/maxloc1_16_r17.c: Regenerate. * generated/maxloc1_16_r4.c: Regenerate. * generated/maxloc1_16_r8.c: Regenerate. * generated/maxloc1_16_s1.c: Regenerate. * generated/maxloc1_16_s4.c: Regenerate. * generated/maxloc1_4_i1.c: Regenerate. * generated/maxloc1_4_i16.c: Regenerate. * generated/maxloc1_4_i2.c: Regenerate. * generated/maxloc1_4_i4.c: Regenerate. * generated/maxloc1_4_i8.c: Regenerate. * generated/maxloc1_4_r10.c: Regenerate. * generated/maxloc1_4_r16.c: Regenerate. * generated/maxloc1_4_r17.c: Regenerate. * generated/maxloc1_4_r4.c: Regenerate. * generated/maxloc1_4_r8.c: Regenerate. * generated/maxloc1_4_s1.c: Regenerate. * generated/maxloc1_4_s4.c: Regenerate. * generated/maxloc1_8_i1.c: Regenerate. * generated/maxloc1_8_i16.c: Regenerate. * generated/maxloc1_8_i2.c: Regenerate. * generated/maxloc1_8_i4.c: Regenerate. * generated/maxloc1_8_i8.c: Regenerate. * generated/maxloc1_8_r10.c: Regenerate. * generated/maxloc1_8_r16.c: Regenerate. * generated/maxloc1_8_r17.c: Regenerate. * generated/maxloc1_8_r4.c: Regenerate. * generated/maxloc1_8_r8.c: Regenerate. * generated/maxloc1_8_s1.c: Regenerate. * generated/maxloc1_8_s4.c: Regenerate. * generated/maxval1_s1.c: Regenerate. * generated/maxval1_s4.c: Regenerate. * generated/maxval_i1.c: Regenerate. * generated/maxval_i16.c: Regenerate. * generated/maxval_i2.c: Regenerate. * generated/maxval_i4.c: Regenerate. * generated/maxval_i8.c: Regenerate. * generated/maxval_r10.c: Regenerate. * generated/maxval_r16.c: Regenerate. * generated/maxval_r17.c: Regenerate. * generated/maxval_r4.c: Regenerate. * generated/maxval_r8.c: Regenerate. * generated/minloc1_16_i1.c: Regenerate. * generated/minloc1_16_i16.c: Regenerate. *
[Bug libfortran/112371] Wrong upper bound for the result of reduction intrinsics if the array is empty
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112371 Mikael Morin changed: What|Removed |Added Status|UNCONFIRMED |ASSIGNED Ever confirmed|0 |1 Last reconfirmed||2023-11-08 Assignee|unassigned at gcc dot gnu.org |mikael at gcc dot gnu.org Component|fortran |libfortran --- Comment #4 from Mikael Morin --- Patches submitted (and accepted): https://gcc.gnu.org/pipermail/fortran/2023-November/059904.html https://gcc.gnu.org/pipermail/gcc-patches/2023-November/635518.html
