https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112371
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Mikael Morin <mik...@gcc.gnu.org>: https://gcc.gnu.org/g:62715bf891979cfb8c6684fdcd65b06a28bbbf5c commit r14-5246-g62715bf891979cfb8c6684fdcd65b06a28bbbf5c Author: Mikael Morin <mik...@gcc.gnu.org> 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. * 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. * generated/minloc1_16_i2.c: Regenerate. * generated/minloc1_16_i4.c: Regenerate. * generated/minloc1_16_i8.c: Regenerate. * generated/minloc1_16_r10.c: Regenerate. * generated/minloc1_16_r16.c: Regenerate. * generated/minloc1_16_r17.c: Regenerate. * generated/minloc1_16_r4.c: Regenerate. * generated/minloc1_16_r8.c: Regenerate. * generated/minloc1_16_s1.c: Regenerate. * generated/minloc1_16_s4.c: Regenerate. * generated/minloc1_4_i1.c: Regenerate. * generated/minloc1_4_i16.c: Regenerate. * generated/minloc1_4_i2.c: Regenerate. * generated/minloc1_4_i4.c: Regenerate. * generated/minloc1_4_i8.c: Regenerate. * generated/minloc1_4_r10.c: Regenerate. * generated/minloc1_4_r16.c: Regenerate. * generated/minloc1_4_r17.c: Regenerate. * generated/minloc1_4_r4.c: Regenerate. * generated/minloc1_4_r8.c: Regenerate. * generated/minloc1_4_s1.c: Regenerate. * generated/minloc1_4_s4.c: Regenerate. * generated/minloc1_8_i1.c: Regenerate. * generated/minloc1_8_i16.c: Regenerate. * generated/minloc1_8_i2.c: Regenerate. * generated/minloc1_8_i4.c: Regenerate. * generated/minloc1_8_i8.c: Regenerate. * generated/minloc1_8_r10.c: Regenerate. * generated/minloc1_8_r16.c: Regenerate. * generated/minloc1_8_r17.c: Regenerate. * generated/minloc1_8_r4.c: Regenerate. * generated/minloc1_8_r8.c: Regenerate. * generated/minloc1_8_s1.c: Regenerate. * generated/minloc1_8_s4.c: Regenerate. * generated/minval1_s1.c: Regenerate. * generated/minval1_s4.c: Regenerate. * generated/minval_i1.c: Regenerate. * generated/minval_i16.c: Regenerate. * generated/minval_i2.c: Regenerate. * generated/minval_i4.c: Regenerate. * generated/minval_i8.c: Regenerate. * generated/minval_r10.c: Regenerate. * generated/minval_r16.c: Regenerate. * generated/minval_r17.c: Regenerate. * generated/minval_r4.c: Regenerate. * generated/minval_r8.c: Regenerate. * generated/norm2_r10.c: Regenerate. * generated/norm2_r16.c: Regenerate. * generated/norm2_r17.c: Regenerate. * generated/norm2_r4.c: Regenerate. * generated/norm2_r8.c: Regenerate. * generated/parity_l1.c: Regenerate. * generated/parity_l16.c: Regenerate. * generated/parity_l2.c: Regenerate. * generated/parity_l4.c: Regenerate. * generated/parity_l8.c: Regenerate. * generated/product_c10.c: Regenerate. * generated/product_c16.c: Regenerate. * generated/product_c17.c: Regenerate. * generated/product_c4.c: Regenerate. * generated/product_c8.c: Regenerate. * generated/product_i1.c: Regenerate. * generated/product_i16.c: Regenerate. * generated/product_i2.c: Regenerate. * generated/product_i4.c: Regenerate. * generated/product_i8.c: Regenerate. * generated/product_r10.c: Regenerate. * generated/product_r16.c: Regenerate. * generated/product_r17.c: Regenerate. * generated/product_r4.c: Regenerate. * generated/product_r8.c: Regenerate. * generated/sum_c10.c: Regenerate. * generated/sum_c16.c: Regenerate. * generated/sum_c17.c: Regenerate. * generated/sum_c4.c: Regenerate. * generated/sum_c8.c: Regenerate. * generated/sum_i1.c: Regenerate. * generated/sum_i16.c: Regenerate. * generated/sum_i2.c: Regenerate. * generated/sum_i4.c: Regenerate. * generated/sum_i8.c: Regenerate. * generated/sum_r10.c: Regenerate. * generated/sum_r16.c: Regenerate. * generated/sum_r17.c: Regenerate. * generated/sum_r4.c: Regenerate. * generated/sum_r8.c: Regenerate. gcc/testsuite/ChangeLog: * gfortran.dg/bound_11.f90: New test.
