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From: Harald Anlauf <anlauf@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r9-9863] Fortran: perform array subscript checks only for valid INTEGER bounds Date: Fri, 10 Dec 2021 18:32:26 +0000 (GMT) [thread overview] Message-ID: <20211210183226.021F83858031@sourceware.org> (raw) https://gcc.gnu.org/g:8b1dae4d33285643c5f51d828aa6f31ffbfc33b7 commit r9-9863-g8b1dae4d33285643c5f51d828aa6f31ffbfc33b7 Author: Harald Anlauf <anlauf@gmx.de> Date: Tue Dec 7 21:34:31 2021 +0100 Fortran: perform array subscript checks only for valid INTEGER bounds gcc/fortran/ChangeLog: PR fortran/103607 * frontend-passes.c (do_subscript): Ensure that array bounds are of type INTEGER before performing checks on array subscripts. gcc/testsuite/ChangeLog: PR fortran/103607 * gfortran.dg/pr103607.f90: New test. (cherry picked from commit 9eec77c0df9e5c67454a2e8f83246104458ba4f0) Diff: --- gcc/fortran/frontend-passes.c | 4 ++++ gcc/testsuite/gfortran.dg/pr103607.f90 | 12 ++++++++++++ 2 files changed, 16 insertions(+) diff --git a/gcc/fortran/frontend-passes.c b/gcc/fortran/frontend-passes.c index 46be96c1a22..dba21517972 100644 --- a/gcc/fortran/frontend-passes.c +++ b/gcc/fortran/frontend-passes.c @@ -2679,6 +2679,7 @@ do_subscript (gfc_expr **e) { if (ar->as->lower[i] && ar->as->lower[i]->expr_type == EXPR_CONSTANT + && ar->as->lower[i]->ts.type == BT_INTEGER && mpz_cmp (val, ar->as->lower[i]->value.integer) < 0) gfc_warning (warn, "Array reference at %L out of bounds " "(%ld < %ld) in loop beginning at %L", @@ -2688,6 +2689,7 @@ do_subscript (gfc_expr **e) if (ar->as->upper[i] && ar->as->upper[i]->expr_type == EXPR_CONSTANT + && ar->as->upper[i]->ts.type == BT_INTEGER && mpz_cmp (val, ar->as->upper[i]->value.integer) > 0) gfc_warning (warn, "Array reference at %L out of bounds " "(%ld > %ld) in loop beginning at %L", @@ -2703,6 +2705,7 @@ do_subscript (gfc_expr **e) { if (ar->as->lower[i] && ar->as->lower[i]->expr_type == EXPR_CONSTANT + && ar->as->lower[i]->ts.type == BT_INTEGER && mpz_cmp (val, ar->as->lower[i]->value.integer) < 0) gfc_warning (warn, "Array reference at %L out of bounds " "(%ld < %ld) in loop beginning at %L", @@ -2712,6 +2715,7 @@ do_subscript (gfc_expr **e) if (ar->as->upper[i] && ar->as->upper[i]->expr_type == EXPR_CONSTANT + && ar->as->upper[i]->ts.type == BT_INTEGER && mpz_cmp (val, ar->as->upper[i]->value.integer) > 0) gfc_warning (warn, "Array reference at %L out of bounds " "(%ld > %ld) in loop beginning at %L", diff --git a/gcc/testsuite/gfortran.dg/pr103607.f90 b/gcc/testsuite/gfortran.dg/pr103607.f90 new file mode 100644 index 00000000000..a6a2c4fdfd0 --- /dev/null +++ b/gcc/testsuite/gfortran.dg/pr103607.f90 @@ -0,0 +1,12 @@ +! { dg-do compile } +! PR fortran/103607 - ICE in do_subscript, at fortran/frontend-passes.c:2927 +! Contributed by G.Steinmetz + +program p + integer :: i, x(abs(2.)) ! { dg-error "must be of INTEGER type" } + do i = 1, 2 + x(i) = 0 + end do +end + +! { dg-prune-output "must have constant shape" }
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