[gcc r11-10458] Fortran: incorrect array bounds when bound intrinsic used in decl [PR108131]

[Harald Anlauf <anlauf@gcc.gnu.org>]

https://gcc.gnu.org/g:04310741924e7e6ef1ec637a1a9c3e2972345926

commit r11-10458-g04310741924e7e6ef1ec637a1a9c3e2972345926
Author: Harald Anlauf <anlauf@gmx.de>
Date:   Sat Dec 17 22:04:32 2022 +0100

    Fortran: incorrect array bounds when bound intrinsic used in decl [PR108131]
    
    gcc/fortran/ChangeLog:
    
            PR fortran/108131
            * array.c (match_array_element_spec): Avoid too early simplification
            of matched array element specs that can lead to a misinterpretation
            when used as array bounds in array declarations.
    
    gcc/testsuite/ChangeLog:
    
            PR fortran/108131
            * gfortran.dg/pr103505.f90: Adjust expected patterns.
            * gfortran.dg/pr108131.f90: New test.
    
    (cherry picked from commit 6a95f0e0a06d78d94138d4c3dd64d41591197281)

Diff:
---
 gcc/fortran/array.c                    |  4 ----
 gcc/testsuite/gfortran.dg/pr103505.f90 |  8 +++++---
 gcc/testsuite/gfortran.dg/pr108131.f90 | 25 +++++++++++++++++++++++++
 3 files changed, 30 insertions(+), 7 deletions(-)

diff --git a/gcc/fortran/array.c b/gcc/fortran/array.c
index b406f6d1f6e..bb6f2bb9045 100644
--- a/gcc/fortran/array.c
+++ b/gcc/fortran/array.c
@@ -492,8 +492,6 @@ match_array_element_spec (gfc_array_spec *as)
   if (!gfc_expr_check_typed (*upper, gfc_current_ns, false))
     return AS_UNKNOWN;
 
-  gfc_try_simplify_expr (*upper, 0);
-
   if (((*upper)->expr_type == EXPR_CONSTANT
 	&& (*upper)->ts.type != BT_INTEGER) ||
       ((*upper)->expr_type == EXPR_FUNCTION
@@ -526,8 +524,6 @@ match_array_element_spec (gfc_array_spec *as)
   if (!gfc_expr_check_typed (*upper, gfc_current_ns, false))
     return AS_UNKNOWN;
 
-  gfc_try_simplify_expr (*upper, 0);
-
   if (((*upper)->expr_type == EXPR_CONSTANT
 	&& (*upper)->ts.type != BT_INTEGER) ||
       ((*upper)->expr_type == EXPR_FUNCTION
diff --git a/gcc/testsuite/gfortran.dg/pr103505.f90 b/gcc/testsuite/gfortran.dg/pr103505.f90
index 522e53efcb2..01308019b2c 100644
--- a/gcc/testsuite/gfortran.dg/pr103505.f90
+++ b/gcc/testsuite/gfortran.dg/pr103505.f90
@@ -3,7 +3,9 @@
 ! Testcase by G.Steinmetz
 
 program p
-  integer, parameter :: a((2.))   = [4,8] ! { dg-error "scalar INTEGER" }
-  integer, parameter :: z(1:(2.)) = [4,8] ! { dg-error "scalar INTEGER" }
-  print *, a(1:1)                         ! { dg-error "Syntax error" }
+  integer, parameter :: a((2.))   = [4,8] ! { dg-error "INTEGER type" }
+  integer, parameter :: z(1:(2.)) = [4,8] ! { dg-error "INTEGER type" }
+  print *, a(1:1)
 end
+
+! { dg-prune-output "Parameter array" }
diff --git a/gcc/testsuite/gfortran.dg/pr108131.f90 b/gcc/testsuite/gfortran.dg/pr108131.f90
new file mode 100644
index 00000000000..8bf36d361ba
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr108131.f90
@@ -0,0 +1,25 @@
+! { dg-do run }
+! { dg-additional-options "-fdump-tree-original" }
+! PR fortran/108131
+!
+! Incorrect array bounds when bound intrinsic used in declaration
+
+program test
+  implicit none
+  integer, parameter :: mg(7:10)                 = 0
+  integer, parameter :: u =   ubound(mg, dim=1)
+  integer, parameter :: cx(-1:ubound(mg, dim=1)) = 1
+  integer, parameter :: dx(lbound(mg, dim=1):ubound(cx, dim=1)) = 2
+
+  write(*,*) ubound(mg, dim=1)
+  write(*,*) ubound(cx, dim=1)
+  if (u /= 10) stop 1
+  if (ubound(mg, dim=1) /= 10) stop 2
+  if (ubound(cx, dim=1) /= 10) stop 3
+  if (ubound(dx, dim=1) /= 10) stop 4
+  if (lbound(mg, dim=1) /=  7) stop 5
+  if (lbound(cx, dim=1) /= -1) stop 6
+  if (lbound(dx, dim=1) /=  7) stop 7
+end program test
+
+! { dg-final { scan-tree-dump-not "_gfortran_stop_numeric" "original" } }