The attach patch has been regression tested on x86_64-*-freebsd.
There were no regression.
The patch prevents an ICE when checking for aliasing and the
actual arguments are the real and imaginary parts of a complex
entity. See the testcase for more information.
OK to commit to both trunk and 9-branch?
2019-07-30 Steven G. Kargl
PR fortran/91296
* interface.c (compare_actual_expr): When checking for aliasing, add
a case to handle REF_INQUIRY (e.g., foo(x%re, x%i) do not alias).
2019-07-30 Steven G. Kargl
PR fortran/91296
* gfortran.dg/pr91296.f90: New test.
--
Steve
Index: gcc/fortran/interface.c
===
--- gcc/fortran/interface.c (revision 273846)
+++ gcc/fortran/interface.c (working copy)
@@ -3489,6 +3489,13 @@ compare_actual_expr (gfc_expr *e1, gfc_expr *e2)
case REF_SUBSTRING:
return false;
+ case REF_INQUIRY:
+ if (e1->symtree->n.sym->ts.type == BT_COMPLEX
+ && e1->ts.type == BT_REAL && e2->ts.type == BT_REAL
+ && r1->u.i != r2->u.i)
+ return false;
+ break;
+
default:
gfc_internal_error ("compare_actual_expr(): Bad component code");
}
Index: gcc/testsuite/gfortran.dg/pr91296.f90
===
--- gcc/testsuite/gfortran.dg/pr91296.f90 (nonexistent)
+++ gcc/testsuite/gfortran.dg/pr91296.f90 (working copy)
@@ -0,0 +1,27 @@
+! { dg-do compile }
+! { dg-options "-Waliasing" }
+! PR fortran/91296
+! Code contributed by Chinoune Mehdi
+module m
+ implicit none
+ integer, parameter :: sp = selected_real_kind(6)
+
+contains
+ pure subroutine s(a,b,c)
+real(sp), intent(in) :: a, b
+real(sp), intent(out) :: c
+c = a + b
+ end subroutine s
+end module m
+
+program test
+ use m
+ implicit none
+ real(sp) :: a
+ complex(sp) :: c
+
+ c = (1._sp,1._sp)
+ call s(c%re,c%im,a) ! *** This use to cause an ICE. ***
+ print*,a
+
+end program test
