From: Steven G. Kargl <kargl@gcc.gnu.org>
Date: Tue, 30 Jul 2019 21:38:48 +0000 (+0000)
Subject: re PR fortran/91296 (ICE when passing complex number %re/%im as a procedure argument... 
X-Git-Tag: releases/gcc-9.2.0~94
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=de61fb689a08922a51dd953b37687d78436efff0;p=thirdparty%2Fgcc.git

re PR fortran/91296 (ICE when passing complex number %re/%im as a procedure argument with -Waliasing.)

2019-07-30  Steven G. Kargl  <kargl@gcc.gnu.org>

	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%im) do not alias).

2019-07-30  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/91296
	* gfortran.dg/pr91296.f90: New test.

From-SVN: r273916
---

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index c7a3df6bc590..c7162f19b736 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,9 @@
+2019-07-30  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	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%im) do not alias).
+
 2019-07-29  Thomas Koenig  <tkoenig@gcc.gnu.org>
 	Paul Thomas <pault@gcc.gnu.org>
 
diff --git a/gcc/fortran/interface.c b/gcc/fortran/interface.c
index e7aebbcf9871..bee98129bc1b 100644
--- a/gcc/fortran/interface.c
+++ b/gcc/fortran/interface.c
@@ -3488,6 +3488,13 @@ 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");
 	}
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 643e3e5a5cda..8765c2c44226 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-07-30  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/91296
+	* gfortran.dg/pr91296.f90: New test.
+
 2019-07-29  Thomas Koenig  <tkoenig@gcc.gnu.org>
 	Paul Thomas <pault@gcc.gnu.org>
 
diff --git a/gcc/testsuite/gfortran.dg/pr91296.f90 b/gcc/testsuite/gfortran.dg/pr91296.f90
new file mode 100644
index 000000000000..5f7bb0e70d3d
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr91296.f90
@@ -0,0 +1,27 @@
+! { dg-do compile }
+! { dg-options "-Waliasing" }
+! PR fortran/91296
+! Code contributed by Chinoune Mehdi <chinoune dot medhi at hotmail dot com> 
+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