[pushed] PR/fortran 104227 - [9/10/11/12 Regression] ICE virtual memory exhausted: Cannot allocate memory

[Harald Anlauf <anlauf@gmx.de>]

[-- Attachment #1: Type: text/plain, Size: 382 bytes --]

Dear Fortranners,

committed as obvious after regtesting on x86_64-pc-linux-gnu.

We already had a check for the MOLD argument to the TRANSFER
intrinsic for having storage size 0, which failed if MOLD was
an EXPR_VARIABLE although having rank != 0.  Duh.
Adjusting that check fixed the issue.

I intend to backport to the affected branches after some
waiting time.

Thanks,
Harald


[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: pr104227.diff --]
[-- Type: text/x-patch, Size: 2020 bytes --]

From ec543c9833c2d9283c035cd8430849eb4ec04406 Mon Sep 17 00:00:00 2001
From: Harald Anlauf <anlauf@gmx.de>
Date: Tue, 25 Jan 2022 21:56:39 +0100
Subject: [PATCH] Fortran: MOLD argument to TRANSFER intrinsic having storage
 size zero

gcc/fortran/ChangeLog:

	PR fortran/104227
	* check.cc (gfc_calculate_transfer_sizes): Fix checking of arrays
	passed as MOLD argument to the TRANSFER intrinsic for having
	storage size zero.

gcc/testsuite/ChangeLog:

	PR fortran/104227
	* gfortran.dg/transfer_check_6.f90: New test.
---
 gcc/fortran/check.cc                           |  2 +-
 gcc/testsuite/gfortran.dg/transfer_check_6.f90 | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gfortran.dg/transfer_check_6.f90

diff --git a/gcc/fortran/check.cc b/gcc/fortran/check.cc
index 4fa05ee7e9b..d6c6767ae9e 100644
--- a/gcc/fortran/check.cc
+++ b/gcc/fortran/check.cc
@@ -6151,7 +6151,7 @@ gfc_calculate_transfer_sizes (gfc_expr *source, gfc_expr *mold, gfc_expr *size,
    * If SIZE is present, the result is an array of rank one and size SIZE.
    */
   if (result_elt_size == 0 && *source_size > 0 && !size
-      && mold->expr_type == EXPR_ARRAY)
+      && (mold->expr_type == EXPR_ARRAY || mold->rank))
     {
       gfc_error ("%<MOLD%> argument of %<TRANSFER%> intrinsic at %L is an "
 		 "array and shall not have storage size 0 when %<SOURCE%> "
diff --git a/gcc/testsuite/gfortran.dg/transfer_check_6.f90 b/gcc/testsuite/gfortran.dg/transfer_check_6.f90
new file mode 100644
index 00000000000..dffd0913f0d
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/transfer_check_6.f90
@@ -0,0 +1,11 @@
+! { dg-do compile }
+! PR fortran/104227 - ICE virtual memory exhausted
+! Contributed by G.Steinmetz
+
+program p
+  type t
+  end type
+  type(t) :: x(2)
+  print *, transfer(1, x) ! { dg-error "shall not have storage size 0" }
+  x = transfer(1, x)      ! { dg-error "shall not have storage size 0" }
+end
--
2.31.1