Dear Fortranners,
a check in gfc_calculate_transfer_sizes had a bug in the logic:
it did not trigger for MOLD having a storage size zero when
arugment SIZE was present. The attached obvious patch fixes this.
Regtested on x86_64-pc-linux-gnu. OK for mainline/11/10/9?
Thanks,
Harald
From b8f124adcf258eccd29ffcec5cc3f8915cc2ca47 Mon Sep 17 00:00:00 2001
From: Harald Anlauf
Date: Tue, 1 Feb 2022 23:33:24 +0100
Subject: [PATCH] Fortran: reject simplifying TRANSFER for MOLD with storage
size 0
gcc/fortran/ChangeLog:
PR fortran/104311
* check.cc (gfc_calculate_transfer_sizes): Checks for case when
storage size of SOURCE is greater than zero while the storage size
of MOLD is zero and MOLD is an array shall not depend on SIZE.
gcc/testsuite/ChangeLog:
PR fortran/104311
* gfortran.dg/transfer_simplify_15.f90: New test.
---
gcc/fortran/check.cc | 2 +-
gcc/testsuite/gfortran.dg/transfer_simplify_15.f90 | 11 +++
2 files changed, 12 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gfortran.dg/transfer_simplify_15.f90
diff --git a/gcc/fortran/check.cc b/gcc/fortran/check.cc
index d6c6767ae9e..fc97bb1371e 100644
--- a/gcc/fortran/check.cc
+++ b/gcc/fortran/check.cc
@@ -6150,7 +6150,7 @@ gfc_calculate_transfer_sizes (gfc_expr *source, gfc_expr *mold, gfc_expr *size,
* representation is not shorter than that of SOURCE.
* If SIZE is present, the result is an array of rank one and size SIZE.
*/
- if (result_elt_size == 0 && *source_size > 0 && !size
+ if (result_elt_size == 0 && *source_size > 0
&& (mold->expr_type == EXPR_ARRAY || mold->rank))
{
gfc_error ("% argument of % intrinsic at %L is an "
diff --git a/gcc/testsuite/gfortran.dg/transfer_simplify_15.f90 b/gcc/testsuite/gfortran.dg/transfer_simplify_15.f90
new file mode 100644
index 000..cdbec97ae71
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/transfer_simplify_15.f90
@@ -0,0 +1,11 @@
+! { dg-do compile }
+! PR fortran/104311 - ICE out of memory
+! Contributed by G.Steinmetz
+
+program p
+ type t
+ end type
+ type(t) :: x(2)
+ print *, transfer(1,x,2) ! { dg-error "shall not have storage size 0" }
+ print *, transfer(1,x,huge(1)) ! { dg-error "shall not have storage size 0" }
+end
--
2.34.1
