[PATCH] Fix fallout from VRP strict-overflow changes

[Andreas Schwab]

On Aug 17 2017, Richard Biener <rguenther@suse.de> wrote:

> I was notifed I broke proper handling of undefined overflow in
> multiplicative ops handling.  The following resurrects previous
> behavior (and adds a testcase).
>
> Bootstrapped and tested on x86_64-unknown-linux-gnu, applied to trunk.

This breaks gfortran.dg/alloc_comp_auto_array_2.f90 on aarch64 with
-mabi=ilp32 (only for -O3):

FAIL: gfortran.dg/alloc_comp_auto_array_2.f90   -O3 -g  (test for excess errors)
Excess errors:
/opt/gcc/gcc-20170818/gcc/testsuite/gfortran.dg/alloc_comp_auto_array_2.f90:33:0: Warning: '__builtin_memcpy' specified size between 2147483648 and 4294967295 exceeds maximum object size 2147483647 [-Wstringop-overflow=]

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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