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From: "acoplan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/103938] [9/10/11/12 Regression] ICE with
 __builtin_prefetch and vectors
Date: Thu, 07 Apr 2022 09:17:48 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103938

--- Comment #6 from Alex Coplan <acoplan at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> (In reply to Alex Coplan from comment #4)
> > Confirmed on trunk. I can only reproduce the ICE with trunk, not with
> > earlier released versions.
>=20
> Are you sure you configured the previous released versions with
> --enabled-checking=3Dyes ? That is the only way to get the ICE on released
> versions.

Well, I just tried a clean build of the GCC 11 branch with
--enable-checking=3Dyes, and I don't see the ICE there:

$ gcc/xgcc -B gcc -v
Reading specs from gcc/specs
COLLECT_GCC=3Dgcc/xgcc
COLLECT_LTO_WRAPPER=3Dgcc/lto-wrapper
Target: aarch64-linux-gnu
Configured with: /home/alecop01/toolchain/src/gcc/configure
--prefix=3D/data_sdb/toolchain/cc1s/gcc11-aarch64 --enable-languages=3Dc,c++
--disable-bootstrap --target=3Daarch64-linux-gnu --enable-checking=3Dyes
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 11.2.1 20220407 (GCC)
$ cat t.c
typedef unsigned long u64x2 __attribute__ ((vector_size(16)));
void g (u64x2 off)
{
  __builtin_prefetch ((void*)off[0], 0, 3);
}
$ gcc/xgcc -B gcc -c t.c -O2=