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From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88309] [11/12/13/14 Regression] ICE: Floating point
 exception (in is_miss_rate_acceptable), target assigning alignent of 4
 bits(!) to vector
Date: Tue, 02 Apr 2024 08:36:48 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D88309

Kewen Lin <linkw at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |linkw at gcc dot gnu.org

--- Comment #4 from Kewen Lin <linkw at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> Found it:
> 	/* In GIMPLE the type of the MEM_REF specifies the alignment.  The
> 	  required alignment (power) is 4 bytes regardless of data type.  */
> 	tree align_ltype =3D build_aligned_type (lhs_type, 4);
>=20
> That should be 4*8 instead of just 4.
>=20
> There are 2 build_aligned_type in rs6000-builtins.cc which uses the wrong
> alignment; thinking it was the alignment argument was bytes rather than b=
its.
>=20
> Introduced by r9-2375-g3f7a77cd20d07c which means this is a regression.

Hi Andrew, thanks for digging into this!  William has not worked on GCC pro=
ject
any more, will you make a patch for this?=