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From: "yshuiv7 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/114566] New: Misaligned vmovaps when compiling libvorbis for
 znver4
Date: Tue, 02 Apr 2024 18:19:07 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: 13.2.0
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: yshuiv7 at gmail dot com
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114566

            Bug ID: 114566
           Summary: Misaligned vmovaps when compiling libvorbis for znver4
           Product: gcc
           Version: 13.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: yshuiv7 at gmail dot com
  Target Milestone: ---

Haven't tried to minimize it yet, but here is how to reproduce it:

1. Download libvorbis 1.3.7 source: https://github.com/xiph/vorbis/tree/v1.=
3.7
2. Configure it:=20
       cmake -B build -DCMAKE_C_FLAGS=3D"-march=3Dznver4 -mtune=3Dznver4"
-DCMAKE_CXX_FLAGS=3D"-march=3Dznver4 -mtune=3Dznver4" -DCMAKE_BUILD_TYPE=3D=
Release .
3. Run tests:=20
       make -C build test

Stack trace:
#0  0x0000000000410d2e in setup_tone_curves
(curveatt_dB=3Dcurveatt_dB@entry=3D0x4e1834, binHz=3DbinHz@entry=3D86.13281=
25,
    n=3Dn@entry=3D256, center_boost=3D-1.00000203, center_decay_rate=3D<opt=
imized out>)
at /tmp/vorbis/lib/psy.c:129
#1  0x0000000000413b24 in _vp_psy_init (p=3D0x4fe8c0, vi=3D<optimized out>,
gi=3Dgi@entry=3D0x4e0be0, n=3D256,
    rate=3D<optimized out>) at /tmp/vorbis/lib/psy.c:326
#2  0x000000000040a7b5 in _vds_shared_init (v=3Dv@entry=3D0x7fffffffb370,
vi=3Dvi@entry=3D0x7fffffffb330, encp=3Dencp@entry=3D1)
    at /tmp/vorbis/lib/block.c:225
#3  0x000000000040a93f in vorbis_analysis_init (v=3Dv@entry=3D0x7fffffffb37=
0,
vi=3Dvi@entry=3D0x7fffffffb330)
    at /tmp/vorbis/lib/block.c:298
#4  0x0000000000404ad2 in write_vorbis_data_or_die (
    filename=3Dfilename@entry=3D0x7fffffffb700 "vorbis_1ch_q-0.5_44100.ogg",
srate=3Dsrate@entry=3D44100,
    q=3Dq@entry=3D-0.0500000007, data=3Ddata@entry=3D0x4dc080 <data_out>,
count=3Dcount@entry=3D2048, ch=3Dch@entry=3D1)
    at /tmp/vorbis/test/write_read.c:61
#5  0x000000000040456d in main () at /tmp/vorbis/test/test.c:58

Relevant part of the code:

   0x0000000000410cee <+1854>:  add    $0xe0,%rdx
   0x0000000000410cf5 <+1861>:  vmovups %zmm17,-0xe0(%rdx)
   0x0000000000410cff <+1871>:  vaddps -0xa0(%rdx),%zmm7,%zmm17
   0x0000000000410d09 <+1881>:  vmovups %zmm17,-0xa0(%rdx)
   0x0000000000410d13 <+1891>:  vaddps -0x60(%rdx),%zmm6,%zmm17
   0x0000000000410d1d <+1901>:  vmovups %zmm17,-0x60(%rdx)
   0x0000000000410d27 <+1911>:  vaddps -0x20(%rdx),%ymm0,%ymm17
=3D> 0x0000000000410d2e <+1918>:  vmovaps %ymm17,-0x20(%rdx)

$rdx is 0x7fffffff3a10=