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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/109137] [12/13 regression] Compiling ffmpeg with -m32 on
 x86_64-pc-linux-gnu hangs on libavcodec/h264_cabac.c since
 r12-9086-g489c81db7d4f75
Date: Thu, 16 Mar 2023 10:03:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109137

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |vmakarov at gcc dot gnu.org

--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I don't see any hangs.
With just -O3 -m32 -march=3Dznver1 both latest GCC 12 branch and latest tru=
nk
print the 4
error: =E2=80=98asm=E2=80=99 operand has impossible constraints
errors and exits, with -fpie additionally there is an ICE:
during RTL pass: reload
src/libavcodec/h264_cabac.c: In function =E2=80=98ff_h264_decode_mb_cabac=
=E2=80=99:
src/libavcodec/h264_cabac.c:2490:1: internal compiler error: maximum number=
 of
LRA assignment passes is achieved (30)
0x1213bde lra_assign(bool&)
        ../../gcc/lra-assigns.cc:1694
0x120e5b2 lra(_IO_FILE*)
        ../../gcc/lra.cc:2426
0x11bf889 do_reload
        ../../gcc/ira.cc:5963
0x11bf889 execute
        ../../gcc/ira.cc:6149
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

CCing Vlad for possible better error recovery here.=