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From: "yancheng.li at foxmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/110079] New: ICE with
 -freorder-blocks-and-partition
Date: Thu, 01 Jun 2023 12:58:41 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: yancheng.li at foxmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110079

            Bug ID: 110079
           Summary: ICE with -freorder-blocks-and-partition
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: yancheng.li at foxmail dot com
  Target Milestone: ---

When compiling the testacse attached with -S -O2 -freorder-blocks-and-parti=
tion
flags, I get the following error:=20

// target=EF=BC=9Aaarch64-linux-gnu
// configure=EF=BC=9A../gcc/configure --prefix=3D/home/lyc/2022/gcc-trunk/i=
nstall
--enable-shared --enable-threads=3Dposix --enable-checking=3Drelease
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-linker-hash-style=3Dgnu --enable-languages=3Dc --enable-plugin
--enable-initfini-array --disable-libgcj --without-isl --without-cloog
--enable-gnu-indirect-function --build=3Daarch64-linux-gnu
--with-stage1-ldflags=3D' -Wl,-z,relro,-z,now' --with-boot-ldflags=3D'
-Wl,-z,relro,-z,now' --disable-bootstrap --with-multilib-list=3Dlp64
// thread model=EF=BC=9Aposix
// gcc version 14.0.0 20230531 (experimental) (GCC)
//
// during RTL pass: outof_cfglayout
// test.c: in function=E2=80=98d=E2=80=99:
// test.c:12:1: internal compiler error=EF=BC=9Ain fixup_reorder_chain=EF=
=BC=8Cat
cfgrtl.cc:4029
//    12 | }
//       | ^
// 0x824a97 fixup_reorder_chain
//      ../../gcc/gcc/cfgrtl.cc:4029
// 0x824a97 cfg_layout_finalize()
//      ../../gcc/gcc/cfgrtl.cc:4571
// 0x824d5f execute
//      ../../gcc/gcc/cfgrtl.cc:3753
// Please submit a full bug report, with preprocessed source.
// Please include the complete backtrace with any bug report.

// /home/lyc/2022/gcc-trunk/install/libexec/gcc/aarch64-linux-gnu/14.0.0/cc1
-quiet test.c -quiet -dumpbase test.c -dumpbase-ext .c -mlittle-endian
-mabi=3Dlp64 -O2 -freorder-blocks-and-partition -freport-bug -o - -frandom-=
seed=3D0
-fdump-noaddr

# 0 "test.c"
# 0 "<built-in>"
# 0 "<=E5=91=BD=E4=BB=A4=E8=A1=8C>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 0 "<=E5=91=BD=E4=BB=A4=E8=A1=8C>" 2
# 1 "test.c"
int a;
__attribute__((__cold__)) int b(char *);
void d(void) {
e:
  for (; a;)
    ;
  b("");
  asm goto("" : : : : c);
  asm("");
c:
  goto e;
}=