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From: "acoplan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/98271] New: ICE in apply_scale, at
 profile-count.h:1082 with large --param=align-loop-iterations
Date: Mon, 14 Dec 2020 11:27:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98271

            Bug ID: 98271
           Summary: ICE in apply_scale, at profile-count.h:1082 with large
                    --param=3Dalign-loop-iterations
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: acoplan at gcc dot gnu.org
  Target Milestone: ---

The following fails:

$ cat test.c
void a() {
  for (;;)
    ;
}

$ aarch64-elf-gcc -c -O --param=3Dalign-loop-iterations=3D11971200960744652=
80
test.c
during RTL pass: alignments
test.c: In function 'a':
test.c:4:1: internal compiler error: in apply_scale, at profile-count.h:1082
    4 | }
      | ^
0x9e0637 profile_count::apply_scale(long, long) const
        /home/alecop01/toolchain/src/gcc/gcc/profile-count.h:1082
0x9e0637 compute_alignments()
        /home/alecop01/toolchain/src/gcc/gcc/final.c:746
0x9e086e execute
        /home/alecop01/toolchain/src/gcc/gcc/final.c:825
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

This appears to the minimum value of align-loop-iterations at which GCC ICEs
here.=