[Bug sanitizer/82183] New: gcc.dg/sancov/cmp0.c fails on aarch64

[sje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82183

            Bug ID: 82183
           Summary: gcc.dg/sancov/cmp0.c fails on aarch64
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sje at gcc dot gnu.org
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, jakub at redhat dot com, kcc at gcc dot gnu.org,
                    marxin at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64

The new test, gcc.dg/sancov/cmp0.c, is failing on aarch64.
The failures I get are:

FAIL: gcc.dg/sancov/cmp0.c   -O0   scan-tree-dump-times optimized
"__builtin___s
anitizer_cov_trace_const_cmp" 7
FAIL: gcc.dg/sancov/cmp0.c   -O0   scan-tree-dump-times optimized
"__builtin___s
anitizer_cov_trace_switch \\(" 2
FAIL: gcc.dg/sancov/cmp0.c   -O0 -g   scan-tree-dump-times optimized
"__builtin_
__sanitizer_cov_trace_const_cmp" 7
FAIL: gcc.dg/sancov/cmp0.c   -O0 -g   scan-tree-dump-times optimized
"__builtin_
__sanitizer_cov_trace_switch \\(" 2

When I look at the cmp0.c.229t.optimized file I see 23 calls to
__builtin___sanitizer_cov_trace_const_cmp[1248] and no calls to
__builtin___sanitizer_cov_trace_switch.  I think GCC on aarch64
turned the switch statement into a series of if's.

I am not sure if any other platforms are affected by this.