[Bug testsuite/122011] New: c-c++-common/ubsan/align-5.c is run multiple times but always at -O2

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122011

            Bug ID: 122011
           Summary: c-c++-common/ubsan/align-5.c is run multiple times but
                    always at -O2
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Keywords: internal-improvement
          Severity: normal
          Priority: P3
         Component: testsuite
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

c-c++-common/ubsan/align-5.c contains:
/* { dg-options "-fno-sanitize=null -fsanitize=alignment -O2" } */

But then it runs multiple times. (e.g.):
```
+FAIL: c-c++-common/ubsan/align-5.c   -O0   scan-assembler-not __ubsan_handle
+FAIL: c-c++-common/ubsan/align-5.c   -O1   scan-assembler-not __ubsan_handle
+FAIL: c-c++-common/ubsan/align-5.c   -O2   scan-assembler-not __ubsan_handle
+FAIL: c-c++-common/ubsan/align-5.c   -O2 -flto -fno-use-linker-plugin
-flto-partition=none   scan-assembler-not __ubsan_handle
+FAIL: c-c++-common/ubsan/align-5.c   -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects   scan-assembler-not __ubsan_handle
+FAIL: c-c++-common/ubsan/align-5.c   -O3 -g   scan-assembler-not
__ubsan_handle
+FAIL: c-c++-common/ubsan/align-5.c   -Os   scan-assembler-not __ubsan_handle
```

(ignore the FAIL it is a bug in my local patches).