[Bug tree-optimization/110829] New: [13/14 Regression] FAIL: gcc.dg/pr56837.c scan-tree-dump-times optimized "memset ..c, 68, 16384.;" 1

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110829

            Bug ID: 110829
           Summary: [13/14 Regression] FAIL: gcc.dg/pr56837.c
                    scan-tree-dump-times optimized "memset ..c, 68,
                    16384.;"  1
           Product: gcc
           Version: 13.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

After r13-1762-gf9d4c3b45c5ed5 the 

_Complex double c[N];

void
fc (void)
{
  int i;
  for (i = 0; i < N; i++)
    c[i] = 747708026454360457216.0 + 747708026454360457216.0i;
}

part of the testcase fails to be recognized as memset since we lower
the complex store to a component-wise store to enable vectorization.

loop distribution doesn't yet handle merging stores as part of
its pattern recognition for memset, memcpy or memmove.