[Bug tree-optimization/120376] New: -fmalloc-dce=0 is not work as expected

[alexey.lapshin at espressif dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120376

            Bug ID: 120376
           Summary: -fmalloc-dce=0 is not work as expected
           Product: gcc
           Version: 15.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: alexey.lapshin at espressif dot com
  Target Milestone: ---

https://godbolt.org/z/9asfj89fr

test app:
// -O2 -fmalloc-dce=0
#include <stdlib.h>
int main() {
    if (malloc(16) == 0)
        return -1;
    return 0;
}


The only way to disable such optimization is to add `-fno-builtin-malloc`,
which seems to me too redundant