[Bug tree-optimization/120979] New: Missed strdup to malloc + memcpy for known strings

[kaelfandrew at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120979

            Bug ID: 120979
           Summary: Missed strdup to malloc + memcpy for known strings
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kaelfandrew at gmail dot com
  Target Milestone: ---

Created attachment 61810
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61810&action=edit
C code

Flags with -O3.

strdup() shouldn't be called for const strings like "Hello".

Real code that could be optimized include
https://github.com/gcc-mirror/gcc/blob/57d30924e2b3887a1aedc6102daa67bc3272ace7/gcc/config/aarch64/aarch64.cc#L19381

```
static char *
aarch64_offload_options (void)
{
  if (TARGET_ILP32)
    return xstrdup ("-foffload-abi=ilp32 -foffload-abi-host-opts=-mabi=ilp32");
  else
    return xstrdup ("-foffload-abi=lp64 -foffload-abi-host-opts=-mabi=lp64");
}
```