[Bug optimization/12086] New: memcmp(i,j,4) should use word (SI) subtraction

[pinskia at gcc dot gnu dot org]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12086

           Summary: memcmp(i,j,4) should use word (SI) subtraction
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Keywords: pessimizes-code
          Severity: enhancement
          Priority: P2
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org

It would be nice if memcmp is inlined for small n's
It would be nice if these two functions are the same:
int g(int *j,int *l)  {  return memcmp(j,l,4);  }
int h(int *j, int *l) {  return *j - *l;                   }
This save space (not in this function on PPC because of sibcall but it could because gcc 
does not have to spill to much more to go over the function call) and time (because no 
function overhead on targets where memcmp is not inlined like PPC).