[Bug middle-end/63556] New: gcc should dedup string postfixes

[andi-gcc at firstfloor dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63556

            Bug ID: 63556
           Summary: gcc should dedup string postfixes
           Product: gcc
           Version: 4.9.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: andi-gcc at firstfloor dot org

With this code:

extern void func(char *a, char *b);

void f(void)
{
        func("abc", "xabc");
        func("abc", "abc");
}

we get:

.LC0:
        .string "xabc"
.LC1:
        .string "abc"

So the "abc"s get deduped. But it could also dedup the postfix by pointing
"abc" to "xabc" + 1. This would save some space.