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#989 Shared compound literals
C allows sharing memory for compund literals in some cases (section 6.5.3.6): "String literals, and compound literals with const-qualified types, including those specified with constexpr, are not required to designate distinct objects." (quote from the C23 standard, but C99 had similar wording, except for constexpr, which is a C23 feature).
This allows to save memory. SDCC currently implements this for strings literals, but not compound literals:
struct a
{
int i;
int j;
};
void f(const char *, struct a);
void g(void)
{
f("test", (static const struct a){1, 2});
f("test", (static const struct a){1, 2});
}
When compiling this via sdcc -mstm8 --std-c23 test.c, the resulting assembler code contains the string only once, but the compound literal twice.
