#3053 [ds390] FATAL Compiler Internal Error on code using variable argument pointers

[Gabriel Ravier]

#include <stdarg.h>

int g(va_list ap);

void f(const char* s, ...)
{
    va_list *a[1], **b = a;
    g(**b);
    ++b;
    g(**b);
}

Compiling with sdcc test.c -mds390. This results in test.c:10: error 9: FATAL Compiler Internal Error in file 'gen.c' line number '1152' : AOP_STR with DPTR in use!. Tested with commit 11672.

[Christopher Bazley]

Exact DS390 sample now compiles without AOP_STR internal error and warns 346 about the invalid dereference. Original failure was in the DS390 backend.
https://godbolt.org/z/KMr5fKner

[Christopher Bazley]

Regression test added as [r17055]