🚀 go-pugleaf

/*

GCC BUG: bad code with nested switches and double-length
   integers.

This is example code to exercise a gcc bug.

On a "sparc-sun-sunos4.1" with gcc version 2.2.2, the
following code core dumps. I used "gcc -ggdb file.c" to
compile.

 I can fix it by: (a) the "#define switch(a) switch((int)(a))"
below, or (b) "typedef int longint" instead of
"typedef long long longint". The nested switch also seems
important; I don't think it will core dump with just one
switch level.

It coredumps on the outermost "switch".

*/

#include <stdio.h>
/*
#define switch(a) switch((int)(a))
*/

typedef long long longint;
void main(void);
void wwrite(longint);

void main(void)
{
	wwrite((longint) 0);
}

void wwrite(longint i)
{
	longint j = 0;

	switch(i)
	{
	case 1:
	case 2:
	case 3:
	case 4:
	case 5:
	case 6:
	case 7:
	case 0xa:
	case 0x1c:
		j = 1;
	case 23:
		switch(j)
		{
		case 0:
			printf("hello\n");
			break;
		case 1:
			printf("bye\n");
			break;
		}
		break;
	case 47:
		printf("hi\n");
		break;
	default:
		printf("ho\n");
		break;
	}
}