| /* Check local register variables using a register conventionally |
| used as the frame pointer aren't clobbered under high register pressure. */ |
| /* { dg-do run } */ |
| /* { dg-skip-if "incompatible options" { ! { arm_thumb1_ok || arm_thumb2_ok } } } */ |
| /* { dg-options "-Os -mthumb -fomit-frame-pointer" } */ |
| |
| #include <stdlib.h> |
| |
| int global=5; |
| |
| void __attribute__((noinline)) foo(int p1, int p2, int p3, int p4) |
| { |
| if (global != 5 || p1 != 1 || p2 != 2 || p3 != 3 || p4 != 4) |
| abort(); |
| } |
| |
| int __attribute__((noinline)) test(int a, int b, int c, int d) |
| { |
| register unsigned long r __asm__("r7") = 0xdeadbeef; |
| int e; |
| |
| /* ABCD are live after the call which should be enough |
| to cause r7 to be used if it weren't for the register variable. */ |
| foo(a,b,c,d); |
| |
| e = 0; |
| __asm__ __volatile__ ("mov %0, %2" |
| : "=r" (e) |
| : "0" (e), "r" (r)); |
| |
| global = a+b+c+d; |
| |
| return e; |
| } |
| |
| int main() |
| { |
| if (test(1, 2, 3, 4) != 0xdeadbeef) |
| abort(); |
| if (global != 10) |
| abort(); |
| return 0; |
| } |