gcc/testsuite/gcc.target/arm/thumb1-far-jump-2.c

   1 /* Check for thumb1 far jump. This is the extreme case that far jump
   2  * will be used with minimum number of instructions. By passing this case
   3  * it means the heuristic of saving lr for far jump meets the most extreme
   4  * requirement.  */
   5 /* { dg-options "-Os" } */
   6 /* { dg-skip-if "" { ! { arm_thumb1 } } } */
   7
   8 volatile register int r4 asm ("r4");
   9 void f3(int i)
  10 {
  11 #define GO(n) \
  12   extern volatile int g_##n; \
  13   r4=(int)&g_##n;
  14
  15 #define GO8(n) \
  16   GO(n##_0) \
  17   GO(n##_1) \
  18   GO(n##_2) \
  19   GO(n##_3) \
  20   GO(n##_4) \
  21   GO(n##_5) \
  22   GO(n##_6) \
  23   GO(n##_7)
  24
  25 #define GO64(n) \
  26   GO8(n##_0) \
  27   GO8(n##_1) \
  28   GO8(n##_2) \
  29   GO8(n##_3) \
  30   GO8(n##_4) \
  31   GO8(n##_5) \
  32   GO8(n##_6) \
  33   GO8(n##_7) \
  34
  35 #define GO498(n) \
  36   GO64(n##_0) \
  37   GO64(n##_1) \
  38   GO64(n##_2) \
  39   GO64(n##_3) \
  40   GO64(n##_4) \
  41   GO64(n##_5) \
  42   GO64(n##_6) \
  43   GO8(n##_0) \
  44   GO8(n##_1) \
  45   GO8(n##_2) \
  46   GO8(n##_3) \
  47   GO8(n##_4) \
  48   GO8(n##_5) \
  49   GO(n##_0) \
  50   GO(n##_1) \
  51
  52   if (i) {
  53     GO498(0);
  54   }
  55 }
  56
  57 /* { dg-final { scan-assembler "push.*lr" } } */