gcc/testsuite/gcc.dg/tree-ssa/flatten-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options -O2 } */
   3
   4 /* Check that we finish compiling even if instructed to
   5    flatten a cyclic callgraph.  Verify we correctly
   6    flatten with another function marked flatten in the
   7    callgraph.  */
   8
   9 void __attribute__((flatten)) direct(void)
  10 {
  11   direct();
  12 }
  13
  14
  15 void __attribute__((flatten)) indirect(void);
  16 static void indirect1(void)
  17 {
  18   indirect();
  19 }
  20 void __attribute__((flatten)) indirect(void)
  21 {
  22   indirect1();
  23 }
  24
  25
  26 void __attribute__((flatten)) doubleindirect(void);
  27 static void doubleindirect2(void)
  28 {
  29   doubleindirect();
  30 }
  31 static void doubleindirect1(void)
  32 {
  33   doubleindirect2();
  34 }
  35 void __attribute__((flatten)) doubleindirect(void)
  36 {
  37   doubleindirect1();
  38 }
  39
  40
  41 static void subcycle1(void);
  42 static void subcycle2(void)
  43 {
  44   subcycle1();
  45 }
  46 static void subcycle1(void)
  47 {
  48   subcycle2();
  49 }
  50 void __attribute__((flatten)) subcycle(void)
  51 {
  52   subcycle1();
  53 }
  54
  55
  56 static void doublesubcycle1(void);
  57 static void doublesubcycle2(void);
  58 static void doublesubcycle3(void)
  59 {
  60   doublesubcycle1();
  61 }
  62 static void doublesubcycle2(void)
  63 {
  64   doublesubcycle3();
  65 }
  66 static void doublesubcycle1(void)
  67 {
  68   doublesubcycle2();
  69 }
  70 void __attribute__((flatten)) doublesubcycle(void)
  71 {
  72   doublesubcycle1();
  73 }
  74
  75 /* { dg-final { scan-assembler "cycle.:" } } */
  76 /* { dg-final { scan-assembler-not "indirect.:" } } */