gcc/testsuite/gcc.dg/tree-ssa/ldist-19.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -fno-ipa-icf -fdump-tree-ldist-details" } */
   3
   4 struct Foo
   5 {
   6   char a;
   7 };
   8
   9 struct Foo x[256];
  10
  11 static void __attribute__((noinline,noclone))
  12 foo()
  13 {
  14   int i;
  15   for (i = 0; i < 256; ++i)
  16     x[i] = (struct Foo){};
  17 }
  18
  19 static void __attribute__((noinline,noclone))
  20 bar()
  21 {
  22   int i;
  23   for (i = 0; i < 256; ++i)
  24     x[i].a = 1;
  25 }
  26
  27 static void __attribute__((noinline,noclone))
  28 foobar(unsigned char c)
  29 {
  30   int i;
  31   for (i = 0; i < 256; ++i)
  32     x[i].a = c;
  33 }
  34
  35 static void __attribute__((noinline,noclone))
  36 foobar2(char c)
  37 {
  38   int i;
  39   for (i = 0; i < 256; ++i)
  40     x[i].a = c;
  41 }
  42
  43 struct Baz
  44 {
  45   short a;
  46 };
  47
  48 struct Baz y[256];
  49
  50 static void __attribute__((noinline,noclone))
  51 baz()
  52 {
  53   int i;
  54   for (i = 0; i < 256; ++i)
  55     y[i].a = -1;
  56 }
  57
  58 int main()
  59 {
  60   volatile int x;
  61   foo();
  62   bar();
  63   foobar(x);
  64   foobar2(x);
  65   baz();
  66   return 0;
  67 }
  68
  69 /* { dg-final { scan-tree-dump-times "generated memset zero" 1 "ldist" } } */
  70 /* { dg-final { scan-tree-dump-times "generated memset" 5 "ldist" } } */