[2/2] Add test cases for noreorder

From: Andi Kleen <ak@linux.intel.com>

Add some simple test cases for noreorder behaving like
-fno-toplevel-reorder and -fno-toplevel-reorder still working.
Unfortunately there's no easy way to check for output order in DG,
so we just check for existence.

gcc/testsuite/:

2014-09-15  Andi Kleen  <ak@linux.intel.com>

	* gcc.dg/noreorder.c: New test.
	* gcc.dg/noreorder2.c: New test.
	* gcc.dg/noreorder3.c: New test.
	* gcc.dg/noreorder4.c: New test.
---
 gcc/testsuite/gcc.dg/noreorder.c  | 38 ++++++++++++++++++++++++++++++++++++++
 gcc/testsuite/gcc.dg/noreorder2.c | 11 +++++++++++
 gcc/testsuite/gcc.dg/noreorder3.c | 10 ++++++++++
 gcc/testsuite/gcc.dg/noreorder4.c |  5 +++++
 4 files changed, 64 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/noreorder.c
 create mode 100644 gcc/testsuite/gcc.dg/noreorder2.c
 create mode 100644 gcc/testsuite/gcc.dg/noreorder3.c
 create mode 100644 gcc/testsuite/gcc.dg/noreorder4.c

> From: Andi Kleen <ak@linux.intel.com>
> 
> Add some simple test cases for noreorder behaving like
> -fno-toplevel-reorder and -fno-toplevel-reorder still working.
> Unfortunately there's no easy way to check for output order in DG,
> so we just check for existence.

OK, thanks!
Honza
> 
> gcc/testsuite/:
> 
> 2014-09-15  Andi Kleen  <ak@linux.intel.com>
> 
> 	* gcc.dg/noreorder.c: New test.
> 	* gcc.dg/noreorder2.c: New test.
> 	* gcc.dg/noreorder3.c: New test.
> 	* gcc.dg/noreorder4.c: New test.
> ---
>  gcc/testsuite/gcc.dg/noreorder.c  | 38 ++++++++++++++++++++++++++++++++++++++
>  gcc/testsuite/gcc.dg/noreorder2.c | 11 +++++++++++
>  gcc/testsuite/gcc.dg/noreorder3.c | 10 ++++++++++
>  gcc/testsuite/gcc.dg/noreorder4.c |  5 +++++
>  4 files changed, 64 insertions(+)
>  create mode 100644 gcc/testsuite/gcc.dg/noreorder.c
>  create mode 100644 gcc/testsuite/gcc.dg/noreorder2.c
>  create mode 100644 gcc/testsuite/gcc.dg/noreorder3.c
>  create mode 100644 gcc/testsuite/gcc.dg/noreorder4.c
> 
> diff --git a/gcc/testsuite/gcc.dg/noreorder.c b/gcc/testsuite/gcc.dg/noreorder.c
> new file mode 100644
> index 0000000..7d40a29
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/noreorder.c
> @@ -0,0 +1,38 @@
> +/* { dg-do compile } */
> +/* { dg-options "-O2" } */
> +
> +/* The function order in this file is opposite from what the cgraph
> +   topological sort would output. So we can check the order is preserved. */
> +
> +extern void f2(int);
> +static int func2(void);
> +
> +#ifndef NOREORDER
> +#define NOREORDER __attribute__((no_reorder))
> +#endif
> +
> +asm("firstasm");
> +
> +NOREORDER __attribute__((noinline)) int bozo(void)
> +{
> +  f2(3);
> +  func2();
> +}
> +
> +asm("jukjuk");
> +
> +NOREORDER __attribute__((noinline)) static int func1(void)
> +{
> +  f2(1);
> +}
> +
> +asm("barbar");
> +
> +NOREORDER __attribute__((noinline)) static int func2(void)
> +{
> +  func1();
> +}
> +
> +asm("lastasm");
> +
> +/* { dg-final { scan-assembler "firstasm.*bozo.*jukjuk.*func1.*barbar.*func2.*lastasm" } } */
> diff --git a/gcc/testsuite/gcc.dg/noreorder2.c b/gcc/testsuite/gcc.dg/noreorder2.c
> new file mode 100644
> index 0000000..558361b
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/noreorder2.c
> @@ -0,0 +1,11 @@
> +/* { dg-do compile } */
> +/* { dg-options "-O2 -fno-toplevel-reorder" } */
> +
> +__attribute__((no_reorder)) int foobar;
> +
> +static int barbar;
> +int bozo;
> +
> +/* { dg-final { scan-assembler "foobar" } } */
> +/* { dg-final { scan-assembler "bozo" } } */
> +/* { dg-final { scan-assembler "barbar" } } */
> diff --git a/gcc/testsuite/gcc.dg/noreorder3.c b/gcc/testsuite/gcc.dg/noreorder3.c
> new file mode 100644
> index 0000000..a0b637f
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/noreorder3.c
> @@ -0,0 +1,10 @@
> +/* { dg-do compile } */
> +/* { dg-options "-O2" } */
> +
> +__attribute__((no_reorder)) int foobar;
> +static int barbar;
> +int bozo;
> +
> +/* { dg-final { scan-assembler "foobar" } } */
> +/* { dg-final { scan-assembler "bozo" } } */
> +/* { dg-final { scan-assembler-not "barbar" } } */
> diff --git a/gcc/testsuite/gcc.dg/noreorder4.c b/gcc/testsuite/gcc.dg/noreorder4.c
> new file mode 100644
> index 0000000..632fc33
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/noreorder4.c
> @@ -0,0 +1,5 @@
> +/* { dg-do compile } */
> +/* { dg-options "-O2 -fno-toplevel-reorder" } */
> +#define NOREORDER
> +#include "noreorder.c"
> +/* { dg-final { scan-assembler "bozo.*jukjuk.*func1.*barbar.*func2" } } */
> -- 
> 2.1.0