testsuite: Fix for targets not passing argc/argv [PR116154]

PRU and other simulator targets do not pass any argv arguments
to main.  Instead of erroneously relying on argc==0, use a volatile
variable instead.

I reverted the fix for PR67947 in r6-3891-g8a18fcf4aa1d5c, and made sure
that the updated test case still fails for x86_64:

  $ make check-gcc-c RUNTESTFLAGS="dg-torture.exp=pr67947.c"
  ...
  FAIL: gcc.dg/torture/pr67947.c   -O1  execution test
  ...
  # of expected passes            8
  # of unexpected failures        8

Fix was suggested by Andrew Pinski in PR116154.  Committed as obvious.

	PR testsuite/116154

gcc/testsuite/ChangeLog:

	* gcc.dg/torture/pr67947.c: Use volatile variable instead of
	argc.

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>

diff --git a/gcc/testsuite/gcc.dg/torture/pr67947.c b/gcc/testsuite/gcc.dg/torture/pr67947.c
index 368a8b20cbf0d8c9e5369b38400f2218e8e67bbf..1016f2579cb22fa98d1992e313b99ebf2a0460be 100644 (file)
--- a/gcc/testsuite/gcc.dg/torture/pr67947.c
+++ b/gcc/testsuite/gcc.dg/torture/pr67947.c
@@ -11,11 +11,13 @@ __attribute__((noinline, noclone)) void foo (int x)
     c++;
 }
 
+volatile int t = 1;
+
 int
 main (int argc, char* argv[])
 {
   int j, k, b = 0;
-  if (argc == 0)
+  if (t == 0)
     b = 1;
   for (j = 0; j < 3; j++)
     for (k = 0; k < 1; k++)