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authorBen Cheng <bccheng@google.com>2014-03-25 22:37:19 -0700
committerBen Cheng <bccheng@google.com>2014-03-25 22:37:19 -0700
commit1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch)
treec607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/gcc/testsuite/gcc.target/i386/pr46084.c
parent283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff)
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Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.target/i386/pr46084.c')
-rw-r--r--gcc-4.9/gcc/testsuite/gcc.target/i386/pr46084.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.target/i386/pr46084.c b/gcc-4.9/gcc/testsuite/gcc.target/i386/pr46084.c
new file mode 100644
index 000000000..30bac08cc
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.target/i386/pr46084.c
@@ -0,0 +1,69 @@
+/* This test needs to use setrlimit to set the stack size, so it can
+ only run on Unix. */
+/* { dg-do run { target *-*-linux* *-*-gnu* *-*-solaris* *-*-darwin* } } */
+/* { dg-require-effective-target avx_runtime } */
+/* { dg-require-effective-target split_stack } */
+/* { dg-options "-fsplit-stack -O2 -mavx" } */
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/resource.h>
+
+/* Use a noinline function to ensure that the buffer is not removed
+ from the stack. */
+static void use_buffer (char *buf, size_t) __attribute__ ((noinline));
+static void
+use_buffer (char *buf, size_t c)
+{
+ size_t i;
+
+ for (i = 0; i < c; ++i)
+ buf[i] = (char) i;
+}
+
+/* Each recursive call uses 10 * i bytes. We call it 1000 times,
+ using a total of 5,000,000 bytes. If -fsplit-stack is not working,
+ that will overflow our stack limit. */
+
+static void
+down1 (int i)
+{
+ char buf[10 * i];
+
+ if (i > 0)
+ {
+ use_buffer (buf, 10 * i);
+ down1 (i - 1);
+ }
+}
+
+/* Same thing, using alloca. */
+
+static void
+down2 (int i)
+{
+ char *buf = alloca (10 * i);
+
+ if (i > 0)
+ {
+ use_buffer (buf, 10 * i);
+ down2 (i - 1);
+ }
+}
+
+int
+main (void)
+{
+ struct rlimit r;
+
+ /* We set a stack limit because we are usually invoked via make, and
+ make sets the stack limit to be as large as possible. */
+ r.rlim_cur = 8192 * 1024;
+ r.rlim_max = 8192 * 1024;
+ if (setrlimit (RLIMIT_STACK, &r) != 0)
+ abort ();
+ down1 (1000);
+ down2 (1000);
+ return 0;
+}