1 files changed, 42 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pr120182.c b/gcc/testsuite/gcc.dg/torture/pr120182.c
new file mode 100644
index 0000000..5e2d171
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr120182.c
@@ -0,0 +1,42 @@
+/* { dg-do run { target { { *-*-linux* *-*-gnu* *-*-uclinux* } && mmap } } } */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+
+struct S
+{
+  struct S *next;
+};
+
+static void __attribute__((noipa))
+allocate(void *addr, unsigned long long size)
+{
+  void *ptr = mmap((void *)addr, size,
+		   PROT_READ | PROT_WRITE,
+		   MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE,
+		   -1, 0);
+  if(ptr != addr)
+    exit(0);
+}
+
+int main (void)
+{
+  int size = 0x8000;
+  char *ptr = (char *)0x288000ull;
+  allocate((void *)ptr, size);
+
+  struct S *s1 = (struct S *)ptr;
+  struct S *s2 = (struct S *)256;
+  for (int i = 0; i < 3; i++)
+    {
+      for(char *addr = (char *)s1; addr < (char *)s1 + sizeof(*s1); ++addr)
+	*addr = 0;
+
+      if(s1->next)
+	s1->next = s1->next->next = s2;
+      else
+	s1->next = s2;
+    }
+  return 0;
+}