re PR tree-optimization/78731 (Possible bug with switch when optimization is turned...

2016-12-14  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/78731
	* gcc.dg/torture/pr78731.c: New testcase.

From-SVN: r243644

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 43cf4900f5af3ac197f56d7f2a3dcf375fabb294..1d1b03460564233fd3587598e9f97fd6e4df4552 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2016-12-14  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/78731
+       * gcc.dg/torture/pr78731.c: New testcase.
+
 2016-12-14  Martin Liska  <mliska@suse.cz>
 
        * gcc.dg/tree-ssa/20040703-1.c: Update scanned pattern.

diff --git a/gcc/testsuite/gcc.dg/torture/pr78731.c b/gcc/testsuite/gcc.dg/torture/pr78731.c
new file mode 100644 (file)
index 0000000..5a4d43b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr78731.c
@@ -0,0 +1,41 @@
+/* { dg-do run } */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define GENERAL 1
+#define BRACKETS 2
+#define QUOTES 3
+
+void __attribute__((noinline,noclone))
+foo(char *qb, char* into)
+{
+  int state = QUOTES;
+  int save_state = BRACKETS;
+
+  while (qb)
+    {
+      switch (state)
+       {
+       case BRACKETS:
+         exit(0);
+       case GENERAL:
+         abort ();
+       case QUOTES:
+         state = save_state;
+         save_state = GENERAL;
+         break;
+       default: ;
+       }
+      printf("State %d btw GENERAL %d\n", state, GENERAL);
+    }
+  abort ();
+}
+
+int main()
+{
+  char *b = "123";
+  char out[4];
+  foo(b, out);
+  return 0;
+}