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-rw-r--r--gcc/testsuite/ChangeLog5
-rw-r--r--gcc/testsuite/gcc.dg/torture/pr78731.c41
2 files changed, 46 insertions, 0 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 43cf490..1d1b034 100644
--- 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
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;
+}