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-rw-r--r--gcc-4.9/gcc/testsuite/gcc.c-torture/execute/20111227-2.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.c-torture/execute/20111227-2.c b/gcc-4.9/gcc/testsuite/gcc.c-torture/execute/20111227-2.c
new file mode 100644
index 000000000..692c947e9
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.c-torture/execute/20111227-2.c
@@ -0,0 +1,44 @@
+/* Testcase derived from 20111227-1.c to ensure that REE is combining
+ redundant zero extends with zero extend to wider mode. */
+/* { dg-options "-fdump-rtl-ree -O" } */
+extern void abort (void);
+
+unsigned short s;
+unsigned int i;
+unsigned long l;
+unsigned char v = -1;
+
+void __attribute__((noinline,noclone))
+bar (int t)
+{
+ if (t == 2 && s != 0xff)
+ abort ();
+ if (t == 1 && i != 0xff)
+ abort ();
+ if (t == 0 && l != 0xff)
+ abort ();
+}
+
+void __attribute__((noinline,noclone))
+foo (unsigned char *a, int t)
+{
+ unsigned char r = v;
+
+ if (t == 2)
+ s = (unsigned short) r;
+ else if (t == 1)
+ i = (unsigned int) r;
+ else if (t == 0)
+ l = (unsigned long) r;
+ bar (t);
+}
+
+int main(void)
+{
+ foo (&v, 0);
+ foo (&v, 1);
+ foo (&v, 2);
+ return 0;
+}
+/* { dg-final { scan-rtl-dump "Elimination opportunities = 3 realized = 3" "ree" } } */
+/* { dg-final { cleanup-rtl-dump "ree" } } */