Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 34 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/debug/debug-1.c b/gcc-4.9/gcc/testsuite/gcc.dg/debug/debug-1.c
new file mode 100644
index 000000000..35b5c91b1
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/debug/debug-1.c
@@ -0,0 +1,34 @@
+/* Verify that the scheduler does not discard the lexical block.  */
+/* { dg-do compile } */
+/* { dg-options "-dA" } */
+/* On MIPS targets that support conditional moves, the optimal
+   implementation of this function is:
+
+	l[wd] tmp,p
+	li $2,2
+	jr $31
+	movz $2,$0,tmp
+
+   After if-conversion, we have a conditional move into a pseudo P
+   followed a copy of P into the return register ($2).  P is associated
+   with xyzzy, so if-conversion is behaving as expected, and has not lost
+   the variable association.  The destination of the second instruction
+   is associated with the function return value.  Combine then combines
+   these two instructions, removing the last use of P and xyzzy.
+
+   Everything is behaving as expected in this scenario, so we avoid
+   using conditional moves for this test.  */
+/* { dg-options "-dA -fno-if-conversion" { target mips*-*-* } } */
+/* { dg-final { scan-assembler "xyzzy" } } */
+
+long p;
+
+long foo(void)
+{
+  {
+    long xyzzy = 0;
+    if (p)
+      xyzzy = 2;
+    return xyzzy;
+  }
+}