Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 33 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/hoist-register-pressure-3.c b/gcc-4.9/gcc/testsuite/gcc.dg/hoist-register-pressure-3.c
new file mode 100644
index 000000000..b050f8982
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/hoist-register-pressure-3.c
@@ -0,0 +1,33 @@
+/* { dg-options "-Os -fdump-rtl-hoist" }  */
+/* { dg-final { scan-rtl-dump "PRE/HOIST: end of bb .* copying expression" "hoist" } } */
+/* { dg-final { cleanup-rtl-dump "hoist" } } */
+
+#define BUF 100
+int a[BUF];
+
+void com (int);
+void bar (int);
+
+int foo (int x, int y, int z)
+{
+  /* "x+y" won't be hoisted if "-fira-hoist-pressure" is disabled,
+     because its rtx_cost is too small.  */
+  if (z)
+    {
+      a[1] = a[0] + a[2] + a[3] + a[4] + a[5] + a[6];
+      a[2] = a[1] + a[3] + a[5] + a[5] + a[6] + a[7];
+      a[3] = a[2] + a[5] + a[7] + a[6] + a[7] + a[8];
+      a[4] = a[3] + a[7] + a[11] + a[7] + a[8] + a[9];
+      a[5] = a[5] + a[11] + a[13] + a[8] + a[9] + a[10];
+      a[6] = a[7] + a[13] + a[17] + a[9] + a[10] + a[11];
+      a[7] = a[11] + a[17] + a[19] + a[10] + a[11] + a[12];
+      com (x+y);
+    }
+  else
+    {
+      bar (x+y);
+    }
+
+  return 0;
+}
+