[gcc(refs/users/marxin/heads/loop-unswitch-improvement)] Add new test.

[Martin Liska <marxin@gcc.gnu.org>]

https://gcc.gnu.org/g:fb3c2f6efdbba61aeaf162d421008ec5b40c9854

commit fb3c2f6efdbba61aeaf162d421008ec5b40c9854
Author: Martin Liska <mliska@suse.cz>
Date:   Fri Nov 19 14:51:49 2021 +0100

    Add new test.

Diff:
---
 gcc/testsuite/gcc.dg/loop-unswitch-8.c |  2 +-
 gcc/testsuite/gcc.dg/loop-unswitch-9.c | 27 +++++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/loop-unswitch-8.c b/gcc/testsuite/gcc.dg/loop-unswitch-8.c
index 37692966fc5..7738a24d849 100644
--- a/gcc/testsuite/gcc.dg/loop-unswitch-8.c
+++ b/gcc/testsuite/gcc.dg/loop-unswitch-8.c
@@ -28,4 +28,4 @@ foo(double *a, double *b, double *c, double *d, double *r, int size, int order)
   return 0;
 }
 
-/* { dg-final { scan-tree-dump-times ";; Unswitching loop with condition: order" 1 "unswitch" } } */
+/* { dg-final { scan-tree-dump-times ";; Unswitching loop with condition: order" 3 "unswitch" } } */
diff --git a/gcc/testsuite/gcc.dg/loop-unswitch-9.c b/gcc/testsuite/gcc.dg/loop-unswitch-9.c
new file mode 100644
index 00000000000..46c93605dc8
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/loop-unswitch-9.c
@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -funswitch-loops -fdump-tree-unswitch-details" } */
+
+int
+foo(double *a, double *b, double *c, double *d, double *r, int size, int order)
+{
+  for (int i = 0; i < size; i++)
+  {
+    double tmp;
+
+    if (order == 1)
+      tmp = -8 * a[i];
+    else
+      {
+	if (order == 2)
+	  tmp = -4 * b[i];
+	else
+	  tmp = a[i];
+      }
+
+    r[i] = 3.4f * tmp + d[i];
+  }
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times ";; Unswitching loop with condition: order" 2 "unswitch" } } */