From d997554fab3294d8fb2646702dca35f768d30591 Mon Sep 17 00:00:00 2001
From: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 12 Nov 2007 13:24:06 +0000
Subject: 2007-11-12  Richard Guenther  <rguenther@suse.de>

	PR middle-end/34027
	* fold-const.c (fold_binary): Fold n - (n / m) * m to n % m.
	(fold_binary): Fold unsinged FLOOR_DIV_EXPR to TRUNC_DIV_EXPR.

	* gcc.dg/pr34027-1.c: New testcase.
	* gcc.dg/pr34027-2.c: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@130097 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/testsuite/ChangeLog          |  6 ++++++
 gcc/testsuite/gcc.dg/pr34027-1.c | 12 ++++++++++++
 gcc/testsuite/gcc.dg/pr34027-2.c | 10 ++++++++++
 3 files changed, 28 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/pr34027-1.c
 create mode 100644 gcc/testsuite/gcc.dg/pr34027-2.c

(limited to 'gcc/testsuite')

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 476b82b63bf..e22485905ac 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2007-11-12  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/34027
+	* gcc.dg/pr34027-1.c: New testcase.
+	* gcc.dg/pr34027-2.c: Likewise.
+
 2007-11-12  Ira Rosen  <irar@il.ibm.com>
 
 	PR tree-optimization/33953
diff --git a/gcc/testsuite/gcc.dg/pr34027-1.c b/gcc/testsuite/gcc.dg/pr34027-1.c
new file mode 100644
index 00000000000..532e4976dc3
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr34027-1.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-Os -fdump-tree-optimized" } */
+
+unsigned long foobar(unsigned long ns)
+{
+  while(ns >= 10000L)
+    ns -= 10000L;
+  return ns;
+}
+
+/* { dg-final { scan-tree-dump "ns % 10000" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */
diff --git a/gcc/testsuite/gcc.dg/pr34027-2.c b/gcc/testsuite/gcc.dg/pr34027-2.c
new file mode 100644
index 00000000000..70c4561d0f1
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr34027-2.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-fdump-tree-gimple" } */
+
+long foo(long n, long m)
+{
+  return n - (n / m) * m;
+}
+
+/* { dg-final { scan-tree-dump "n % m" "gimple" } } */
+/* { dg-final { cleanup-tree-dump "gimple" } } */
-- 
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