From: Chris Lattner <sabre@nondot.org>
Date: Wed, 16 Feb 2011 19:16:34 +0000 (+0000)
Subject: Add a few missed xforms from GCC PR14753
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5653f1f9046c6c954e6f74869ca927611c050938;p=oota-llvm.git

Add a few missed xforms from GCC PR14753


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125681 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index 5aa29782afd..c6f384cd6ea 100644
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -2218,3 +2218,32 @@ llc time when it gets inlined, because we can use smaller transfers.  This also
 avoids partial register stalls in some important cases.
 
 //===---------------------------------------------------------------------===//
+
+Some missed instcombine xforms (from GCC PR14753):
+
+void bar (void);
+
+void mask_gt (unsigned int a) {
+/* This is equivalent to a > 15.  */
+if ((a & ~7) > 8)
+bar();
+}
+
+void neg_eq_cst(unsigned int a) {
+if (-a == 123)
+bar();
+}
+
+void minus_cst(unsigned int a) {
+if (20 - a == 5)
+bar();
+}
+
+void rotate_cst (unsigned a) {
+a = (a << 10) | (a >> 22);
+if (a == 123)
+bar ();
+}
+
+//===---------------------------------------------------------------------===//
+