From f7a60d28a1160e314d577847b3e7349235293b7c Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 11 Oct 2009 07:51:25 +0000
Subject: [PATCH] add a helper for matching "1".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83760 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Support/PatternMatch.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/llvm/Support/PatternMatch.h b/include/llvm/Support/PatternMatch.h
index eb393ac4c3e..c0b6a6b98c0 100644
--- a/include/llvm/Support/PatternMatch.h
+++ b/include/llvm/Support/PatternMatch.h
@@ -87,6 +87,18 @@ struct zero_ty {
 /// m_Zero() - Match an arbitrary zero/null constant.
 inline zero_ty m_Zero() { return zero_ty(); }
 
+struct one_ty {
+  template<typename ITy>
+  bool match(ITy *V) {
+    if (const ConstantInt *C = dyn_cast<ConstantInt>(V))
+      return C->isOne();
+    return false;
+  }
+};
+
+/// m_One() - Match a an integer 1.
+inline one_ty m_One() { return one_ty(); }
+  
 
 template<typename Class>
 struct bind_ty {