From 6678e7b6eb534b43b92105076e6d0553e5cf7def Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Wed, 17 Nov 2010 02:44:44 +0000
Subject: Memoize results from ScalarEvolution's getUnsignedRange and
 getSignedRange. This fixes some extreme compile times on unrolled sha512
 code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119455 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Support/ConstantRange.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'include/llvm/Support/ConstantRange.h')

diff --git a/include/llvm/Support/ConstantRange.h b/include/llvm/Support/ConstantRange.h
index 792b4107b1..c84e64ada9 100644
--- a/include/llvm/Support/ConstantRange.h
+++ b/include/llvm/Support/ConstantRange.h
@@ -47,6 +47,9 @@ public:
   ///
   explicit ConstantRange(uint32_t BitWidth, bool isFullSet = true);
 
+  /// Default constructor that creates an uninitialized ConstantRange.
+  ConstantRange() {}
+
   /// Initialize a range to hold the single specified value.
   ///
   ConstantRange(const APInt &Value);
-- 
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