From bb92f6fbf2c36b3530f33eb2e8d1842764ec9fdd Mon Sep 17 00:00:00 2001
From: Brian Gaeke <gaeke@uiuc.edu>
Date: Wed, 25 Feb 2004 01:53:45 +0000
Subject: Cygwin defines log2 as a macro. Undef it here IFF it has already been
 defined, so that we always get the inline function instead. Remember, kids,
 like it says in the GCC manual, "An Inline Function is As Fast As a Macro."

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11815 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Support/MathExtras.h | 4 ++++
 1 file changed, 4 insertions(+)

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

diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h
index 125aff3b9f..1540de3fca 100644
--- a/include/llvm/Support/MathExtras.h
+++ b/include/llvm/Support/MathExtras.h
@@ -18,6 +18,10 @@
 
 namespace llvm {
 
+#if defined(log2)
+# undef log2
+#endif
+
 inline unsigned log2(uint64_t C) {
   unsigned getPow;
   for (getPow = 0; C > 1; ++getPow)
-- 
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