From 1e8390d8d6219a2f0a9b8c5592ee0c33c256d03d Mon Sep 17 00:00:00 2001
From: Neil Booth <neil@daikokuya.co.uk>
Date: Fri, 12 Oct 2007 15:31:31 +0000
Subject: [PATCH] Don't attempt to mask no bits

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42909 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/APInt.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 2e537d66da7..c5abf4bf163 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -2212,7 +2212,8 @@ APInt::tcExtract(integerPart *dst, unsigned int dstCount, const integerPart *src
     dst[dstParts - 1] |= ((src[firstSrcPart + dstParts] & mask)
                           << n % integerPartWidth);
   } else if (n > srcBits) {
-    dst[dstParts - 1] &= lowBitMask (srcBits % integerPartWidth);
+    if (srcBits % integerPartWidth)
+      dst[dstParts - 1] &= lowBitMask (srcBits % integerPartWidth);
   }
 
   /* Clear high parts.  */