From: Craig Topper <craig.topper@gmail.com>
Date: Mon, 27 Mar 2017 18:16:17 +0000 (+0000)
Subject: [APInt] Move operator&=(uint64_t) inline and use memset to clear the upper words.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0532ee926c28ac0abda1d4181123974ec6bd1507;p=llvm

[APInt] Move operator&=(uint64_t) inline and use memset to clear the upper words.

This method is pretty new and probably isn't use much in the code base so this should have a negligible size impact. The OR and XOR operators are already inline.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@298870 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h
index 220e408da15..a29cfe5fbca 100644
--- a/include/llvm/ADT/APInt.h
+++ b/include/llvm/ADT/APInt.h
@@ -691,7 +691,15 @@ public:
   /// Performs a bitwise AND operation on this APInt and RHS. RHS is
   /// logically zero-extended or truncated to match the bit-width of
   /// the LHS.
-  APInt &operator&=(uint64_t RHS);
+  APInt &operator&=(uint64_t RHS) {
+    if (isSingleWord()) {
+      VAL &= RHS;
+      return *this;
+    }
+    pVal[0] &= RHS;
+    memset(pVal+1, 0, (getNumWords() - 1) * APINT_WORD_SIZE);
+    return *this;
+  }
 
   /// \brief Bitwise OR assignment operator.
   ///
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index aacb7440313..ebcbb151867 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -428,18 +428,6 @@ APInt& APInt::operator&=(const APInt& RHS) {
   return *this;
 }
 
-APInt &APInt::operator&=(uint64_t RHS) {
-  if (isSingleWord()) {
-    VAL &= RHS;
-    return *this;
-  }
-  pVal[0] &= RHS;
-  unsigned numWords = getNumWords();
-  for (unsigned i = 1; i < numWords; ++i)
-    pVal[i] = 0;
-  return *this;
-}
-
 APInt& APInt::operator|=(const APInt& RHS) {
   assert(BitWidth == RHS.BitWidth && "Bit widths must be the same");
   if (isSingleWord()) {