From: Craig Topper <craig.topper@gmail.com>
Date: Thu, 20 Apr 2017 06:04:01 +0000 (+0000)
Subject: [APInt] Call the slow case counting methods directly in isMask/isShiftedMask. We... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=63d7ef8671f6c77a99c3dd9c792f01210df8078d;p=llvm

[APInt] Call the slow case counting methods directly in isMask/isShiftedMask. We already handled the single word case. NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300823 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h
index 5f87765a52d..2e8da455c0a 100644
--- a/include/llvm/ADT/APInt.h
+++ b/include/llvm/ADT/APInt.h
@@ -443,8 +443,9 @@ public:
     assert(numBits <= BitWidth && "numBits out of range");
     if (isSingleWord())
       return VAL == (UINT64_MAX >> (APINT_BITS_PER_WORD - numBits));
-    unsigned Ones = countTrailingOnes();
-    return (numBits == Ones) && ((Ones + countLeadingZeros()) == BitWidth);
+    unsigned Ones = countTrailingOnesSlowCase();
+    return (numBits == Ones) &&
+           ((Ones + countLeadingZerosSlowCase()) == BitWidth);
   }
 
   /// \returns true if this APInt is a non-empty sequence of ones starting at
@@ -453,8 +454,8 @@ public:
   bool isMask() const {
     if (isSingleWord())
       return isMask_64(VAL);
-    unsigned Ones = countTrailingOnes();
-    return (Ones > 0) && ((Ones + countLeadingZeros()) == BitWidth);
+    unsigned Ones = countTrailingOnesSlowCase();
+    return (Ones > 0) && ((Ones + countLeadingZerosSlowCase()) == BitWidth);
   }
 
   /// \brief Return true if this APInt value contains a sequence of ones with
@@ -462,8 +463,9 @@ public:
   bool isShiftedMask() const {
     if (isSingleWord())
       return isShiftedMask_64(VAL);
-    unsigned Ones = countPopulation();
-    return (Ones + countTrailingZeros() + countLeadingZeros()) == BitWidth;
+    unsigned Ones = countPopulationSlowCase();
+    unsigned LeadZ = countLeadingZerosSlowCase();
+    return (Ones + LeadZ + countTrailingZeros()) == BitWidth;
   }
 
   /// @}