From cadf450e175fa6b65e28dcbb1f41d9c1bcf6b85a Mon Sep 17 00:00:00 2001
From: Michael Gottesman <mgottesman@apple.com>
Date: Fri, 13 Dec 2013 22:00:19 +0000
Subject: Remove APInt::extractBit since it is already implemented via
 operator[]. Change tests for extractBit to test operator[].

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197277 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/ADT/APInt.h    | 5 +----
 lib/Support/APInt.cpp       | 8 --------
 unittests/ADT/APIntTest.cpp | 6 +++---
 3 files changed, 4 insertions(+), 15 deletions(-)

diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h
index 2bb5c3e2a1..8bfdcbfa36 100644
--- a/include/llvm/ADT/APInt.h
+++ b/include/llvm/ADT/APInt.h
@@ -1244,9 +1244,6 @@ public:
   /// as "bitPosition".
   void flipBit(unsigned bitPosition);
 
-  /// \brief Returns true if the bit in bitPosition is set.
-  bool extractBit(unsigned bitPosition) const;
-
   /// @}
   /// \name Value Characterization Functions
   /// @{
@@ -1517,7 +1514,7 @@ public:
     // UINT32_MAX. Finally extractBit of MSB - 1 will be UINT32_MAX implying
     // that we get BitWidth - 1.
     unsigned lg = logBase2();
-    return lg + unsigned(extractBit(std::min(lg - 1, BitWidth - 1)));
+    return lg + unsigned((*this)[std::min(lg - 1, BitWidth - 1)]);
   }
 
   /// \returns the log base 2 of this APInt if its an exact power of two, -1
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 731c8cc9ca..89f96bd577 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -607,14 +607,6 @@ void APInt::flipBit(unsigned bitPosition) {
   else setBit(bitPosition);
 }
 
-bool APInt::extractBit(unsigned bitPosition) const {
-  assert(bitPosition < BitWidth && "Out of the bit-width range!");
-  if (isSingleWord())
-    return VAL & maskBit(bitPosition);
-  else
-    return pVal[whichWord(bitPosition)] & maskBit(bitPosition);
-}
-
 unsigned APInt::getBitsNeeded(StringRef str, uint8_t radix) {
   assert(!str.empty() && "Invalid string length");
   assert((radix == 10 || radix == 8 || radix == 16 || radix == 2 || 
diff --git a/unittests/ADT/APIntTest.cpp b/unittests/ADT/APIntTest.cpp
index 36cbd868a2..5043aa0eec 100644
--- a/unittests/ADT/APIntTest.cpp
+++ b/unittests/ADT/APIntTest.cpp
@@ -598,13 +598,13 @@ TEST(APIntTest, tcDecrement) {
   }
 }
 
-TEST(APIntTest, extractBit) {
+TEST(APIntTest, arrayAccess) {
   // Single word check.
   uint64_t E1 = 0x2CA7F46BF6569915ULL;
   APInt A1(64, E1);
   for (unsigned i = 0, e = 64; i < e; ++i) {    
     EXPECT_EQ(bool(E1 & (1ULL << i)),
-              A1.extractBit(i));
+              A1[i]);
   }
 
   // Multiword check.
@@ -618,7 +618,7 @@ TEST(APIntTest, extractBit) {
   for (unsigned i = 0; i < 4; ++i) {
     for (unsigned j = 0; j < integerPartWidth; ++j) {
       EXPECT_EQ(bool(E2[i] & (1ULL << j)),
-                A2.extractBit(i*integerPartWidth + j));
+                A2[i*integerPartWidth + j]);
     }
   }
 }
-- 
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