diff --git a/lib/Analysis/ConstantFolding.cpp b/lib/Analysis/ConstantFolding.cpp
index 359766d444f..1b355b6478b 100644
--- a/lib/Analysis/ConstantFolding.cpp
+++ b/lib/Analysis/ConstantFolding.cpp
@@ -20,7 +20,6 @@
 #include "llvm/Support/GetElementPtrTypeIterator.h"
 #include "llvm/Support/MathExtras.h"
 #include <cerrno>
-#include <cmath>
 using namespace llvm;
 
 //===----------------------------------------------------------------------===//
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index a4de55c2c3e..cd7000503ca 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -75,7 +75,6 @@
 #include "llvm/Support/InstIterator.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/ADT/Statistic.h"
-#include <cmath>
 #include <iostream>
 #include <algorithm>
 using namespace llvm;
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index e1cd741d7a8..472a8d71361 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -33,7 +33,6 @@
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/STLExtras.h"
 #include <algorithm>
-#include <cmath>
 #include <iostream>
 using namespace llvm;
 
diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index 2aea512b16d..9a358faea01 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -29,7 +29,6 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Compiler.h"
 #include <algorithm>
-#include <cmath>
 #include <iostream>
 #include <set>
 #include <queue>
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index a1f3f7bcd49..bdb2d5e2f17 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -38,7 +38,6 @@
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/CommandLine.h"
 #include <algorithm>
-#include <cmath>
 #include <iostream>
 #include <algorithm>
 using namespace llvm;
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index ef9e3f5a1b0..f2e9ea8c83c 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -28,7 +28,6 @@
 #include "llvm/ADT/StringExtras.h"
 #include <iostream>
 #include <set>
-#include <cmath>
 #include <algorithm>
 using namespace llvm;
 
diff --git a/lib/ExecutionEngine/Interpreter/Execution.cpp b/lib/ExecutionEngine/Interpreter/Execution.cpp
index da1fe54dfa3..928a819cd00 100644
--- a/lib/ExecutionEngine/Interpreter/Execution.cpp
+++ b/lib/ExecutionEngine/Interpreter/Execution.cpp
@@ -20,7 +20,6 @@
 #include "llvm/Support/GetElementPtrTypeIterator.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Support/Debug.h"
-#include <cmath>  // For fmod
 using namespace llvm;
 
 namespace {
diff --git a/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp b/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
index 67fa983d9ef..28bb9bfeda2 100644
--- a/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
+++ b/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
@@ -24,7 +24,6 @@
 #include "llvm/Module.h"
 #include "llvm/System/DynamicLibrary.h"
 #include "llvm/Target/TargetData.h"
-#include <cmath>
 #include <csignal>
 #include <map>
 using std::vector;
diff --git a/lib/Support/FileUtilities.cpp b/lib/Support/FileUtilities.cpp
index 2160c77d8a0..ea7822a2c4b 100644
--- a/lib/Support/FileUtilities.cpp
+++ b/lib/Support/FileUtilities.cpp
@@ -16,7 +16,6 @@
 #include "llvm/System/Path.h"
 #include "llvm/System/MappedFile.h"
 #include "llvm/ADT/StringExtras.h"
-#include <cmath>
 #include <cstring>
 #include <cctype>
 using namespace llvm;
diff --git a/lib/Transforms/Utils/Local.cpp b/lib/Transforms/Utils/Local.cpp
index 1e032a3bd0b..9a16bfccb37 100644
--- a/lib/Transforms/Utils/Local.cpp
+++ b/lib/Transforms/Utils/Local.cpp
@@ -21,7 +21,6 @@
 #include "llvm/Support/GetElementPtrTypeIterator.h"
 #include "llvm/Support/MathExtras.h"
 #include <cerrno>
-#include <cmath>
 using namespace llvm;
 
 //===----------------------------------------------------------------------===//
diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp
index 28993d52247..64dd1b12348 100644
--- a/lib/VMCore/ConstantFold.cpp
+++ b/lib/VMCore/ConstantFold.cpp
@@ -28,7 +28,6 @@
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MathExtras.h"
 #include <limits>
-#include <cmath>
 using namespace llvm;
 
 namespace {