Fix known typos

Sweep the codebase for common typos. Includes some changes to visible function
names that were misspelt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200018 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/ScheduleDAGInstrs.h

@@ -94,7 +94,7 @@ namespace llvm {
 
     /// The standard DAG builder does not normally include terminators as DAG
     /// nodes because it does not create the necessary dependencies to prevent
-    /// reordering. A specialized scheduler can overide
+    /// reordering. A specialized scheduler can override
     /// TargetInstrInfo::isSchedulingBoundary then enable this flag to indicate
     /// it has taken responsibility for scheduling the terminator correctly.
     bool CanHandleTerminators;

include/llvm/CodeGen/TargetSchedule.h

@@ -158,7 +158,7 @@ public:
   /// model.
   ///
   /// Compute and return the expected latency of this instruction independent of
-  /// a particular use. computeOperandLatency is the prefered API, but this is
+  /// a particular use. computeOperandLatency is the preferred API, but this is
   /// occasionally useful to help estimate instruction cost.
   ///
   /// If UseDefaultDefLatency is false and no new machine sched model is

include/llvm/Support/Compression.h

@@ -33,11 +33,11 @@ enum CompressionLevel {
 
 enum Status {
   StatusOK,
-  StatusUnsupported,  // zlib is unavaliable
-  StatusOutOfMemory,  // there was not enough memory
-  StatusBufferTooShort,  // there was not enough room in the output buffer
-  StatusInvalidArg,  // invalid input parameter
-  StatusInvalidData  // data was corrupted or incomplete
+  StatusUnsupported,    // zlib is unavailable
+  StatusOutOfMemory,    // there was not enough memory
+  StatusBufferTooShort, // there was not enough room in the output buffer
+  StatusInvalidArg,     // invalid input parameter
+  StatusInvalidData     // data was corrupted or incomplete
 };
 
 bool isAvailable();

include/llvm/Support/Memory.h

@@ -95,7 +95,7 @@ namespace sys {
     /// memory was not allocated using the allocateMappedMemory method.
     /// \p Block describes the memory block to be protected.
     /// \p Flags specifies the new protection state to be assigned to the block.
-    /// \p ErrMsg [out] returns a string describing any error that occured.
+    /// \p ErrMsg [out] returns a string describing any error that occurred.
     ///
     /// If \p Flags is MF_WRITE, the actual behavior varies
     /// with the operating system (i.e. MF_READ | MF_WRITE on Windows) and the

include/llvm/Transforms/Utils/ASanStackFrameLayout.h

@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This header defines ComputeASanStackFrameLayout and auxilary data structs.
+// This header defines ComputeASanStackFrameLayout and auxiliary data structs.
 //
 //===----------------------------------------------------------------------===//
 #ifndef LLVM_TRANSFORMS_UTILS_ASANSTACKFRAMELAYOUT_H