Fix typos in comments, NFC

Summary: Just fixing comments, no functional change.

Test Plan: N/A

Reviewers: jfb

Subscribers: mcrosier, llvm-commits

Differential Revision: http://reviews.llvm.org/D5130

llvm-svn: 216784
diff --git a/llvm/lib/CodeGen/AsmPrinter/DIEHash.cpp b/llvm/lib/CodeGen/AsmPrinter/DIEHash.cpp
index c2fad59..b2a3ba8 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DIEHash.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DIEHash.cpp
@@ -261,7 +261,7 @@
     return;
   }
 
-  // otherwise, b) use the letter 'T' as a the marker, ...
+  // otherwise, b) use the letter 'T' as the marker, ...
   addULEB128('T');
 
   addULEB128(Attribute);
diff --git a/llvm/lib/CodeGen/StackColoring.cpp b/llvm/lib/CodeGen/StackColoring.cpp
index 370430c..dcf1b44 100644
--- a/llvm/lib/CodeGen/StackColoring.cpp
+++ b/llvm/lib/CodeGen/StackColoring.cpp
@@ -228,7 +228,7 @@
 unsigned StackColoring::collectMarkers(unsigned NumSlot) {
   unsigned MarkersFound = 0;
   // Scan the function to find all lifetime markers.
-  // NOTE: We use the a reverse-post-order iteration to ensure that we obtain a
+  // NOTE: We use a reverse-post-order iteration to ensure that we obtain a
   // deterministic numbering, and because we'll need a post-order iteration
   // later for solving the liveness dataflow problem.
   for (MachineBasicBlock *MBB : depth_first(MF)) {