Index: wasm/Driver.cpp
===================================================================
--- wasm/Driver.cpp
+++ wasm/Driver.cpp
@@ -136,7 +136,7 @@
 
 // Inject a new wasm global into the output binary with the given value.
 // Wasm global are used in relocatable object files to model symbol imports
-// and exports.  In the final exectuable the only use of wasm globals is the
+// and exports.  In the final executable the only use of wasm globals is
 // for the exlicit stack pointer (__stack_pointer).
 static void addSyntheticGlobal(StringRef Name, int32_t Value) {
   log("injecting global: " + Name);
Index: wasm/SymbolTable.cpp
===================================================================
--- wasm/SymbolTable.cpp
+++ wasm/SymbolTable.cpp
@@ -166,14 +166,14 @@
     S->update(Kind, F, Sym, Segment, NewSig);
   } else if (!S->isDefined()) {
     // The existing symbol table entry is undefined. The new symbol replaces
-    // it, after checkign the type matches
+    // it, after checking the type matches
     DEBUG(dbgs() << "resolving existing undefined symbol: " << Sym->Name
                  << "\n");
     checkSymbolTypes(*S, *F, *Sym, NewSig);
     S->update(Kind, F, Sym, Segment, NewSig);
   } else if (Sym->isWeak()) {
     // the new symbol is weak we can ignore it
-    DEBUG(dbgs() << "existing symbol takes precensence\n");
+    DEBUG(dbgs() << "existing symbol takes precedence\n");
   } else if (S->isWeak()) {
     // the new symbol is not weak and the existing symbol is, so we replace
     // it
@@ -181,7 +181,7 @@
     checkSymbolTypes(*S, *F, *Sym, NewSig);
     S->update(Kind, F, Sym, Segment, NewSig);
   } else {
-    // niether symbol is week. They conflict.
+    // neither symbol is week. They conflict.
     reportDuplicate(S, F);
   }
   return S;
Index: wasm/Writer.cpp
===================================================================
--- wasm/Writer.cpp
+++ wasm/Writer.cpp
@@ -409,7 +409,7 @@
   }
 }
 
-// Create the custome "linking" section containing linker metadata.
+// Create the custom "linking" section containing linker metadata.
 // This is only created when relocatable output is requested.
 void Writer::createLinkingSection() {
   SyntheticSection *Section =
@@ -480,7 +480,7 @@
 }
 
 // Fix the memory layout of the output binary.  This assigns memory offsets
-// to each of the intput data sections as well as the explicit stack region.
+// to each of the input data sections as well as the explicit stack region.
 void Writer::layoutMemory() {
   uint32_t MemoryPtr = 0;
   if (!Config->Relocatable) {