Fix 'platform-specific' hyphenations

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212056 91177308-0d34-0410-b5e6-96231b3b80d8

docs/CMake.rst

@@ -487,7 +487,7 @@ into LLVM source tree. You can achieve it in two easy steps:
 #. Adding ``add_subdirectory(<pass name>)`` line into
    ``<LLVM root>/lib/Transform/CMakeLists.txt``.
 
-Compiler/Platform specific topics
+Compiler/Platform-specific topics
 =================================
 
 Notes for specific compilers and/or platforms.

docs/CodeGenerator.rst

@@ -2027,7 +2027,7 @@ supported on x86/x86-64 and PowerPC. It is performed if:
 
 * Option ``-tailcallopt`` is enabled.
 
-* Platform specific constraints are met.
+* Platform-specific constraints are met.
 
 x86/x86-64 constraints:
 

docs/GarbageCollection.rst

@@ -633,7 +633,7 @@ Threaded
   Denotes a multithreaded mutator; the collector must still stop the mutator
   ("stop the world") before beginning reachability analysis.  Stopping a
   multithreaded mutator is a complicated problem.  It generally requires highly
-  platform specific code in the runtime, and the production of carefully
+  platform-specific code in the runtime, and the production of carefully
   designed machine code at safe points.
 
 Concurrent

docs/LangRef.rst

@@ -6408,7 +6408,7 @@ This instruction requires several arguments:
       uses value of call or is void).
    -  Option ``-tailcallopt`` is enabled, or
       ``llvm::GuaranteedTailCallOpt`` is ``true``.
-   -  `Platform specific constraints are
+   -  `Platform-specific constraints are
       met. <CodeGenerator.html#tailcallopt>`_
 
 #. The optional "cconv" marker indicates which :ref:`calling