[CodeGen] Rename functions PrintReg* to printReg*

LLVM Coding Standards:
  Function names should be verb phrases (as they represent actions), and
  command-like function should be imperative. The name should be camel
  case, and start with a lower case letter (e.g. openFile() or isFoo()).

Differential Revision: https://reviews.llvm.org/D40416

llvm-svn: 319168
diff --git a/llvm/lib/Target/AMDGPU/SIOptimizeExecMasking.cpp b/llvm/lib/Target/AMDGPU/SIOptimizeExecMasking.cpp
index 4f3fb97..aa95161 100644
--- a/llvm/lib/Target/AMDGPU/SIOptimizeExecMasking.cpp
+++ b/llvm/lib/Target/AMDGPU/SIOptimizeExecMasking.cpp
@@ -281,7 +281,7 @@
       if (J->modifiesRegister(CopyToExec, TRI)) {
         if (SaveExecInst) {
           DEBUG(dbgs() << "Multiple instructions modify "
-                << PrintReg(CopyToExec, TRI) << '\n');
+                << printReg(CopyToExec, TRI) << '\n');
           SaveExecInst = nullptr;
           break;
         }