Codegen pass definition cleanup. No functionality.

Moving toward a uniform style of pass definition to allow easier target configuration.
Globally declare Pass ID.
Globally declare pass initializer.
Use INITIALIZE_PASS consistently.
Add a call to the initializer from CodeGen.cpp.
Remove redundant "createPass" functions and "getPassName" methods.

While cleaning up declarations, cleaned up comments (sorry for large diff).

llvm-svn: 150100

1 files changed, 1 insertions, 4 deletions

diff --git a/llvm/lib/CodeGen/PeepholeOptimizer.cpp b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
index ced7d838dae..19d41f4dc2e 100644
--- a/llvm/lib/CodeGen/PeepholeOptimizer.cpp
+++ b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
@@ -109,16 +109,13 @@ namespace {
 }
 
 char PeepholeOptimizer::ID = 0;
+char &llvm::PeepholeOptimizerID = PeepholeOptimizer::ID;
 INITIALIZE_PASS_BEGIN(PeepholeOptimizer, "peephole-opts",
                 "Peephole Optimizations", false, false)
 INITIALIZE_PASS_DEPENDENCY(MachineDominatorTree)
 INITIALIZE_PASS_END(PeepholeOptimizer, "peephole-opts",
                 "Peephole Optimizations", false, false)
 
-FunctionPass *llvm::createPeepholeOptimizerPass() {
-  return new PeepholeOptimizer();
-}
-
 /// OptimizeExtInstr - If instruction is a copy-like instruction, i.e. it reads
 /// a single register and writes a single register and it does not modify the
 /// source, and if the source value is preserved as a sub-register of the