Subzero. Adds a pass for target-specific helper call generation.

src/IceTargetLowering.cpp

 //===- subzero/src/IceTargetLowering.cpp - Basic lowering implementation --===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 119 matching lines @@
                                                            Cfg *Func) {
 #define SUBZERO_TARGET(X)                                                      \
   if (Target == Target_##X)                                                    \
     return std::unique_ptr<Assembler>(new X::Assembler##X());
 #include "llvm/Config/SZTargets.def"
 
   Func->setError("Unsupported target assembler");
   return nullptr;
 }
 
+void TargetLowering::genTargetHelperCalls() {
+  for (CfgNode *Node : Func->getNodes()) {
+    Context.init(Node);
+    while (!Context.atEnd()) {
+      PostIncrLoweringContext _(Context);
+      genTargetHelperCallFor(Context.getCur());
+    }
+  }
+}
+
 void TargetLowering::doAddressOpt() {
   if (llvm::isa<InstLoad>(*Context.getCur()))
     doAddressOptLoad();
   else if (llvm::isa<InstStore>(*Context.getCur()))
     doAddressOptStore();
   Context.advanceCur();
   Context.advanceNext();
 }
 
 void TargetLowering::doNopInsertion(RandomNumberGenerator &RNG) {
@@ skipping 504 matching lines @@
   if (Target == Target_##X)                                                    \
     return TargetHeader##X::create(Ctx);
 #include "llvm/Config/SZTargets.def"
 
   llvm::report_fatal_error("Unsupported target header lowering");
 }
 
 TargetHeaderLowering::~TargetHeaderLowering() = default;
 
 } // end of namespace Ice