[PM] Switch the TargetMachine interface from accepting a pass manager

base which it adds a single analysis pass to, to instead return the type
erased TargetTransformInfo object constructed for that TargetMachine.

This removes all of the pass variants for TTI. There is now a single TTI
*pass* in the Analysis layer. All of the Analysis <-> Target
communication is through the TTI's type erased interface itself. While
the diff is large here, it is nothing more that code motion to make
types available in a header file for use in a different source file
within each target.

I've tried to keep all the doxygen comments and file boilerplate in line
with this move, but let me know if I missed anything.

With this in place, the next step to making TTI work with the new pass
manager is to introduce a really simple new-style analysis that produces
a TTI object via a callback into this routine on the target machine.
Once we have that, we'll have the building blocks necessary to accept
a function argument as well.

llvm-svn: 227685

1 files changed, 67 insertions, 0 deletions

diff --git a/llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h b/llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h
new file mode 100644
index 00000000000..990de81cb7b
--- /dev/null
+++ b/llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h
@@ -0,0 +1,67 @@
+//===-- NVPTXTargetTransformInfo.h - NVPTX specific TTI ---------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+/// \file
+/// This file a TargetTransformInfo::Concept conforming object specific to the
+/// NVPTX target machine. It uses the target's detailed information to
+/// provide more precise answers to certain TTI queries, while letting the
+/// target independent and default TTI implementations handle the rest.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_NVPTX_NVPTXTARGETTRANSFORMINFO_H
+#define LLVM_LIB_TARGET_NVPTX_NVPTXTARGETTRANSFORMINFO_H
+
+#include "NVPTX.h"
+#include "NVPTXTargetMachine.h"
+#include "llvm/Analysis/TargetTransformInfo.h"
+#include "llvm/CodeGen/BasicTTIImpl.h"
+#include "llvm/Target/TargetLowering.h"
+
+namespace llvm {
+
+class NVPTXTTIImpl : public BasicTTIImplBase<NVPTXTTIImpl> {
+  typedef BasicTTIImplBase<NVPTXTTIImpl> BaseT;
+  typedef TargetTransformInfo TTI;
+
+  const NVPTXTargetLowering *TLI;
+
+public:
+  explicit NVPTXTTIImpl(const NVPTXTargetMachine *TM = nullptr)
+      : BaseT(TM),
+        TLI(TM ? TM->getSubtargetImpl()->getTargetLowering() : nullptr) {}
+
+  // Provide value semantics. MSVC requires that we spell all of these out.
+  NVPTXTTIImpl(const NVPTXTTIImpl &Arg)
+      : BaseT(static_cast<const BaseT &>(Arg)), TLI(Arg.TLI) {}
+  NVPTXTTIImpl(NVPTXTTIImpl &&Arg)
+      : BaseT(std::move(static_cast<BaseT &>(Arg))), TLI(std::move(Arg.TLI)) {}
+  NVPTXTTIImpl &operator=(const NVPTXTTIImpl &RHS) {
+    BaseT::operator=(static_cast<const BaseT &>(RHS));
+    TLI = RHS.TLI;
+    return *this;
+  }
+  NVPTXTTIImpl &operator=(NVPTXTTIImpl &&RHS) {
+    BaseT::operator=(std::move(static_cast<BaseT &>(RHS)));
+    TLI = std::move(RHS.TLI);
+    return *this;
+  }
+
+  bool hasBranchDivergence() { return true; }
+
+  unsigned getArithmeticInstrCost(
+      unsigned Opcode, Type *Ty,
+      TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
+      TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
+      TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
+      TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None);
+};
+
+} // end namespace llvm
+
+#endif