TargetSubtargetInfo: Move implementation to lib/CodeGen; NFC

TargetSubtargetInfo is filled with CodeGen specific interfaces nowadays
(getInstrInfo(), getFrameLowering(), getSelectionDAGInfo()) most of the
tuning flags like enablePostRAScheduler(), getAntiDepBreakMode(),
enableRALocalReassignment(), ... also do not seem to be universal enough
to make sense outside of CodeGen.

Differential Revision: https://reviews.llvm.org/D26948

llvm-svn: 287708

1 files changed, 54 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/TargetSubtargetInfo.cpp b/llvm/lib/CodeGen/TargetSubtargetInfo.cpp
new file mode 100644
index 00000000000..c74707d95b9
--- /dev/null
+++ b/llvm/lib/CodeGen/TargetSubtargetInfo.cpp
@@ -0,0 +1,54 @@
+//===-- TargetSubtargetInfo.cpp - General Target Information ---------------==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file This file describes the general parts of a Subtarget.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Target/TargetSubtargetInfo.h"
+using namespace llvm;
+
+//---------------------------------------------------------------------------
+// TargetSubtargetInfo Class
+//
+TargetSubtargetInfo::TargetSubtargetInfo(
+    const Triple &TT, StringRef CPU, StringRef FS,
+    ArrayRef<SubtargetFeatureKV> PF, ArrayRef<SubtargetFeatureKV> PD,
+    const SubtargetInfoKV *ProcSched, const MCWriteProcResEntry *WPR,
+    const MCWriteLatencyEntry *WL, const MCReadAdvanceEntry *RA,
+    const InstrStage *IS, const unsigned *OC, const unsigned *FP)
+    : MCSubtargetInfo(TT, CPU, FS, PF, PD, ProcSched, WPR, WL, RA, IS, OC, FP) {
+}
+
+TargetSubtargetInfo::~TargetSubtargetInfo() {}
+
+bool TargetSubtargetInfo::enableAtomicExpand() const {
+  return true;
+}
+
+bool TargetSubtargetInfo::enableMachineScheduler() const {
+  return false;
+}
+
+bool TargetSubtargetInfo::enableJoinGlobalCopies() const {
+  return enableMachineScheduler();
+}
+
+bool TargetSubtargetInfo::enableRALocalReassignment(
+    CodeGenOpt::Level OptLevel) const {
+  return true;
+}
+
+bool TargetSubtargetInfo::enablePostRAScheduler() const {
+  return getSchedModel().PostRAScheduler;
+}
+
+bool TargetSubtargetInfo::useAA() const {
+  return false;
+}