Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/lib/Target/Sparc/SparcSubtarget.cpp

@@ -0,0 +1,102 @@
+//===-- SparcSubtarget.cpp - SPARC Subtarget Information ------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the SPARC specific subclass of TargetSubtargetInfo.
+//
+//===----------------------------------------------------------------------===//
+
+#include "SparcSubtarget.h"
+#include "Sparc.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/TargetRegistry.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "sparc-subtarget"
+
+#define GET_SUBTARGETINFO_TARGET_DESC
+#define GET_SUBTARGETINFO_CTOR
+#include "SparcGenSubtargetInfo.inc"
+
+void SparcSubtarget::anchor() { }
+
+SparcSubtarget &SparcSubtarget::initializeSubtargetDependencies(StringRef CPU,
+                                                                StringRef FS) {
+  UseSoftMulDiv = false;
+  IsV9 = false;
+  IsLeon = false;
+  V8DeprecatedInsts = false;
+  IsVIS = false;
+  IsVIS2 = false;
+  IsVIS3 = false;
+  HasHardQuad = false;
+  UsePopc = false;
+  UseSoftFloat = false;
+  HasNoFSMULD = false;
+  HasNoFMULS = false;
+
+  // Leon features
+  HasLeonCasa = false;
+  HasUmacSmac = false;
+  PerformSDIVReplace = false;
+  InsertNOPLoad = false;
+  FixAllFDIVSQRT = false;
+  DetectRoundChange = false;
+
+  // Determine default and user specified characteristics
+  std::string CPUName = CPU;
+  if (CPUName.empty())
+    CPUName = (Is64Bit) ? "v9" : "v8";
+
+  // Parse features string.
+  ParseSubtargetFeatures(CPUName, FS);
+
+  // Popc is a v9-only instruction.
+  if (!IsV9)
+    UsePopc = false;
+
+  return *this;
+}
+
+SparcSubtarget::SparcSubtarget(const Triple &TT, const std::string &CPU,
+                               const std::string &FS, const TargetMachine &TM,
+                               bool is64Bit)
+    : SparcGenSubtargetInfo(TT, CPU, FS), TargetTriple(TT), Is64Bit(is64Bit),
+      InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
+      FrameLowering(*this) {}
+
+int SparcSubtarget::getAdjustedFrameSize(int frameSize) const {
+
+  if (is64Bit()) {
+    // All 64-bit stack frames must be 16-byte aligned, and must reserve space
+    // for spilling the 16 window registers at %sp+BIAS..%sp+BIAS+128.
+    frameSize += 128;
+    // Frames with calls must also reserve space for 6 outgoing arguments
+    // whether they are used or not. LowerCall_64 takes care of that.
+    frameSize = alignTo(frameSize, 16);
+  } else {
+    // Emit the correct save instruction based on the number of bytes in
+    // the frame. Minimum stack frame size according to V8 ABI is:
+    //   16 words for register window spill
+    //    1 word for address of returned aggregate-value
+    // +  6 words for passing parameters on the stack
+    // ----------
+    //   23 words * 4 bytes per word = 92 bytes
+    frameSize += 92;
+
+    // Round up to next doubleword boundary -- a double-word boundary
+    // is required by the ABI.
+    frameSize = alignTo(frameSize, 8);
+  }
+  return frameSize;
+}
+
+bool SparcSubtarget::enableMachineScheduler() const {
+  return true;
+}