Reapplying [FastISel][AArch64] Cleanup constant materialization code. NFCI.

[oota-llvm.git] / lib / Target / Sparc / SparcSubtarget.cpp

diff --git a/lib/Target/Sparc/SparcSubtarget.cpp b/lib/Target/Sparc/SparcSubtarget.cpp
index ba129ec926cf3fb048a65e8242f939a4bd657ca1..eea0c8c33c6ab0122d82a450d61e5c56e41d7ef1 100644 (file)
--- a/lib/Target/Sparc/SparcSubtarget.cpp
+++ b/lib/Target/Sparc/SparcSubtarget.cpp
@@ -16,36 +16,71 @@
 #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"
 
-using namespace llvm;
-
 void SparcSubtarget::anchor() { }
 
-SparcSubtarget::SparcSubtarget(const std::string &TT, const std::string &CPU,
-                               const std::string &FS,  bool is64Bit) :
-  SparcGenSubtargetInfo(TT, CPU, FS),
-  IsV9(false),
-  V8DeprecatedInsts(false),
-  IsVIS(false),
-  Is64Bit(is64Bit) {
-  
+static std::string computeDataLayout(const SparcSubtarget &ST) {
+  // Sparc is big endian.
+  std::string Ret = "E-m:e";
+
+  // Some ABIs have 32bit pointers.
+  if (!ST.is64Bit())
+    Ret += "-p:32:32";
+
+  // Alignments for 64 bit integers.
+  Ret += "-i64:64";
+
+  // On SparcV9 128 floats are aligned to 128 bits, on others only to 64.
+  // On SparcV9 registers can hold 64 or 32 bits, on others only 32.
+  if (ST.is64Bit())
+    Ret += "-n32:64";
+  else
+    Ret += "-f128:64-n32";
+
+  if (ST.is64Bit())
+    Ret += "-S128";
+  else
+    Ret += "-S64";
+
+  return Ret;
+}
+
+SparcSubtarget &SparcSubtarget::initializeSubtargetDependencies(StringRef CPU,
+                                                                StringRef FS) {
+  IsV9 = false;
+  V8DeprecatedInsts = false;
+  IsVIS = false;
+  HasHardQuad = false;
+  UsePopc = false;
+
   // Determine default and user specified characteristics
   std::string CPUName = CPU;
-  if (CPUName.empty()) {
-    if (is64Bit)
-      CPUName = "v9";
-    else
-      CPUName = "v8";
-  }
-  IsV9 = CPUName == "v9";
+  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 std::string &TT, const std::string &CPU,
+                               const std::string &FS, TargetMachine &TM,
+                               bool is64Bit)
+    : SparcGenSubtargetInfo(TT, CPU, FS), Is64Bit(is64Bit),
+      DL(computeDataLayout(initializeSubtargetDependencies(CPU, FS))),
+      InstrInfo(*this), TLInfo(TM), TSInfo(DL), FrameLowering(*this) {}
 
 int SparcSubtarget::getAdjustedFrameSize(int frameSize) const {