Re-land "[X86] Cache variables that only depend on the subtarget"

[oota-llvm.git] / lib / Target / X86 / X86Subtarget.cpp

diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index e59395c06a5c7fe63c44d2cf9da17adfa51b4f4e..3b25d30dc221a6427611386e74e1f6cd83053dd4 100644 (file)
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -257,15 +257,14 @@ void X86Subtarget::initializeEnvironment() {
   HasVLX = false;
   HasADX = false;
   HasSHA = false;
-  HasSGX = false;
   HasPRFCHW = false;
   HasRDSEED = false;
-  HasSMAP = false;
+  HasMPX = false;
   IsBTMemSlow = false;
   IsSHLDSlow = false;
   IsUAMemFast = false;
   IsUAMem32Slow = false;
-  HasVectorUAMem = false;
+  HasSSEUnalignedMem = false;
   HasCmpxchg16b = false;
   UseLeaForSP = false;
   HasSlowDivide32 = false;
@@ -275,51 +274,10 @@ void X86Subtarget::initializeEnvironment() {
   LEAUsesAG = false;
   SlowLEA = false;
   SlowIncDec = false;
-  UseSqrtEst = false;
-  UseReciprocalEst = false;
   stackAlignment = 4;
   // FIXME: this is a known good value for Yonah. How about others?
   MaxInlineSizeThreshold = 128;
-}
-
-static std::string computeDataLayout(const Triple &TT) {
-  // X86 is little endian
-  std::string Ret = "e";
-
-  Ret += DataLayout::getManglingComponent(TT);
-  // X86 and x32 have 32 bit pointers.
-  if ((TT.isArch64Bit() &&
-       (TT.getEnvironment() == Triple::GNUX32 || TT.isOSNaCl())) ||
-      !TT.isArch64Bit())
-    Ret += "-p:32:32";
-
-  // Some ABIs align 64 bit integers and doubles to 64 bits, others to 32.
-  if (TT.isArch64Bit() || TT.isOSWindows() || TT.isOSNaCl())
-    Ret += "-i64:64";
-  else
-    Ret += "-f64:32:64";
-
-  // Some ABIs align long double to 128 bits, others to 32.
-  if (TT.isOSNaCl())
-    ; // No f80
-  else if (TT.isArch64Bit() || TT.isOSDarwin())
-    Ret += "-f80:128";
-  else
-    Ret += "-f80:32";
-
-  // The registers can hold 8, 16, 32 or, in x86-64, 64 bits.
-  if (TT.isArch64Bit())
-    Ret += "-n8:16:32:64";
-  else
-    Ret += "-n8:16:32";
-
-  // The stack is aligned to 32 bits on some ABIs and 128 bits on others.
-  if (!TT.isArch64Bit() && TT.isOSWindows())
-    Ret += "-S32";
-  else
-    Ret += "-S128";
-
-  return Ret;
+  UseSoftFloat = false;
 }
 
 X86Subtarget &X86Subtarget::initializeSubtargetDependencies(StringRef CPU,
@@ -329,21 +287,20 @@ X86Subtarget &X86Subtarget::initializeSubtargetDependencies(StringRef CPU,
   return *this;
 }
 
-X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU,
+X86Subtarget::X86Subtarget(const Triple &TT, const std::string &CPU,
                            const std::string &FS, const X86TargetMachine &TM,
                            unsigned StackAlignOverride)
     : X86GenSubtargetInfo(TT, CPU, FS), X86ProcFamily(Others),
       PICStyle(PICStyles::None), TargetTriple(TT),
-      DL(computeDataLayout(TargetTriple)),
       StackAlignOverride(StackAlignOverride),
       In64BitMode(TargetTriple.getArch() == Triple::x86_64),
       In32BitMode(TargetTriple.getArch() == Triple::x86 &&
                   TargetTriple.getEnvironment() != Triple::CODE16),
       In16BitMode(TargetTriple.getArch() == Triple::x86 &&
                   TargetTriple.getEnvironment() == Triple::CODE16),
-      TSInfo(DL), InstrInfo(initializeSubtargetDependencies(CPU, FS)),
-      TLInfo(TM), FrameLowering(TargetFrameLowering::StackGrowsDown,
-                                getStackAlignment(), is64Bit() ? -8 : -4) {
+      TSInfo(*TM.getDataLayout()),
+      InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
+      FrameLowering(*this, getStackAlignment()) {
   // Determine the PICStyle based on the target selected.
   if (TM.getRelocationModel() == Reloc::Static) {
     // Unless we're in PIC or DynamicNoPIC mode, set the PIC style to None.