Introduce a pass to insert vzeroupper instructions to avoid AVX to

[oota-llvm.git] / lib / Target / PowerPC / PPCSubtarget.cpp

diff --git a/lib/Target/PowerPC/PPCSubtarget.cpp b/lib/Target/PowerPC/PPCSubtarget.cpp
index e0937e21c10a8891c9a192b63994b616223ea81c..5ea9b0f6596c46ebe1b9e598d2f9b6fcf824ff41 100644 (file)
--- a/lib/Target/PowerPC/PPCSubtarget.cpp
+++ b/lib/Target/PowerPC/PPCSubtarget.cpp
@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file implements the PPC specific subclass of TargetSubtarget.
+// This file implements the PPC specific subclass of TargetSubtargetInfo.
 //
 //===----------------------------------------------------------------------===//
 
@@ -15,8 +15,13 @@
 #include "PPC.h"
 #include "llvm/GlobalValue.h"
 #include "llvm/Target/TargetMachine.h"
-#include "PPCGenSubtarget.inc"
+#include "llvm/Target/TargetRegistry.h"
 #include <cstdlib>
+
+#define GET_SUBTARGETINFO_TARGET_DESC
+#define GET_SUBTARGETINFO_CTOR
+#include "PPCGenSubtargetInfo.inc"
+
 using namespace llvm;
 
 #if defined(__APPLE__)
@@ -57,9 +62,10 @@ static const char *GetCurrentPowerPCCPU() {
 #endif
 
 
-PPCSubtarget::PPCSubtarget(const std::string &TT, const std::string &FS,
-                           bool is64Bit)
-  : StackAlignment(16)
+PPCSubtarget::PPCSubtarget(const std::string &TT, const std::string &CPU,
+                           const std::string &FS, bool is64Bit)
+  : PPCGenSubtargetInfo(TT, CPU, FS)
+  , StackAlignment(16)
   , DarwinDirective(PPC::DIR_NONE)
   , IsGigaProcessor(false)
   , Has64BitSupport(false)
@@ -69,16 +75,23 @@ PPCSubtarget::PPCSubtarget(const std::string &TT, const std::string &FS,
   , HasFSQRT(false)
   , HasSTFIWX(false)
   , HasLazyResolverStubs(false)
-  , DarwinVers(0) {
+  , IsJITCodeModel(false)
+  , TargetTriple(TT) {
 
   // Determine default and user specified characteristics
-  std::string CPU = "generic";
+  std::string CPUName = CPU;
+  if (CPUName.empty())
+    CPUName = "generic";
 #if defined(__APPLE__)
-  CPU = GetCurrentPowerPCCPU();
+  if (CPUName == "generic")
+    CPUName = GetCurrentPowerPCCPU();
 #endif
 
   // Parse features string.
-  ParseSubtargetFeatures(FS, CPU);
+  ParseSubtargetFeatures(CPUName, FS);
+
+  // Initialize scheduling itinerary for the specified CPU.
+  InstrItins = getInstrItineraryForCPU(CPUName);
 
   // If we are generating code for ppc64, verify that options make sense.
   if (is64Bit) {
@@ -91,36 +104,10 @@ PPCSubtarget::PPCSubtarget(const std::string &TT, const std::string &FS,
   // support it, ignore.
   if (use64BitRegs() && !has64BitSupport())
     Use64BitRegs = false;
-  
-  // Set the boolean corresponding to the current target triple, or the default
-  // if one cannot be determined, to true.
-  if (TT.length() > 7) {
-    // Determine which version of darwin this is.
-    size_t DarwinPos = TT.find("-darwin");
-    if (DarwinPos != std::string::npos) {
-      if (isdigit(TT[DarwinPos+7]))
-        DarwinVers = atoi(&TT[DarwinPos+7]);
-      else
-        DarwinVers = 8;  // Minimum supported darwin is Tiger.
-    }
-  } else if (TT.empty()) {
-    // Try to autosense the subtarget from the host compiler.
-#if defined(__APPLE__)
-#if __APPLE_CC__ > 5400
-    DarwinVers = 9;  // GCC 5400+ is Leopard.
-#else
-    DarwinVers = 8;  // Minimum supported darwin is Tiger.
-#endif
-#endif
-  }
 
   // Set up darwin-specific properties.
-  if (isDarwin()) {
+  if (isDarwin())
     HasLazyResolverStubs = true;
-    AsmFlavor = NewMnemonic;
-  } else {
-    AsmFlavor = OldMnemonic;
-  }
 }
 
 /// SetJITMode - This is called to inform the subtarget info that we are
@@ -130,6 +117,9 @@ void PPCSubtarget::SetJITMode() {
   // everything is.  This matters for PPC64, which codegens in PIC mode without
   // stubs.
   HasLazyResolverStubs = false;
+
+  // Calls to external functions need to use indirect calls
+  IsJITCodeModel = true;
 }
 
 
@@ -138,12 +128,12 @@ void PPCSubtarget::SetJITMode() {
 /// is required to get the address of the global.
 bool PPCSubtarget::hasLazyResolverStub(const GlobalValue *GV,
                                        const TargetMachine &TM) const {
-  // We never hae stubs if HasLazyResolverStubs=false or if in static mode.
+  // We never have stubs if HasLazyResolverStubs=false or if in static mode.
   if (!HasLazyResolverStubs || TM.getRelocationModel() == Reloc::Static)
     return false;
   // If symbol visibility is hidden, the extra load is not needed if
   // the symbol is definitely defined in the current translation unit.
-  bool isDecl = GV->isDeclaration() && !GV->hasNotBeenReadFromBitcode();
+  bool isDecl = GV->isDeclaration() && !GV->isMaterializable();
   if (GV->hasHiddenVisibility() && !isDecl && !GV->hasCommonLinkage())
     return false;
   return GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||