Vendor import of llvm release_32 branch r168974 (effectively, 3.2 RC2):

http://llvm.org/svn/llvm-project/llvm/branches/release_32@168974

1 files changed, 78 insertions, 23 deletions

diff --git a/lib/Target/PowerPC/PPCAsmPrinter.cpp b/lib/Target/PowerPC/PPCAsmPrinter.cpp
index f76b89c..15d690b 100644
--- a/lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ b/lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -54,12 +54,13 @@
 #include "llvm/Support/ELF.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/MapVector.h"
 using namespace llvm;
 
 namespace {
   class PPCAsmPrinter : public AsmPrinter {
   protected:
-    DenseMap<MCSymbol*, MCSymbol*> TOC;
+    MapVector<MCSymbol*, MCSymbol*> TOC;
     const PPCSubtarget &Subtarget;
     uint64_t TOCLabelID;
   public:
@@ -109,6 +110,8 @@ namespace {
     bool doFinalization(Module &M);
 
     virtual void EmitFunctionEntryLabel();
+
+    void EmitFunctionBodyEnd();
   };
 
   /// PPCDarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac
@@ -282,8 +285,22 @@ bool PPCAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
                                           unsigned AsmVariant,
                                           const char *ExtraCode,
                                           raw_ostream &O) {
-  if (ExtraCode && ExtraCode[0])
-    return true; // Unknown modifier.
+  if (ExtraCode && ExtraCode[0]) {
+    if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+    switch (ExtraCode[0]) {
+    default: return true;  // Unknown modifier.
+    case 'y': // A memory reference for an X-form instruction
+      {
+        const char *RegName = "r0";
+        if (!Subtarget.isDarwin()) RegName = stripRegisterPrefix(RegName);
+        O << RegName << ", ";
+        printOperand(MI, OpNo, O);
+        return false;
+      }
+    }
+  }
+
   assert(MI->getOperand(OpNo).isReg());
   O << "0(";
   printOperand(MI, OpNo, O);
@@ -345,23 +362,37 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
     OutStreamer.EmitLabel(PICBase);
     return;
   }
+  case PPC::LDtocJTI:
+  case PPC::LDtocCPT:
   case PPC::LDtoc: {
     // Transform %X3 = LDtoc <ga:@min1>, %X2
     LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
-      
+
     // Change the opcode to LD, and the global address operand to be a
     // reference to the TOC entry we will synthesize later.
     TmpInst.setOpcode(PPC::LD);
     const MachineOperand &MO = MI->getOperand(1);
-    assert(MO.isGlobal());
-      
-    // Map symbol -> label of TOC entry.
-    MCSymbol *&TOCEntry = TOC[Mang->getSymbol(MO.getGlobal())];
-    if (TOCEntry == 0)
-      TOCEntry = GetTempSymbol("C", TOCLabelID++);
-      
+
+    // Map symbol -> label of TOC entry
+    assert(MO.isGlobal() || MO.isCPI() || MO.isJTI());
+    MCSymbol *MOSymbol = 0;
+    if (MO.isGlobal())
+      MOSymbol = Mang->getSymbol(MO.getGlobal());
+    else if (MO.isCPI())
+      MOSymbol = GetCPISymbol(MO.getIndex());
+    else if (MO.isJTI())
+      MOSymbol = GetJTISymbol(MO.getIndex());
+    MCSymbol *&TOCEntry = TOC[MOSymbol];
+    // To avoid name clash check if the name already exists.
+    while (TOCEntry == 0) {
+      if (OutContext.LookupSymbol(Twine(MAI->getPrivateGlobalPrefix()) +
+                                  "C" + Twine(TOCLabelID++)) == 0) {
+        TOCEntry = GetTempSymbol("C", TOCLabelID);
+      }
+    }
+
     const MCExpr *Exp =
-      MCSymbolRefExpr::Create(TOCEntry, MCSymbolRefExpr::VK_PPC_TOC,
+      MCSymbolRefExpr::Create(TOCEntry, MCSymbolRefExpr::VK_PPC_TOC_ENTRY,
                               OutContext);
     TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
     OutStreamer.EmitInstruction(TmpInst);
@@ -404,11 +435,17 @@ void PPCLinuxAsmPrinter::EmitFunctionEntryLabel() {
   OutStreamer.EmitValueToAlignment(8);
   MCSymbol *Symbol1 = 
     OutContext.GetOrCreateSymbol(".L." + Twine(CurrentFnSym->getName()));
-  MCSymbol *Symbol2 = OutContext.GetOrCreateSymbol(StringRef(".TOC.@tocbase"));
+  // Generates a R_PPC64_ADDR64 (from FK_DATA_8) relocation for the function
+  // entry point.
   OutStreamer.EmitValue(MCSymbolRefExpr::Create(Symbol1, OutContext),
-                        Subtarget.isPPC64() ? 8 : 4/*size*/, 0/*addrspace*/);
-  OutStreamer.EmitValue(MCSymbolRefExpr::Create(Symbol2, OutContext),
-                        Subtarget.isPPC64() ? 8 : 4/*size*/, 0/*addrspace*/);
+                        8/*size*/, 0/*addrspace*/);
+  MCSymbol *Symbol2 = OutContext.GetOrCreateSymbol(StringRef(".TOC."));
+  // Generates a R_PPC64_TOC relocation for TOC base insertion.
+  OutStreamer.EmitValue(MCSymbolRefExpr::Create(Symbol2,
+                        MCSymbolRefExpr::VK_PPC_TOC, OutContext),
+                        8/*size*/, 0/*addrspace*/);
+  // Emit a null environment pointer.
+  OutStreamer.EmitIntValue(0, 8 /* size */, 0 /* addrspace */);
   OutStreamer.SwitchSection(Current);
 
   MCSymbol *RealFnSym = OutContext.GetOrCreateSymbol(
@@ -419,7 +456,7 @@ void PPCLinuxAsmPrinter::EmitFunctionEntryLabel() {
 
 
 bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
-  const TargetData *TD = TM.getTargetData();
+  const DataLayout *TD = TM.getDataLayout();
 
   bool isPPC64 = TD->getPointerSizeInBits() == 64;
 
@@ -429,18 +466,34 @@ bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
         SectionKind::getReadOnly());
     OutStreamer.SwitchSection(Section);
 
-    // FIXME: This is nondeterminstic!
-    for (DenseMap<MCSymbol*, MCSymbol*>::iterator I = TOC.begin(),
+    for (MapVector<MCSymbol*, MCSymbol*>::iterator I = TOC.begin(),
          E = TOC.end(); I != E; ++I) {
       OutStreamer.EmitLabel(I->second);
-      OutStreamer.EmitRawText("\t.tc " + Twine(I->first->getName()) +
-                              "[TC]," + I->first->getName());
+      MCSymbol *S = OutContext.GetOrCreateSymbol(I->first->getName());
+      OutStreamer.EmitTCEntry(*S);
     }
   }
 
   return AsmPrinter::doFinalization(M);
 }
 
+/// EmitFunctionBodyEnd - Print the traceback table before the .size
+/// directive.
+///
+void PPCLinuxAsmPrinter::EmitFunctionBodyEnd() {
+  // Only the 64-bit target requires a traceback table.  For now,
+  // we only emit the word of zeroes that GDB requires to find
+  // the end of the function, and zeroes for the eight-byte
+  // mandatory fields.
+  // FIXME: We should fill in the eight-byte mandatory fields as described in
+  // the PPC64 ELF ABI (this is a low-priority item because GDB does not
+  // currently make use of these fields).
+  if (Subtarget.isPPC64()) {
+    OutStreamer.EmitIntValue(0, 4/*size*/);
+    OutStreamer.EmitIntValue(0, 8/*size*/);
+  }
+}
+
 void PPCDarwinAsmPrinter::EmitStartOfAsmFile(Module &M) {
   static const char *const CPUDirectives[] = {
     "",
@@ -453,6 +506,8 @@ void PPCDarwinAsmPrinter::EmitStartOfAsmFile(Module &M) {
     "ppc750",
     "ppc970",
     "ppcA2",
+    "ppce500mc",
+    "ppce5500",
     "power6",
     "power7",
     "ppc64"
@@ -508,7 +563,7 @@ static MCSymbol *GetAnonSym(MCSymbol *Sym, MCContext &Ctx) {
 
 void PPCDarwinAsmPrinter::
 EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs) {
-  bool isPPC64 = TM.getTargetData()->getPointerSizeInBits() == 64;
+  bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
   
   const TargetLoweringObjectFileMachO &TLOFMacho = 
     static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
@@ -603,7 +658,7 @@ EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs) {
 
 
 bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
-  bool isPPC64 = TM.getTargetData()->getPointerSizeInBits() == 64;
+  bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
 
   // Darwin/PPC always uses mach-o.
   const TargetLoweringObjectFileMachO &TLOFMacho =