From 6de2c08bc400b4aca9fb46684e8bdb56eed9b09f Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Sun, 2 Dec 2012 13:10:19 +0000
Subject: Vendor import of llvm release_32 branch r168974 (effectively, 3.2
RC2): http://llvm.org/svn/llvm-project/llvm/branches/release_32@168974
---
lib/Target/PowerPC/PPCAsmPrinter.cpp | 101 +++++++++++++++++++++++++++--------
1 file changed, 78 insertions(+), 23 deletions(-)
(limited to 'lib/Target/PowerPC/PPCAsmPrinter.cpp')
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 =
--
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