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path: root/lib/Target/PowerPC/PPCAsmPrinter.cpp
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-rw-r--r--lib/Target/PowerPC/PPCAsmPrinter.cpp440
1 files changed, 353 insertions, 87 deletions
diff --git a/lib/Target/PowerPC/PPCAsmPrinter.cpp b/lib/Target/PowerPC/PPCAsmPrinter.cpp
index fd044d9..5648873 100644
--- a/lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ b/lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -18,6 +18,7 @@
#include "PPC.h"
#include "InstPrinter/PPCInstPrinter.h"
+#include "PPCMachineFunctionInfo.h"
#include "MCTargetDesc/PPCMCExpr.h"
#include "MCTargetDesc/PPCPredicates.h"
#include "PPCSubtarget.h"
@@ -27,10 +28,12 @@
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DebugInfo.h"
@@ -100,9 +103,11 @@ namespace {
}
bool doFinalization(Module &M) override;
+ void EmitStartOfAsmFile(Module &M) override;
void EmitFunctionEntryLabel() override;
+ void EmitFunctionBodyStart() override;
void EmitFunctionBodyEnd() override;
};
@@ -142,7 +147,7 @@ static const char *stripRegisterPrefix(const char *RegName) {
void PPCAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
raw_ostream &O) {
- const DataLayout *DL = TM.getDataLayout();
+ const DataLayout *DL = TM.getSubtargetImpl()->getDataLayout();
const MachineOperand &MO = MI->getOperand(OpNo);
switch (MO.getType()) {
@@ -270,6 +275,18 @@ bool PPCAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
printOperand(MI, OpNo, O);
return false;
}
+ case 'U': // Print 'u' for update form.
+ case 'X': // Print 'x' for indexed form.
+ {
+ // FIXME: Currently for PowerPC memory operands are always loaded
+ // into a register, so we never get an update or indexed form.
+ // This is bad even for offset forms, since even if we know we
+ // have a value in -16(r1), we will generate a load into r<n>
+ // and then load from 0(r<n>). Until that issue is fixed,
+ // tolerate 'U' and 'X' but don't output anything.
+ assert(MI->getOperand(OpNo).isReg());
+ return false;
+ }
}
}
@@ -285,7 +302,7 @@ bool PPCAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
/// exists for it. If not, create one. Then return a symbol that references
/// the TOC entry.
MCSymbol *PPCAsmPrinter::lookUpOrCreateTOCEntry(MCSymbol *Sym) {
- const DataLayout *DL = TM.getDataLayout();
+ const DataLayout *DL = TM.getSubtargetImpl()->getDataLayout();
MCSymbol *&TOCEntry = TOC[Sym];
// To avoid name clash check if the name already exists.
@@ -306,12 +323,35 @@ MCSymbol *PPCAsmPrinter::lookUpOrCreateTOCEntry(MCSymbol *Sym) {
void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
MCInst TmpInst;
bool isPPC64 = Subtarget.isPPC64();
+ bool isDarwin = Triple(TM.getTargetTriple()).isOSDarwin();
+ const Module *M = MF->getFunction()->getParent();
+ PICLevel::Level PL = M->getPICLevel();
// Lower multi-instruction pseudo operations.
switch (MI->getOpcode()) {
default: break;
case TargetOpcode::DBG_VALUE:
llvm_unreachable("Should be handled target independently");
+ case PPC::MoveGOTtoLR: {
+ // Transform %LR = MoveGOTtoLR
+ // Into this: bl _GLOBAL_OFFSET_TABLE_@local-4
+ // _GLOBAL_OFFSET_TABLE_@local-4 (instruction preceding
+ // _GLOBAL_OFFSET_TABLE_) has exactly one instruction:
+ // blrl
+ // This will return the pointer to _GLOBAL_OFFSET_TABLE_@local
+ MCSymbol *GOTSymbol =
+ OutContext.GetOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
+ const MCExpr *OffsExpr =
+ MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(GOTSymbol,
+ MCSymbolRefExpr::VK_PPC_LOCAL,
+ OutContext),
+ MCConstantExpr::Create(4, OutContext),
+ OutContext);
+
+ // Emit the 'bl'.
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL).addExpr(OffsExpr));
+ return;
+ }
case PPC::MovePCtoLR:
case PPC::MovePCtoLR8: {
// Transform %LR = MovePCtoLR
@@ -330,11 +370,85 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
OutStreamer.EmitLabel(PICBase);
return;
}
+ case PPC::UpdateGBR: {
+ // Transform %Rd = UpdateGBR(%Rt, %Ri)
+ // Into: lwz %Rt, .L0$poff - .L0$pb(%Ri)
+ // add %Rd, %Rt, %Ri
+ // Get the offset from the GOT Base Register to the GOT
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
+ MCSymbol *PICOffset =
+ MF->getInfo<PPCFunctionInfo>()->getPICOffsetSymbol();
+ TmpInst.setOpcode(PPC::LWZ);
+ const MCExpr *Exp =
+ MCSymbolRefExpr::Create(PICOffset, MCSymbolRefExpr::VK_None, OutContext);
+ const MCExpr *PB =
+ MCSymbolRefExpr::Create(MF->getPICBaseSymbol(),
+ MCSymbolRefExpr::VK_None,
+ OutContext);
+ const MCOperand TR = TmpInst.getOperand(1);
+ const MCOperand PICR = TmpInst.getOperand(0);
+
+ // Step 1: lwz %Rt, .L$poff - .L$pb(%Ri)
+ TmpInst.getOperand(1) =
+ MCOperand::CreateExpr(MCBinaryExpr::CreateSub(Exp, PB, OutContext));
+ TmpInst.getOperand(0) = TR;
+ TmpInst.getOperand(2) = PICR;
+ EmitToStreamer(OutStreamer, TmpInst);
+
+ TmpInst.setOpcode(PPC::ADD4);
+ TmpInst.getOperand(0) = PICR;
+ TmpInst.getOperand(1) = TR;
+ TmpInst.getOperand(2) = PICR;
+ EmitToStreamer(OutStreamer, TmpInst);
+ return;
+ }
+ case PPC::LWZtoc: {
+ // Transform %R3 = LWZtoc <ga:@min1>, %R2
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
+
+ // Change the opcode to LWZ, and the global address operand to be a
+ // reference to the GOT entry we will synthesize later.
+ TmpInst.setOpcode(PPC::LWZ);
+ const MachineOperand &MO = MI->getOperand(1);
+
+ // Map symbol -> label of TOC entry
+ assert(MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isBlockAddress());
+ MCSymbol *MOSymbol = nullptr;
+ if (MO.isGlobal())
+ MOSymbol = getSymbol(MO.getGlobal());
+ else if (MO.isCPI())
+ MOSymbol = GetCPISymbol(MO.getIndex());
+ else if (MO.isJTI())
+ MOSymbol = GetJTISymbol(MO.getIndex());
+ else if (MO.isBlockAddress())
+ MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
+
+ if (PL == PICLevel::Small) {
+ const MCExpr *Exp =
+ MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_GOT,
+ OutContext);
+ TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
+ } else {
+ MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
+
+ const MCExpr *Exp =
+ MCSymbolRefExpr::Create(TOCEntry, MCSymbolRefExpr::VK_None,
+ OutContext);
+ const MCExpr *PB =
+ MCSymbolRefExpr::Create(OutContext.GetOrCreateSymbol(Twine(".LTOC")),
+ OutContext);
+ Exp = MCBinaryExpr::CreateSub(Exp, PB, OutContext);
+ TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
+ }
+ EmitToStreamer(OutStreamer, TmpInst);
+ return;
+ }
case PPC::LDtocJTI:
case PPC::LDtocCPT:
+ case PPC::LDtocBA:
case PPC::LDtoc: {
// Transform %X3 = LDtoc <ga:@min1>, %X2
- LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
// Change the opcode to LD, and the global address operand to be a
// reference to the TOC entry we will synthesize later.
@@ -342,7 +456,7 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
const MachineOperand &MO = MI->getOperand(1);
// Map symbol -> label of TOC entry
- assert(MO.isGlobal() || MO.isCPI() || MO.isJTI());
+ assert(MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isBlockAddress());
MCSymbol *MOSymbol = nullptr;
if (MO.isGlobal())
MOSymbol = getSymbol(MO.getGlobal());
@@ -350,6 +464,8 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
MOSymbol = GetCPISymbol(MO.getIndex());
else if (MO.isJTI())
MOSymbol = GetJTISymbol(MO.getIndex());
+ else if (MO.isBlockAddress())
+ MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
@@ -363,7 +479,7 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
case PPC::ADDIStocHA: {
// Transform %Xd = ADDIStocHA %X2, <ga:@sym>
- LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
// Change the opcode to ADDIS8. If the global address is external, has
// common linkage, is a non-local function address, or is a jump table
@@ -371,7 +487,8 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
// reference the symbol directly.
TmpInst.setOpcode(PPC::ADDIS8);
const MachineOperand &MO = MI->getOperand(2);
- assert((MO.isGlobal() || MO.isCPI() || MO.isJTI()) &&
+ assert((MO.isGlobal() || MO.isCPI() || MO.isJTI() ||
+ MO.isBlockAddress()) &&
"Invalid operand for ADDIStocHA!");
MCSymbol *MOSymbol = nullptr;
bool IsExternal = false;
@@ -391,9 +508,12 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
MOSymbol = GetCPISymbol(MO.getIndex());
else if (MO.isJTI())
MOSymbol = GetJTISymbol(MO.getIndex());
+ else if (MO.isBlockAddress())
+ MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
if (IsExternal || IsNonLocalFunction || IsCommon || IsAvailExt ||
- MO.isJTI() || TM.getCodeModel() == CodeModel::Large)
+ MO.isJTI() || MO.isBlockAddress() ||
+ TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
const MCExpr *Exp =
@@ -405,19 +525,24 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
}
case PPC::LDtocL: {
// Transform %Xd = LDtocL <ga:@sym>, %Xs
- LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
// Change the opcode to LD. If the global address is external, has
// common linkage, or is a jump table address, then reference the
// associated TOC entry. Otherwise reference the symbol directly.
TmpInst.setOpcode(PPC::LD);
const MachineOperand &MO = MI->getOperand(1);
- assert((MO.isGlobal() || MO.isJTI() || MO.isCPI()) &&
+ assert((MO.isGlobal() || MO.isCPI() || MO.isJTI() ||
+ MO.isBlockAddress()) &&
"Invalid operand for LDtocL!");
MCSymbol *MOSymbol = nullptr;
if (MO.isJTI())
MOSymbol = lookUpOrCreateTOCEntry(GetJTISymbol(MO.getIndex()));
+ else if (MO.isBlockAddress()) {
+ MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
+ MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
+ }
else if (MO.isCPI()) {
MOSymbol = GetCPISymbol(MO.getIndex());
if (TM.getCodeModel() == CodeModel::Large)
@@ -442,7 +567,7 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
}
case PPC::ADDItocL: {
// Transform %Xd = ADDItocL %Xs, <ga:@sym>
- LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
// Change the opcode to ADDI8. If the global address is external, then
// generate a TOC entry and reference that. Otherwise reference the
@@ -493,7 +618,7 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
case PPC::LDgotTprelL:
case PPC::LDgotTprelL32: {
// Transform %Xd = LDgotTprelL <ga:@sym>, %Xs
- LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
// Change the opcode to LD.
TmpInst.setOpcode(isPPC64 ? PPC::LD : PPC::LWZ);
@@ -508,6 +633,34 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
return;
}
+ case PPC::PPC32PICGOT: {
+ MCSymbol *GOTSymbol = OutContext.GetOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
+ MCSymbol *GOTRef = OutContext.CreateTempSymbol();
+ MCSymbol *NextInstr = OutContext.CreateTempSymbol();
+
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL)
+ // FIXME: We would like an efficient form for this, so we don't have to do
+ // a lot of extra uniquing.
+ .addExpr(MCSymbolRefExpr::Create(NextInstr, OutContext)));
+ const MCExpr *OffsExpr =
+ MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(GOTSymbol, OutContext),
+ MCSymbolRefExpr::Create(GOTRef, OutContext),
+ OutContext);
+ OutStreamer.EmitLabel(GOTRef);
+ OutStreamer.EmitValue(OffsExpr, 4);
+ OutStreamer.EmitLabel(NextInstr);
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MFLR)
+ .addReg(MI->getOperand(0).getReg()));
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::LWZ)
+ .addReg(MI->getOperand(1).getReg())
+ .addImm(0)
+ .addReg(MI->getOperand(0).getReg()));
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADD4)
+ .addReg(MI->getOperand(0).getReg())
+ .addReg(MI->getOperand(1).getReg())
+ .addReg(MI->getOperand(0).getReg()));
+ return;
+ }
case PPC::PPC32GOT: {
MCSymbol *GOTSymbol = OutContext.GetOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
const MCExpr *SymGotTlsL =
@@ -541,40 +694,25 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
.addExpr(SymGotTlsGD));
return;
}
- case PPC::ADDItlsgdL: {
+ case PPC::ADDItlsgdL:
// Transform: %Xd = ADDItlsgdL %Xs, <ga:@sym>
// Into: %Xd = ADDI8 %Xs, sym@got@tlsgd@l
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
+ case PPC::ADDItlsgdL32: {
+ // Transform: %Rd = ADDItlsgdL32 %Rs, <ga:@sym>
+ // Into: %Rd = ADDI %Rs, sym@got@tlsgd
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymGotTlsGD =
- MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO,
- OutContext);
- EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDI8)
- .addReg(MI->getOperand(0).getReg())
- .addReg(MI->getOperand(1).getReg())
- .addExpr(SymGotTlsGD));
- return;
- }
- case PPC::GETtlsADDR: {
- // Transform: %X3 = GETtlsADDR %X3, <ga:@sym>
- // Into: BL8_NOP_TLS __tls_get_addr(sym@tlsgd)
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
-
- StringRef Name = "__tls_get_addr";
- MCSymbol *TlsGetAddr = OutContext.GetOrCreateSymbol(Name);
- const MCSymbolRefExpr *TlsRef =
- MCSymbolRefExpr::Create(TlsGetAddr, MCSymbolRefExpr::VK_None, OutContext);
- const MachineOperand &MO = MI->getOperand(2);
- const GlobalValue *GValue = MO.getGlobal();
- MCSymbol *MOSymbol = getSymbol(GValue);
- const MCExpr *SymVar =
- MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TLSGD,
+ MCSymbolRefExpr::Create(MOSymbol, Subtarget.isPPC64() ?
+ MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO :
+ MCSymbolRefExpr::VK_PPC_GOT_TLSGD,
OutContext);
- EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL8_NOP_TLS)
- .addExpr(TlsRef)
- .addExpr(SymVar));
+ EmitToStreamer(OutStreamer,
+ MCInstBuilder(Subtarget.isPPC64() ? PPC::ADDI8 : PPC::ADDI)
+ .addReg(MI->getOperand(0).getReg())
+ .addReg(MI->getOperand(1).getReg())
+ .addExpr(SymGotTlsGD));
return;
}
case PPC::ADDIStlsldHA: {
@@ -593,72 +731,63 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
.addExpr(SymGotTlsLD));
return;
}
- case PPC::ADDItlsldL: {
+ case PPC::ADDItlsldL:
// Transform: %Xd = ADDItlsldL %Xs, <ga:@sym>
// Into: %Xd = ADDI8 %Xs, sym@got@tlsld@l
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
+ case PPC::ADDItlsldL32: {
+ // Transform: %Rd = ADDItlsldL32 %Rs, <ga:@sym>
+ // Into: %Rd = ADDI %Rs, sym@got@tlsld
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymGotTlsLD =
- MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO,
- OutContext);
- EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDI8)
- .addReg(MI->getOperand(0).getReg())
- .addReg(MI->getOperand(1).getReg())
- .addExpr(SymGotTlsLD));
- return;
- }
- case PPC::GETtlsldADDR: {
- // Transform: %X3 = GETtlsldADDR %X3, <ga:@sym>
- // Into: BL8_NOP_TLS __tls_get_addr(sym@tlsld)
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
-
- StringRef Name = "__tls_get_addr";
- MCSymbol *TlsGetAddr = OutContext.GetOrCreateSymbol(Name);
- const MCSymbolRefExpr *TlsRef =
- MCSymbolRefExpr::Create(TlsGetAddr, MCSymbolRefExpr::VK_None, OutContext);
- const MachineOperand &MO = MI->getOperand(2);
- const GlobalValue *GValue = MO.getGlobal();
- MCSymbol *MOSymbol = getSymbol(GValue);
- const MCExpr *SymVar =
- MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TLSLD,
+ MCSymbolRefExpr::Create(MOSymbol, Subtarget.isPPC64() ?
+ MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO :
+ MCSymbolRefExpr::VK_PPC_GOT_TLSLD,
OutContext);
- EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL8_NOP_TLS)
- .addExpr(TlsRef)
- .addExpr(SymVar));
+ EmitToStreamer(OutStreamer,
+ MCInstBuilder(Subtarget.isPPC64() ? PPC::ADDI8 : PPC::ADDI)
+ .addReg(MI->getOperand(0).getReg())
+ .addReg(MI->getOperand(1).getReg())
+ .addExpr(SymGotTlsLD));
return;
}
- case PPC::ADDISdtprelHA: {
+ case PPC::ADDISdtprelHA:
// Transform: %Xd = ADDISdtprelHA %X3, <ga:@sym>
// Into: %Xd = ADDIS8 %X3, sym@dtprel@ha
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
+ case PPC::ADDISdtprelHA32: {
+ // Transform: %Rd = ADDISdtprelHA32 %R3, <ga:@sym>
+ // Into: %Rd = ADDIS %R3, sym@dtprel@ha
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymDtprel =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL_HA,
OutContext);
- EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS8)
- .addReg(MI->getOperand(0).getReg())
- .addReg(PPC::X3)
- .addExpr(SymDtprel));
+ EmitToStreamer(OutStreamer,
+ MCInstBuilder(Subtarget.isPPC64() ? PPC::ADDIS8 : PPC::ADDIS)
+ .addReg(MI->getOperand(0).getReg())
+ .addReg(Subtarget.isPPC64() ? PPC::X3 : PPC::R3)
+ .addExpr(SymDtprel));
return;
}
- case PPC::ADDIdtprelL: {
+ case PPC::ADDIdtprelL:
// Transform: %Xd = ADDIdtprelL %Xs, <ga:@sym>
// Into: %Xd = ADDI8 %Xs, sym@dtprel@l
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
+ case PPC::ADDIdtprelL32: {
+ // Transform: %Rd = ADDIdtprelL32 %Rs, <ga:@sym>
+ // Into: %Rd = ADDI %Rs, sym@dtprel@l
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymDtprel =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL_LO,
OutContext);
- EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDI8)
- .addReg(MI->getOperand(0).getReg())
- .addReg(MI->getOperand(1).getReg())
- .addExpr(SymDtprel));
+ EmitToStreamer(OutStreamer,
+ MCInstBuilder(Subtarget.isPPC64() ? PPC::ADDI8 : PPC::ADDI)
+ .addReg(MI->getOperand(0).getReg())
+ .addReg(MI->getOperand(1).getReg())
+ .addExpr(SymDtprel));
return;
}
case PPC::MFOCRF:
@@ -713,14 +842,77 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
}
}
- LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
EmitToStreamer(OutStreamer, TmpInst);
}
+void PPCLinuxAsmPrinter::EmitStartOfAsmFile(Module &M) {
+ if (Subtarget.isELFv2ABI()) {
+ PPCTargetStreamer *TS =
+ static_cast<PPCTargetStreamer *>(OutStreamer.getTargetStreamer());
+
+ if (TS)
+ TS->emitAbiVersion(2);
+ }
+
+ if (Subtarget.isPPC64() || TM.getRelocationModel() != Reloc::PIC_)
+ return AsmPrinter::EmitStartOfAsmFile(M);
+
+ if (M.getPICLevel() == PICLevel::Small)
+ return AsmPrinter::EmitStartOfAsmFile(M);
+
+ OutStreamer.SwitchSection(OutContext.getELFSection(".got2",
+ ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
+ SectionKind::getReadOnly()));
+
+ MCSymbol *TOCSym = OutContext.GetOrCreateSymbol(Twine(".LTOC"));
+ MCSymbol *CurrentPos = OutContext.CreateTempSymbol();
+
+ OutStreamer.EmitLabel(CurrentPos);
+
+ // The GOT pointer points to the middle of the GOT, in order to reference the
+ // entire 64kB range. 0x8000 is the midpoint.
+ const MCExpr *tocExpr =
+ MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(CurrentPos, OutContext),
+ MCConstantExpr::Create(0x8000, OutContext),
+ OutContext);
+
+ OutStreamer.EmitAssignment(TOCSym, tocExpr);
+
+ OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
+}
+
void PPCLinuxAsmPrinter::EmitFunctionEntryLabel() {
- if (!Subtarget.isPPC64()) // linux/ppc32 - Normal entry label.
+ // linux/ppc32 - Normal entry label.
+ if (!Subtarget.isPPC64() &&
+ (TM.getRelocationModel() != Reloc::PIC_ ||
+ MF->getFunction()->getParent()->getPICLevel() == PICLevel::Small))
return AsmPrinter::EmitFunctionEntryLabel();
-
+
+ if (!Subtarget.isPPC64()) {
+ const PPCFunctionInfo *PPCFI = MF->getInfo<PPCFunctionInfo>();
+ if (PPCFI->usesPICBase()) {
+ MCSymbol *RelocSymbol = PPCFI->getPICOffsetSymbol();
+ MCSymbol *PICBase = MF->getPICBaseSymbol();
+ OutStreamer.EmitLabel(RelocSymbol);
+
+ const MCExpr *OffsExpr =
+ MCBinaryExpr::CreateSub(
+ MCSymbolRefExpr::Create(OutContext.GetOrCreateSymbol(Twine(".LTOC")),
+ OutContext),
+ MCSymbolRefExpr::Create(PICBase, OutContext),
+ OutContext);
+ OutStreamer.EmitValue(OffsExpr, 4);
+ OutStreamer.EmitLabel(CurrentFnSym);
+ return;
+ } else
+ return AsmPrinter::EmitFunctionEntryLabel();
+ }
+
+ // ELFv2 ABI - Normal entry label.
+ if (Subtarget.isELFv2ABI())
+ return AsmPrinter::EmitFunctionEntryLabel();
+
// Emit an official procedure descriptor.
MCSectionSubPair Current = OutStreamer.getCurrentSection();
const MCSectionELF *Section = OutStreamer.getContext().getELFSection(".opd",
@@ -752,15 +944,22 @@ void PPCLinuxAsmPrinter::EmitFunctionEntryLabel() {
bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
- const DataLayout *TD = TM.getDataLayout();
+ const DataLayout *TD = TM.getSubtargetImpl()->getDataLayout();
bool isPPC64 = TD->getPointerSizeInBits() == 64;
PPCTargetStreamer &TS =
static_cast<PPCTargetStreamer &>(*OutStreamer.getTargetStreamer());
- if (isPPC64 && !TOC.empty()) {
- const MCSectionELF *Section = OutStreamer.getContext().getELFSection(".toc",
+ if (!TOC.empty()) {
+ const MCSectionELF *Section;
+
+ if (isPPC64)
+ Section = OutStreamer.getContext().getELFSection(".toc",
+ ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
+ SectionKind::getReadOnly());
+ else
+ Section = OutStreamer.getContext().getELFSection(".got2",
ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
SectionKind::getReadOnly());
OutStreamer.SwitchSection(Section);
@@ -768,8 +967,11 @@ bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
for (MapVector<MCSymbol*, MCSymbol*>::iterator I = TOC.begin(),
E = TOC.end(); I != E; ++I) {
OutStreamer.EmitLabel(I->second);
- MCSymbol *S = OutContext.GetOrCreateSymbol(I->first->getName());
- TS.emitTCEntry(*S);
+ MCSymbol *S = I->first;
+ if (isPPC64)
+ TS.emitTCEntry(*S);
+ else
+ OutStreamer.EmitSymbolValue(S, 4);
}
}
@@ -795,6 +997,68 @@ bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
return AsmPrinter::doFinalization(M);
}
+/// EmitFunctionBodyStart - Emit a global entry point prefix for ELFv2.
+void PPCLinuxAsmPrinter::EmitFunctionBodyStart() {
+ // In the ELFv2 ABI, in functions that use the TOC register, we need to
+ // provide two entry points. The ABI guarantees that when calling the
+ // local entry point, r2 is set up by the caller to contain the TOC base
+ // for this function, and when calling the global entry point, r12 is set
+ // up by the caller to hold the address of the global entry point. We
+ // thus emit a prefix sequence along the following lines:
+ //
+ // func:
+ // # global entry point
+ // addis r2,r12,(.TOC.-func)@ha
+ // addi r2,r2,(.TOC.-func)@l
+ // .localentry func, .-func
+ // # local entry point, followed by function body
+ //
+ // This ensures we have r2 set up correctly while executing the function
+ // body, no matter which entry point is called.
+ if (Subtarget.isELFv2ABI()
+ // Only do all that if the function uses r2 in the first place.
+ && !MF->getRegInfo().use_empty(PPC::X2)) {
+
+ MCSymbol *GlobalEntryLabel = OutContext.CreateTempSymbol();
+ OutStreamer.EmitLabel(GlobalEntryLabel);
+ const MCSymbolRefExpr *GlobalEntryLabelExp =
+ MCSymbolRefExpr::Create(GlobalEntryLabel, OutContext);
+
+ MCSymbol *TOCSymbol = OutContext.GetOrCreateSymbol(StringRef(".TOC."));
+ const MCExpr *TOCDeltaExpr =
+ MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(TOCSymbol, OutContext),
+ GlobalEntryLabelExp, OutContext);
+
+ const MCExpr *TOCDeltaHi =
+ PPCMCExpr::CreateHa(TOCDeltaExpr, false, OutContext);
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS)
+ .addReg(PPC::X2)
+ .addReg(PPC::X12)
+ .addExpr(TOCDeltaHi));
+
+ const MCExpr *TOCDeltaLo =
+ PPCMCExpr::CreateLo(TOCDeltaExpr, false, OutContext);
+ EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDI)
+ .addReg(PPC::X2)
+ .addReg(PPC::X2)
+ .addExpr(TOCDeltaLo));
+
+ MCSymbol *LocalEntryLabel = OutContext.CreateTempSymbol();
+ OutStreamer.EmitLabel(LocalEntryLabel);
+ const MCSymbolRefExpr *LocalEntryLabelExp =
+ MCSymbolRefExpr::Create(LocalEntryLabel, OutContext);
+ const MCExpr *LocalOffsetExp =
+ MCBinaryExpr::CreateSub(LocalEntryLabelExp,
+ GlobalEntryLabelExp, OutContext);
+
+ PPCTargetStreamer *TS =
+ static_cast<PPCTargetStreamer *>(OutStreamer.getTargetStreamer());
+
+ if (TS)
+ TS->emitLocalEntry(CurrentFnSym, LocalOffsetExp);
+ }
+}
+
/// EmitFunctionBodyEnd - Print the traceback table before the .size
/// directive.
///
@@ -886,7 +1150,8 @@ static MCSymbol *GetAnonSym(MCSymbol *Sym, MCContext &Ctx) {
void PPCDarwinAsmPrinter::
EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs) {
- bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
+ bool isPPC64 =
+ TM.getSubtargetImpl()->getDataLayout()->getPointerSizeInBits() == 64;
bool isDarwin = Subtarget.isDarwin();
const TargetLoweringObjectFileMachO &TLOFMacho =
@@ -1022,7 +1287,8 @@ EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs) {
bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
- bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
+ bool isPPC64 =
+ TM.getSubtargetImpl()->getDataLayout()->getPointerSizeInBits() == 64;
// Darwin/PPC always uses mach-o.
const TargetLoweringObjectFileMachO &TLOFMacho =
generated by cgit v1.1 at 2024-05-20 17:07:11 +0000