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freebsd-dev/contrib/llvm/patches/patch-22-llvm-r221791-ppc-small-pic.diff
Dimitry Andric 9cac79b378 Upgrade our copy of clang and llvm to 3.5.1 release. This is a bugfix 
only release, no new features have been added.

Please note that this version requires C++11 support to build; see
UPDATING for more information.

Release notes for llvm and clang can be found here:
<http://llvm.org/releases/3.5.1/docs/ReleaseNotes.html>
<http://llvm.org/releases/3.5.1/tools/clang/docs/ReleaseNotes.html>

MFC after:	1 month
X-MFC-With:	276479
2015-01-18 14:14:47 +00:00

721 lines
29 KiB
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Pull in r214284 from upstream llvm trunk (by Hal Finkel):
[PowerPC] Add JMP_SLOT relocation definitions
This will be required by upcoming patches for LLDB support.
Patch by Justin Hibbits!
Pull in r221510 from upstream llvm trunk (by Justin Hibbits):
Add Position-independent Code model Module API.
Summary:
This makes PIC levels a Module flag attribute, which can be queried by the
backend. The flag is named `PIC Level`, and can have a value of:
0 - Backend-default
1 - Small-model (-fpic)
2 - Large-model (-fPIC)
These match the `-pic-level' command line argument for clang, and the value of the
preprocessor macro `__PIC__'.
Test Plan:
New flags tests specific for the 'PIC Level' module flag.
Tests to be added as part of a future commit for PowerPC, which will use this new API.
Reviewers: rafael, echristo
Reviewed By: rafael, echristo
Subscribers: rafael, llvm-commits
Differential Revision: http://reviews.llvm.org/D5882
Pull in r221791 from upstream llvm trunk (by Justin Hibbits):
Add support for small-model PIC for PowerPC.
Summary:
Large-model was added first. With the addition of support for multiple PIC
models in LLVM, now add small-model PIC for 32-bit PowerPC, SysV4 ABI. This
generates more optimal code, for shared libraries with less than about 16380
data objects.
Test Plan: Test cases added or updated
Reviewers: joerg, hfinkel
Reviewed By: hfinkel
Subscribers: jholewinski, mcrosier, emaste, llvm-commits
Differential Revision: http://reviews.llvm.org/D5399
Pull in r221792 from upstream llvm trunk (by Justin Hibbits):
Fix thet tests.
I seem to have missed the update I made for changing 'flag_pic' to "PIC Level".
Mea culpa.
Pull in r221793 from upstream llvm trunk (by Justin Hibbits):
Revert part of the PIC tests (TLS part)
This change actually wasn't warranted for -O0, and the new changes prove it and
break the build.
Together, these changes implement small-model PIC support for PowerPC.
Thanks to Justin Hibbits and Roman Divacky for their assistance in
getting this working.
Introduced here: http://svnweb.freebsd.org/changeset/base/276211
Index: include/llvm/IR/Module.h
===================================================================
--- include/llvm/IR/Module.h
+++ include/llvm/IR/Module.h
@@ -23,6 +23,7 @@
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Metadata.h"
#include "llvm/Support/CBindingWrapping.h"
+#include "llvm/Support/CodeGen.h"
#include "llvm/Support/DataTypes.h"
#include <system_error>
@@ -620,6 +621,15 @@ class Module {
unsigned getDwarfVersion() const;
/// @}
+/// @name Utility functions for querying and setting PIC level
+/// @{
+
+ /// \brief Returns the PIC level (small or large model)
+ PICLevel::Level getPICLevel() const;
+
+ /// \brief Set the PIC level (small or large model)
+ void setPICLevel(PICLevel::Level PL);
+/// @}
};
/// An raw_ostream inserter for modules.
Index: include/llvm/MC/MCExpr.h
===================================================================
--- include/llvm/MC/MCExpr.h
+++ include/llvm/MC/MCExpr.h
@@ -238,6 +238,7 @@ class MCSymbolRefExpr : public MCExpr {
VK_PPC_GOT_TLSLD_HI, // symbol@got@tlsld@h
VK_PPC_GOT_TLSLD_HA, // symbol@got@tlsld@ha
VK_PPC_TLSLD, // symbol@tlsld
+ VK_PPC_LOCAL, // symbol@local
VK_Mips_GPREL,
VK_Mips_GOT_CALL,
Index: include/llvm/Support/CodeGen.h
===================================================================
--- include/llvm/Support/CodeGen.h
+++ include/llvm/Support/CodeGen.h
@@ -30,6 +30,10 @@ namespace llvm {
enum Model { Default, JITDefault, Small, Kernel, Medium, Large };
}
+ namespace PICLevel {
+ enum Level { Default=0, Small=1, Large=2 };
+ }
+
// TLS models.
namespace TLSModel {
enum Model {
Index: include/llvm/Support/ELF.h
===================================================================
--- include/llvm/Support/ELF.h
+++ include/llvm/Support/ELF.h
@@ -459,6 +459,8 @@ enum {
R_PPC_GOT16_HI = 16,
R_PPC_GOT16_HA = 17,
R_PPC_PLTREL24 = 18,
+ R_PPC_JMP_SLOT = 21,
+ R_PPC_LOCAL24PC = 23,
R_PPC_REL32 = 26,
R_PPC_TLS = 67,
R_PPC_DTPMOD32 = 68,
@@ -547,6 +549,7 @@ enum {
R_PPC64_GOT16_LO = 15,
R_PPC64_GOT16_HI = 16,
R_PPC64_GOT16_HA = 17,
+ R_PPC64_JMP_SLOT = 21,
R_PPC64_REL32 = 26,
R_PPC64_ADDR64 = 38,
R_PPC64_ADDR16_HIGHER = 39,
Index: lib/IR/Module.cpp
===================================================================
--- lib/IR/Module.cpp
+++ lib/IR/Module.cpp
@@ -461,3 +461,16 @@ Comdat *Module::getOrInsertComdat(StringRef Name)
Entry.second.Name = &Entry;
return &Entry.second;
}
+
+PICLevel::Level Module::getPICLevel() const {
+ Value *Val = getModuleFlag("PIC Level");
+
+ if (Val == NULL)
+ return PICLevel::Default;
+
+ return static_cast<PICLevel::Level>(cast<ConstantInt>(Val)->getZExtValue());
+}
+
+void Module::setPICLevel(PICLevel::Level PL) {
+ addModuleFlag(ModFlagBehavior::Error, "PIC Level", PL);
+}
Index: lib/MC/MCExpr.cpp
===================================================================
--- lib/MC/MCExpr.cpp
+++ lib/MC/MCExpr.cpp
@@ -247,6 +247,7 @@ StringRef MCSymbolRefExpr::getVariantKindName(Vari
case VK_PPC_GOT_TLSLD_HI: return "got@tlsld@h";
case VK_PPC_GOT_TLSLD_HA: return "got@tlsld@ha";
case VK_PPC_TLSLD: return "tlsld";
+ case VK_PPC_LOCAL: return "local";
case VK_Mips_GPREL: return "GPREL";
case VK_Mips_GOT_CALL: return "GOT_CALL";
case VK_Mips_GOT16: return "GOT16";
Index: lib/Object/ELF.cpp
===================================================================
--- lib/Object/ELF.cpp
+++ lib/Object/ELF.cpp
@@ -531,6 +531,8 @@ StringRef getELFRelocationTypeName(uint32_t Machin
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC_GOT16_HI);
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC_GOT16_HA);
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC_PLTREL24);
+ LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC_JMP_SLOT);
+ LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC_LOCAL24PC);
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC_REL32);
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC_TLS);
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC_DTPMOD32);
@@ -590,6 +592,7 @@ StringRef getELFRelocationTypeName(uint32_t Machin
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC64_GOT16_LO);
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC64_GOT16_HI);
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC64_GOT16_HA);
+ LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC64_JMP_SLOT);
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC64_REL32);
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC64_ADDR64);
LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_PPC64_ADDR16_HIGHER);
Index: lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp
===================================================================
--- lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp
+++ lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp
@@ -95,6 +95,9 @@ unsigned PPCELFObjectWriter::getRelocTypeInner(con
case MCSymbolRefExpr::VK_PLT:
Type = ELF::R_PPC_PLTREL24;
break;
+ case MCSymbolRefExpr::VK_PPC_LOCAL:
+ Type = ELF::R_PPC_LOCAL24PC;
+ break;
}
break;
case PPC::fixup_ppc_brcond14:
Index: lib/Target/PowerPC/PPCAsmPrinter.cpp
===================================================================
--- lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -311,6 +311,9 @@ MCSymbol *PPCAsmPrinter::lookUpOrCreateTOCEntry(MC
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()) {
@@ -317,6 +320,26 @@ void PPCAsmPrinter::EmitInstruction(const MachineI
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
@@ -335,10 +358,14 @@ void PPCAsmPrinter::EmitInstruction(const MachineI
OutStreamer.EmitLabel(PICBase);
return;
}
- case PPC::GetGBRO: {
+ 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, Subtarget.isDarwin());
- MCSymbol *PICOffset = MF->getInfo<PPCFunctionInfo>()->getPICOffsetSymbol();
+ 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);
@@ -346,26 +373,26 @@ void PPCAsmPrinter::EmitInstruction(const MachineI
MCSymbolRefExpr::Create(MF->getPICBaseSymbol(),
MCSymbolRefExpr::VK_None,
OutContext);
- const MCOperand MO = TmpInst.getOperand(1);
- TmpInst.getOperand(1) = MCOperand::CreateExpr(MCBinaryExpr::CreateSub(Exp,
- PB,
- OutContext));
- TmpInst.addOperand(MO);
+ 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);
- return;
- }
- case PPC::UpdateGBR: {
- // Update the GOT Base Register to point to the GOT. It may be possible to
- // merge this with the PPC::GetGBRO, doing it all in one step.
- LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
+
TmpInst.setOpcode(PPC::ADD4);
- TmpInst.addOperand(TmpInst.getOperand(0));
+ TmpInst.getOperand(0) = PICR;
+ TmpInst.getOperand(1) = TR;
+ TmpInst.getOperand(2) = PICR;
EmitToStreamer(OutStreamer, TmpInst);
return;
}
case PPC::LWZtoc: {
- // Transform %X3 = LWZtoc <ga:@min1>, %X2
- LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
+ // 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.
@@ -384,16 +411,23 @@ void PPCAsmPrinter::EmitInstruction(const MachineI
else if (MO.isBlockAddress())
MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
- MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
+ 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(".L.TOC.")),
- OutContext);
- Exp = MCBinaryExpr::CreateSub(Exp, PB, OutContext);
- TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
+ 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;
}
@@ -402,7 +436,7 @@ void PPCAsmPrinter::EmitInstruction(const MachineI
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.
@@ -433,7 +467,7 @@ void PPCAsmPrinter::EmitInstruction(const MachineI
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
@@ -479,7 +513,7 @@ void PPCAsmPrinter::EmitInstruction(const MachineI
}
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
@@ -521,7 +555,7 @@ void PPCAsmPrinter::EmitInstruction(const MachineI
}
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
@@ -572,7 +606,7 @@ void PPCAsmPrinter::EmitInstruction(const MachineI
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);
@@ -796,7 +830,7 @@ void PPCAsmPrinter::EmitInstruction(const MachineI
}
}
- LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
EmitToStreamer(OutStreamer, TmpInst);
}
@@ -812,16 +846,14 @@ void PPCLinuxAsmPrinter::EmitStartOfAsmFile(Module
if (Subtarget.isPPC64() || TM.getRelocationModel() != Reloc::PIC_)
return AsmPrinter::EmitStartOfAsmFile(M);
- // FIXME: The use of .got2 assumes large GOT model (-fPIC), which is not
- // optimal for some cases. We should consider supporting small model (-fpic)
- // as well in the future.
- assert(TM.getCodeModel() != CodeModel::Small &&
- "Small code model PIC is currently unsupported.");
+ 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(".L.TOC."));
+ MCSymbol *TOCSym = OutContext.GetOrCreateSymbol(Twine(".LTOC"));
MCSymbol *CurrentPos = OutContext.CreateTempSymbol();
OutStreamer.EmitLabel(CurrentPos);
@@ -840,7 +872,9 @@ void PPCLinuxAsmPrinter::EmitStartOfAsmFile(Module
void PPCLinuxAsmPrinter::EmitFunctionEntryLabel() {
// linux/ppc32 - Normal entry label.
- if (!Subtarget.isPPC64() && TM.getRelocationModel() != Reloc::PIC_)
+ if (!Subtarget.isPPC64() &&
+ (TM.getRelocationModel() != Reloc::PIC_ ||
+ MF->getFunction()->getParent()->getPICLevel() == PICLevel::Small))
return AsmPrinter::EmitFunctionEntryLabel();
if (!Subtarget.isPPC64()) {
@@ -852,7 +886,7 @@ void PPCLinuxAsmPrinter::EmitFunctionEntryLabel()
const MCExpr *OffsExpr =
MCBinaryExpr::CreateSub(
- MCSymbolRefExpr::Create(OutContext.GetOrCreateSymbol(Twine(".L.TOC.")),
+ MCSymbolRefExpr::Create(OutContext.GetOrCreateSymbol(Twine(".LTOC")),
OutContext),
MCSymbolRefExpr::Create(PICBase, OutContext),
OutContext);
Index: lib/Target/PowerPC/PPCISelDAGToDAG.cpp
===================================================================
--- lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+++ lib/Target/PowerPC/PPCISelDAGToDAG.cpp
@@ -27,6 +27,7 @@
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Intrinsics.h"
+#include "llvm/IR/Module.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
@@ -283,23 +284,29 @@ SDNode *PPCDAGToDAGISel::getGlobalBaseReg() {
// Insert the set of GlobalBaseReg into the first MBB of the function
MachineBasicBlock &FirstMBB = MF->front();
MachineBasicBlock::iterator MBBI = FirstMBB.begin();
+ const Module *M = MF->getFunction()->getParent();
DebugLoc dl;
if (PPCLowering->getPointerTy() == MVT::i32) {
- if (PPCSubTarget->isTargetELF())
+ if (PPCSubTarget->isTargetELF()) {
GlobalBaseReg = PPC::R30;
- else
+ if (M->getPICLevel() == PICLevel::Small) {
+ BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MoveGOTtoLR));
+ BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MFLR), GlobalBaseReg);
+ } else {
+ BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MovePCtoLR));
+ BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MFLR), GlobalBaseReg);
+ unsigned TempReg = RegInfo->createVirtualRegister(&PPC::GPRCRegClass);
+ BuildMI(FirstMBB, MBBI, dl,
+ TII.get(PPC::UpdateGBR)).addReg(GlobalBaseReg)
+ .addReg(TempReg, RegState::Define).addReg(GlobalBaseReg);
+ MF->getInfo<PPCFunctionInfo>()->setUsesPICBase(true);
+ }
+ } else {
GlobalBaseReg =
RegInfo->createVirtualRegister(&PPC::GPRC_NOR0RegClass);
- BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MovePCtoLR));
- BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MFLR), GlobalBaseReg);
- if (PPCSubTarget->isTargetELF()) {
- unsigned TempReg = RegInfo->createVirtualRegister(&PPC::GPRCRegClass);
- BuildMI(FirstMBB, MBBI, dl,
- TII.get(PPC::GetGBRO), TempReg).addReg(GlobalBaseReg);
- BuildMI(FirstMBB, MBBI, dl,
- TII.get(PPC::UpdateGBR)).addReg(GlobalBaseReg).addReg(TempReg);
- MF->getInfo<PPCFunctionInfo>()->setUsesPICBase(true);
+ BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MovePCtoLR));
+ BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MFLR), GlobalBaseReg);
}
} else {
GlobalBaseReg = RegInfo->createVirtualRegister(&PPC::G8RC_NOX0RegClass);
@@ -1439,13 +1446,13 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) {
return CurDAG->SelectNodeTo(N, Reg, MVT::Other, Chain);
}
case PPCISD::TOC_ENTRY: {
+ assert ((PPCSubTarget->isPPC64() || PPCSubTarget->isSVR4ABI()) &&
+ "Only supported for 64-bit ABI and 32-bit SVR4");
if (PPCSubTarget->isSVR4ABI() && !PPCSubTarget->isPPC64()) {
SDValue GA = N->getOperand(0);
return CurDAG->getMachineNode(PPC::LWZtoc, dl, MVT::i32, GA,
N->getOperand(1));
}
- assert (PPCSubTarget->isPPC64() &&
- "Only supported for 64-bit ABI and 32-bit SVR4");
// For medium and large code model, we generate two instructions as
// described below. Otherwise we allow SelectCodeCommon to handle this,
Index: lib/Target/PowerPC/PPCISelLowering.cpp
===================================================================
--- lib/Target/PowerPC/PPCISelLowering.cpp
+++ lib/Target/PowerPC/PPCISelLowering.cpp
@@ -1682,6 +1682,8 @@ SDValue PPCTargetLowering::LowerGlobalTLSAddress(S
const GlobalValue *GV = GA->getGlobal();
EVT PtrVT = getPointerTy();
bool is64bit = Subtarget.isPPC64();
+ const Module *M = DAG.getMachineFunction().getFunction()->getParent();
+ PICLevel::Level picLevel = M->getPICLevel();
TLSModel::Model Model = getTargetMachine().getTLSModel(GV);
@@ -1721,7 +1723,10 @@ SDValue PPCTargetLowering::LowerGlobalTLSAddress(S
GOTPtr = DAG.getNode(PPCISD::ADDIS_TLSGD_HA, dl, PtrVT,
GOTReg, TGA);
} else {
- GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
+ if (picLevel == PICLevel::Small)
+ GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT);
+ else
+ GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
}
SDValue GOTEntry = DAG.getNode(PPCISD::ADDI_TLSGD_L, dl, PtrVT,
GOTPtr, TGA);
@@ -1738,7 +1743,10 @@ SDValue PPCTargetLowering::LowerGlobalTLSAddress(S
GOTPtr = DAG.getNode(PPCISD::ADDIS_TLSLD_HA, dl, PtrVT,
GOTReg, TGA);
} else {
- GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
+ if (picLevel == PICLevel::Small)
+ GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT);
+ else
+ GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
}
SDValue GOTEntry = DAG.getNode(PPCISD::ADDI_TLSLD_L, dl, PtrVT,
GOTPtr, TGA);
Index: lib/Target/PowerPC/PPCInstrInfo.td
===================================================================
--- lib/Target/PowerPC/PPCInstrInfo.td
+++ lib/Target/PowerPC/PPCInstrInfo.td
@@ -980,6 +980,9 @@ let isTerminator = 1, isBarrier = 1, PPC970_Unit =
let Defs = [LR] in
def MovePCtoLR : Pseudo<(outs), (ins), "#MovePCtoLR", []>,
PPC970_Unit_BRU;
+let Defs = [LR] in
+ def MoveGOTtoLR : Pseudo<(outs), (ins), "#MoveGOTtoLR", []>,
+ PPC970_Unit_BRU;
let isBranch = 1, isTerminator = 1, hasCtrlDep = 1, PPC970_Unit = 7 in {
let isBarrier = 1 in {
@@ -2442,15 +2445,13 @@ def ADDISdtprelHA32 : Pseudo<(outs gprc:$rD), (ins
tglobaltlsaddr:$disp))]>;
// Support for Position-independent code
-def LWZtoc: Pseudo<(outs gprc:$rD), (ins tocentry32:$disp, gprc:$reg),
- "#LWZtoc",
- [(set i32:$rD,
- (PPCtoc_entry tglobaladdr:$disp, i32:$reg))]>;
+def LWZtoc : Pseudo<(outs gprc:$rD), (ins tocentry32:$disp, gprc:$reg),
+ "#LWZtoc",
+ [(set i32:$rD,
+ (PPCtoc_entry tglobaladdr:$disp, i32:$reg))]>;
// Get Global (GOT) Base Register offset, from the word immediately preceding
// the function label.
-def GetGBRO: Pseudo<(outs gprc:$rT), (ins gprc:$rI), "#GetGBRO", []>;
-// Update the Global(GOT) Base Register with the above offset.
-def UpdateGBR: Pseudo<(outs gprc:$rT), (ins gprc:$rI), "#UpdateGBR", []>;
+def UpdateGBR : Pseudo<(outs gprc:$rD, gprc:$rT), (ins gprc:$rI), "#UpdateGBR", []>;
// Standard shifts. These are represented separately from the real shifts above
Index: test/CodeGen/PowerPC/ppc32-pic-large.ll
===================================================================
--- test/CodeGen/PowerPC/ppc32-pic-large.ll
+++ test/CodeGen/PowerPC/ppc32-pic-large.ll
@@ -0,0 +1,23 @@
+; RUN: llc < %s -mtriple=powerpc-unknown-linux-gnu -relocation-model=pic | FileCheck -check-prefix=LARGE-BSS %s
+@bar = common global i32 0, align 4
+
+define i32 @foo() {
+entry:
+ %0 = load i32* @bar, align 4
+ ret i32 %0
+}
+
+!llvm.module.flags = !{!0}
+!0 = metadata !{i32 1, metadata !"PIC Level", i32 2}
+; LARGE-BSS: [[POFF:\.L[0-9]+\$poff]]:
+; LARGE-BSS-NEXT: .long .LTOC-[[PB:\.L[0-9]+\$pb]]
+; LARGE-BSS-NEXT: foo:
+; LARGE-BSS: bl [[PB]]
+; LARGE-BSS-NEXT: [[PB]]:
+; LARGE-BSS: mflr 30
+; LARGE-BSS: lwz [[REG:[0-9]+]], [[POFF]]-[[PB]](30)
+; LARGE-BSS-NEXT: add 30, [[REG]], 30
+; LARGE-BSS: lwz [[VREG:[0-9]+]], [[VREF:\.LC[0-9]+]]-.LTOC(30)
+; LARGE-BSS: lwz {{[0-9]+}}, 0([[VREG]])
+; LARGE-BSS: [[VREF]]:
+; LARGE-BSS-NEXT: .long bar
Index: test/CodeGen/PowerPC/ppc32-pic.ll
===================================================================
--- test/CodeGen/PowerPC/ppc32-pic.ll
+++ test/CodeGen/PowerPC/ppc32-pic.ll
@@ -1,21 +1,16 @@
-; RUN: llc < %s -mtriple=powerpc-unknown-linux-gnu -relocation-model=pic | FileCheck %s
-@foobar = common global i32 0, align 4
+; RUN: llc < %s -mtriple=powerpc-unknown-linux-gnu -relocation-model=pic | FileCheck -check-prefix=SMALL-BSS %s
+@bar = common global i32 0, align 4
define i32 @foo() {
entry:
- %0 = load i32* @foobar, align 4
+ %0 = load i32* @bar, align 4
ret i32 %0
}
-; CHECK: [[POFF:\.L[0-9]+\$poff]]:
-; CHECK-NEXT: .long .L.TOC.-[[PB:\.L[0-9]+\$pb]]
-; CHECK-NEXT: foo:
-; CHECK: bl [[PB]]
-; CHECK-NEXT: [[PB]]:
-; CHECK: mflr 30
-; CHECK: lwz [[REG:[0-9]+]], [[POFF]]-[[PB]](30)
-; CHECK-NEXT: add 30, [[REG]], 30
-; CHECK: lwz [[VREG:[0-9]+]], [[VREF:\.LC[0-9]+]]-.L.TOC.(30)
-; CHECK: lwz {{[0-9]+}}, 0([[VREG]])
-; CHECK: [[VREF]]:
-; CHECK-NEXT: .long foobar
+!llvm.module.flags = !{!0}
+!0 = metadata !{i32 1, metadata !"PIC Level", i32 1}
+; SMALL-BSS-LABEL:foo:
+; SMALL-BSS: bl _GLOBAL_OFFSET_TABLE_@local-4
+; SMALL-BSS: mflr 30
+; SMALL-BSS: lwz [[VREG:[0-9]+]], bar@GOT(30)
+; SMALL-BSS: lwz {{[0-9]+}}, 0([[VREG]])
Index: test/CodeGen/PowerPC/sections.ll
===================================================================
--- test/CodeGen/PowerPC/sections.ll
+++ test/CodeGen/PowerPC/sections.ll
@@ -1,12 +1,7 @@
; Test to make sure that bss sections are printed with '.section' directive.
; RUN: llc < %s -mtriple=powerpc-unknown-linux-gnu | FileCheck %s
-; RUN: llc < %s -mtriple=powerpc-unknown-linux-gnu -relocation-model=pic | FileCheck %s -check-prefix=PIC
@A = global i32 0
; CHECK: .section .bss,"aw",@nobits
; CHECK: .globl A
-
-; PIC: .section .got2,"aw",@progbits
-; PIC: .section .bss,"aw",@nobits
-; PIC: .globl A
Index: test/Linker/Inputs/module-flags-pic-1-b.ll
===================================================================
--- test/Linker/Inputs/module-flags-pic-1-b.ll
+++ test/Linker/Inputs/module-flags-pic-1-b.ll
@@ -0,0 +1 @@
+
Property changes on: test/Linker/Inputs/module-flags-pic-1-b.ll
___________________________________________________________________
Added: svn:mime-type
## -0,0 +1 ##
+text/plain
\ No newline at end of property
Index: test/Linker/Inputs/module-flags-pic-2-b.ll
===================================================================
--- test/Linker/Inputs/module-flags-pic-2-b.ll
+++ test/Linker/Inputs/module-flags-pic-2-b.ll
@@ -0,0 +1,3 @@
+!0 = metadata !{ i32 1, metadata !"PIC Level", i32 2 }
+
+!llvm.module.flags = !{!0}
Index: test/Linker/module-flags-pic-1-a.ll
===================================================================
--- test/Linker/module-flags-pic-1-a.ll
+++ test/Linker/module-flags-pic-1-a.ll
@@ -0,0 +1,9 @@
+; RUN: llvm-link %s %p/Inputs/module-flags-pic-1-b.ll -S -o - | FileCheck %s
+
+; test linking modules with specified and default PIC levels
+
+!0 = metadata !{ i32 1, metadata !"PIC Level", i32 1 }
+
+!llvm.module.flags = !{!0}
+; CHECK: !llvm.module.flags = !{!0}
+; CHECK: !0 = metadata !{i32 1, metadata !"PIC Level", i32 1}
Index: test/Linker/module-flags-pic-2-a.ll
===================================================================
--- test/Linker/module-flags-pic-2-a.ll
+++ test/Linker/module-flags-pic-2-a.ll
@@ -0,0 +1,10 @@
+; RUN: not llvm-link %s %p/Inputs/module-flags-pic-2-b.ll -S -o - 2> %t
+; RUN: FileCheck --check-prefix=CHECK-ERRORS < %t %s
+
+; test linking modules with two different PIC levels
+
+!0 = metadata !{ i32 1, metadata !"PIC Level", i32 1 }
+
+!llvm.module.flags = !{!0}
+
+; CHECK-ERRORS: linking module flags 'PIC Level': IDs have conflicting values
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