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-rw-r--r--include/llvm/CodeGen/MachineRelocation.h27
-rw-r--r--lib/ExecutionEngine/JIT/JITEmitter.cpp4
-rw-r--r--lib/Target/Alpha/AlphaCodeEmitter.cpp3
-rw-r--r--lib/Target/PowerPC/PPCCodeEmitter.cpp3
-rw-r--r--lib/Target/X86/X86CodeEmitter.cpp96
5 files changed, 67 insertions, 66 deletions
diff --git a/include/llvm/CodeGen/MachineRelocation.h b/include/llvm/CodeGen/MachineRelocation.h
index fc853d1..ab51270 100644
--- a/include/llvm/CodeGen/MachineRelocation.h
+++ b/include/llvm/CodeGen/MachineRelocation.h
@@ -64,7 +64,7 @@ class MachineRelocation {
unsigned TargetReloType : 6; // The target relocation ID.
AddressType AddrType : 4; // The field of Target to use.
- bool DoesntNeedFnStub : 1; // True if we don't need a fn stub.
+ bool NeedStub : 1; // True if this relocation requires a stub.
bool GOTRelative : 1; // Should this relocation be relative to the GOT?
public:
@@ -79,7 +79,7 @@ public:
///
static MachineRelocation getGV(intptr_t offset, unsigned RelocationType,
GlobalValue *GV, intptr_t cst = 0,
- bool DoesntNeedFunctionStub = 0,
+ bool NeedStub = 0,
bool GOTrelative = 0) {
assert((RelocationType & ~63) == 0 && "Relocation type too large!");
MachineRelocation Result;
@@ -87,7 +87,7 @@ public:
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isGV;
- Result.DoesntNeedFnStub = DoesntNeedFunctionStub;
+ Result.NeedStub = NeedStub;
Result.GOTRelative = GOTrelative;
Result.Target.GV = GV;
return Result;
@@ -103,7 +103,7 @@ public:
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isBB;
- Result.DoesntNeedFnStub = false;
+ Result.NeedStub = false;
Result.GOTRelative = false;
Result.Target.MBB = MBB;
return Result;
@@ -121,7 +121,7 @@ public:
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isExtSym;
- Result.DoesntNeedFnStub = false;
+ Result.NeedStub = false;
Result.GOTRelative = GOTrelative;
Result.Target.ExtSym = ES;
return Result;
@@ -138,7 +138,7 @@ public:
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isConstPool;
- Result.DoesntNeedFnStub = false;
+ Result.NeedStub = false;
Result.GOTRelative = false;
Result.Target.Index = CPI;
return Result;
@@ -155,7 +155,7 @@ public:
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isJumpTable;
- Result.DoesntNeedFnStub = false;
+ Result.NeedStub = false;
Result.GOTRelative = false;
Result.Target.Index = JTI;
return Result;
@@ -223,13 +223,12 @@ public:
return GOTRelative;
}
- /// doesntNeedFunctionStub - This function returns true if the JIT for this
- /// target is capable of directly handling the relocated instruction without
- /// using a stub function. It is always conservatively correct for this flag
- /// to be false, but targets can improve their compilation callback functions
- /// to handle more general cases if they want improved performance.
- bool doesntNeedFunctionStub() const {
- return DoesntNeedFnStub;
+ /// doesntNeedStub - This function returns true if the JIT for this target
+ /// target is capable of directly handling the relocated GlobalValue reference
+ /// without using either a stub function or issuing an extra load to get the
+ /// GV address.
+ bool doesntNeedStub() const {
+ return !NeedStub;
}
/// getGlobalValue - If this is a global value reference, return the
diff --git a/lib/ExecutionEngine/JIT/JITEmitter.cpp b/lib/ExecutionEngine/JIT/JITEmitter.cpp
index af17405..beeca3b 100644
--- a/lib/ExecutionEngine/JIT/JITEmitter.cpp
+++ b/lib/ExecutionEngine/JIT/JITEmitter.cpp
@@ -444,12 +444,12 @@ bool JITEmitter::finishFunction(MachineFunction &F) {
ResultPtr = TheJIT->getPointerToNamedFunction(MR.getString());
// If the target REALLY wants a stub for this function, emit it now.
- if (!MR.doesntNeedFunctionStub())
+ if (!MR.doesntNeedStub())
ResultPtr = Resolver.getExternalFunctionStub(ResultPtr);
} else if (MR.isGlobalValue()) {
ResultPtr = getPointerToGlobal(MR.getGlobalValue(),
BufferBegin+MR.getMachineCodeOffset(),
- MR.doesntNeedFunctionStub());
+ MR.doesntNeedStub());
} else if (MR.isBasicBlock()) {
ResultPtr = (void*)getMachineBasicBlockAddress(MR.getBasicBlock());
} else if (MR.isConstantPoolIndex()) {
diff --git a/lib/Target/Alpha/AlphaCodeEmitter.cpp b/lib/Target/Alpha/AlphaCodeEmitter.cpp
index 155c863..93ef28c 100644
--- a/lib/Target/Alpha/AlphaCodeEmitter.cpp
+++ b/lib/Target/Alpha/AlphaCodeEmitter.cpp
@@ -196,7 +196,8 @@ int AlphaCodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) {
if (MO.isGlobalAddress())
MCE.addRelocation(MachineRelocation::getGV(MCE.getCurrentPCOffset(),
Reloc, MO.getGlobal(), Offset,
- false, useGOT));
+ isa<Function>(MO.getGlobal()),
+ useGOT));
else if (MO.isExternalSymbol())
MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
Reloc, MO.getSymbolName(),
diff --git a/lib/Target/PowerPC/PPCCodeEmitter.cpp b/lib/Target/PowerPC/PPCCodeEmitter.cpp
index 798eb9f..b96d555 100644
--- a/lib/Target/PowerPC/PPCCodeEmitter.cpp
+++ b/lib/Target/PowerPC/PPCCodeEmitter.cpp
@@ -189,7 +189,8 @@ int PPCCodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) {
MachineRelocation R;
if (MO.isGlobalAddress()) {
R = MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
- MO.getGlobal(), 0);
+ MO.getGlobal(),
+ isa<Function>(MO.getGlobal()), 0);
} else if (MO.isExternalSymbol()) {
R = MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
Reloc, MO.getSymbolName(), 0);
diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp
index 8b8ea0c..14b5762 100644
--- a/lib/Target/X86/X86CodeEmitter.cpp
+++ b/lib/Target/X86/X86CodeEmitter.cpp
@@ -40,17 +40,20 @@ namespace {
intptr_t PICBase;
bool Is64BitMode;
bool IsPIC;
+ bool IsStatic;
public:
static char ID;
explicit Emitter(TargetMachine &tm, MachineCodeEmitter &mce)
: MachineFunctionPass((intptr_t)&ID), II(0), TD(0), TM(tm),
MCE(mce), PICBase(0), Is64BitMode(false),
- IsPIC(TM.getRelocationModel() == Reloc::PIC_) {}
+ IsPIC(TM.getRelocationModel() == Reloc::PIC_),
+ IsStatic(TM.getRelocationModel() == Reloc::Static) {}
Emitter(TargetMachine &tm, MachineCodeEmitter &mce,
const X86InstrInfo &ii, const TargetData &td, bool is64)
: MachineFunctionPass((intptr_t)&ID), II(&ii), TD(&td), TM(tm),
MCE(mce), PICBase(0), Is64BitMode(is64),
- IsPIC(TM.getRelocationModel() == Reloc::PIC_) {}
+ IsPIC(TM.getRelocationModel() == Reloc::PIC_),
+ IsStatic(TM.getRelocationModel() == Reloc::Static) {}
bool runOnMachineFunction(MachineFunction &MF);
@@ -64,13 +67,12 @@ namespace {
void emitPCRelativeBlockAddress(MachineBasicBlock *MBB);
void emitGlobalAddress(GlobalValue *GV, unsigned Reloc,
int Disp = 0, intptr_t PCAdj = 0,
- bool DoesntNeedStub = false, bool isPIC = false);
- void emitExternalSymbolAddress(const char *ES, unsigned Reloc,
- bool isPIC = false);
+ bool NeedStub = false);
+ void emitExternalSymbolAddress(const char *ES, unsigned Reloc);
void emitConstPoolAddress(unsigned CPI, unsigned Reloc, int Disp = 0,
- intptr_t PCAdj = 0, bool isPIC = false);
+ intptr_t PCAdj = 0);
void emitJumpTableAddress(unsigned JTI, unsigned Reloc,
- intptr_t PCAdj = 0, bool isPIC = false);
+ intptr_t PCAdj = 0);
void emitDisplacementField(const MachineOperand *RelocOp, int DispVal,
intptr_t PCAdj = 0);
@@ -137,12 +139,11 @@ void Emitter::emitPCRelativeBlockAddress(MachineBasicBlock *MBB) {
///
void Emitter::emitGlobalAddress(GlobalValue *GV, unsigned Reloc,
int Disp /* = 0 */, intptr_t PCAdj /* = 0 */,
- bool DoesntNeedStub /* = false */,
- bool isPIC /* = false */) {
- if (isPIC)
+ bool NeedStub /* = false */) {
+ if (Reloc == X86::reloc_picrel_word)
PCAdj += PICBase;
MCE.addRelocation(MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
- GV, PCAdj, DoesntNeedStub));
+ GV, PCAdj, NeedStub));
if (Reloc == X86::reloc_absolute_dword)
MCE.emitWordLE(0);
MCE.emitWordLE(Disp); // The relocated value will be added to the displacement
@@ -151,9 +152,8 @@ void Emitter::emitGlobalAddress(GlobalValue *GV, unsigned Reloc,
/// emitExternalSymbolAddress - Arrange for the address of an external symbol to
/// be emitted to the current location in the function, and allow it to be PC
/// relative.
-void Emitter::emitExternalSymbolAddress(const char *ES, unsigned Reloc,
- bool isPIC /* = false */) {
- intptr_t PCAdj = isPIC ? PICBase : 0;
+void Emitter::emitExternalSymbolAddress(const char *ES, unsigned Reloc) {
+ intptr_t PCAdj = (Reloc == X86::reloc_picrel_word) ? PICBase : 0;
MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
Reloc, ES, PCAdj));
if (Reloc == X86::reloc_absolute_dword)
@@ -166,9 +166,8 @@ void Emitter::emitExternalSymbolAddress(const char *ES, unsigned Reloc,
/// relative.
void Emitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc,
int Disp /* = 0 */,
- intptr_t PCAdj /* = 0 */,
- bool isPIC /* = false */) {
- if (isPIC)
+ intptr_t PCAdj /* = 0 */) {
+ if (Reloc == X86::reloc_picrel_word)
PCAdj += PICBase;
MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
Reloc, CPI, PCAdj));
@@ -181,9 +180,8 @@ void Emitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc,
/// be emitted to the current location in the function, and allow it to be PC
/// relative.
void Emitter::emitJumpTableAddress(unsigned JTI, unsigned Reloc,
- intptr_t PCAdj /* = 0 */,
- bool isPIC /* = false */) {
- if (isPIC)
+ intptr_t PCAdj /* = 0 */) {
+ if (Reloc == X86::reloc_picrel_word)
PCAdj += PICBase;
MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
Reloc, JTI, PCAdj));
@@ -241,17 +239,18 @@ void Emitter::emitDisplacementField(const MachineOperand *RelocOp,
// But it's probably not beneficial.
// 89 05 00 00 00 00 mov %eax,0(%rip) # PC-relative
// 89 04 25 00 00 00 00 mov %eax,0x0 # Absolute
- unsigned rt= Is64BitMode ? X86::reloc_pcrel_word
+ unsigned rt = Is64BitMode ? X86::reloc_pcrel_word
: (IsPIC ? X86::reloc_picrel_word : X86::reloc_absolute_word);
+ bool NeedStub = !IsStatic || isa<Function>(RelocOp->getGlobal());
emitGlobalAddress(RelocOp->getGlobal(), rt, RelocOp->getOffset(),
- PCAdj, false, IsPIC);
+ PCAdj, NeedStub);
} else if (RelocOp->isConstantPoolIndex()) {
unsigned rt = Is64BitMode ? X86::reloc_pcrel_word : X86::reloc_picrel_word;
emitConstPoolAddress(RelocOp->getIndex(), rt,
- RelocOp->getOffset(), PCAdj, IsPIC);
+ RelocOp->getOffset(), PCAdj);
} else if (RelocOp->isJumpTableIndex()) {
unsigned rt = Is64BitMode ? X86::reloc_pcrel_word : X86::reloc_picrel_word;
- emitJumpTableAddress(RelocOp->getIndex(), rt, PCAdj, IsPIC);
+ emitJumpTableAddress(RelocOp->getIndex(), rt, PCAdj);
} else {
assert(0 && "Unknown value to relocate!");
}
@@ -602,14 +601,12 @@ void Emitter::emitInstruction(const MachineInstr &MI) {
if (MO.isMachineBasicBlock()) {
emitPCRelativeBlockAddress(MO.getMBB());
} else if (MO.isGlobalAddress()) {
- bool NeedStub = Is64BitMode ||
- Opcode == X86::TAILJMPd ||
- Opcode == X86::TAILJMPr || Opcode == X86::TAILJMPm;
+ bool NeedStub = !IsStatic ||
+ (Is64BitMode && TM.getCodeModel() == CodeModel::Large);
emitGlobalAddress(MO.getGlobal(), X86::reloc_pcrel_word,
- 0, 0, !NeedStub, false);
+ 0, 0, NeedStub);
} else if (MO.isExternalSymbol()) {
- emitExternalSymbolAddress(MO.getSymbolName(),
- X86::reloc_pcrel_word, false);
+ emitExternalSymbolAddress(MO.getSymbolName(), X86::reloc_pcrel_word);
} else if (MO.isImmediate()) {
emitConstant(MO.getImm(), sizeOfImm(Desc));
} else {
@@ -636,14 +633,15 @@ void Emitter::emitInstruction(const MachineInstr &MI) {
: (IsPIC ? X86::reloc_picrel_word : X86::reloc_absolute_word);
if (Opcode == X86::MOV64ri)
rt = X86::reloc_absolute_dword; // FIXME: add X86II flag?
- if (MO1.isGlobalAddress())
- emitGlobalAddress(MO1.getGlobal(), rt, MO1.getOffset(), false, IsPIC);
- else if (MO1.isExternalSymbol())
- emitExternalSymbolAddress(MO1.getSymbolName(), rt, IsPIC);
+ if (MO1.isGlobalAddress()) {
+ bool NeedStub = !IsStatic || isa<Function>(MO1.getGlobal());
+ emitGlobalAddress(MO1.getGlobal(), rt, MO1.getOffset(), 0, NeedStub);
+ } else if (MO1.isExternalSymbol())
+ emitExternalSymbolAddress(MO1.getSymbolName(), rt);
else if (MO1.isConstantPoolIndex())
- emitConstPoolAddress(MO1.getIndex(), rt, IsPIC);
+ emitConstPoolAddress(MO1.getIndex(), rt);
else if (MO1.isJumpTableIndex())
- emitJumpTableAddress(MO1.getIndex(), rt, IsPIC);
+ emitJumpTableAddress(MO1.getIndex(), rt);
}
}
break;
@@ -705,14 +703,15 @@ void Emitter::emitInstruction(const MachineInstr &MI) {
: (IsPIC ? X86::reloc_picrel_word : X86::reloc_absolute_word);
if (Opcode == X86::MOV64ri32)
rt = X86::reloc_absolute_word; // FIXME: add X86II flag?
- if (MO1.isGlobalAddress())
- emitGlobalAddress(MO1.getGlobal(), rt, MO1.getOffset(), false, IsPIC);
- else if (MO1.isExternalSymbol())
- emitExternalSymbolAddress(MO1.getSymbolName(), rt, IsPIC);
+ if (MO1.isGlobalAddress()) {
+ bool NeedStub = !IsStatic || isa<Function>(MO1.getGlobal());
+ emitGlobalAddress(MO1.getGlobal(), rt, MO1.getOffset(), 0, NeedStub);
+ } else if (MO1.isExternalSymbol())
+ emitExternalSymbolAddress(MO1.getSymbolName(), rt);
else if (MO1.isConstantPoolIndex())
- emitConstPoolAddress(MO1.getIndex(), rt, IsPIC);
+ emitConstPoolAddress(MO1.getIndex(), rt);
else if (MO1.isJumpTableIndex())
- emitJumpTableAddress(MO1.getIndex(), rt, IsPIC);
+ emitJumpTableAddress(MO1.getIndex(), rt);
}
}
break;
@@ -739,14 +738,15 @@ void Emitter::emitInstruction(const MachineInstr &MI) {
: (IsPIC ? X86::reloc_picrel_word : X86::reloc_absolute_word);
if (Opcode == X86::MOV64mi32)
rt = X86::reloc_absolute_word; // FIXME: add X86II flag?
- if (MO.isGlobalAddress())
- emitGlobalAddress(MO.getGlobal(), rt, MO.getOffset(), false, IsPIC);
- else if (MO.isExternalSymbol())
- emitExternalSymbolAddress(MO.getSymbolName(), rt, IsPIC);
+ if (MO.isGlobalAddress()) {
+ bool NeedStub = !IsStatic || isa<Function>(MO.getGlobal());
+ emitGlobalAddress(MO.getGlobal(), rt, MO.getOffset(), 0, NeedStub);
+ } else if (MO.isExternalSymbol())
+ emitExternalSymbolAddress(MO.getSymbolName(), rt);
else if (MO.isConstantPoolIndex())
- emitConstPoolAddress(MO.getIndex(), rt, IsPIC);
+ emitConstPoolAddress(MO.getIndex(), rt);
else if (MO.isJumpTableIndex())
- emitJumpTableAddress(MO.getIndex(), rt, IsPIC);
+ emitJumpTableAddress(MO.getIndex(), rt);
}
}
break;
generated by cgit v1.1 at 2025-01-28 03:02:40 +0000