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Let Darwin linker auto-synthesize stubs and lazy-pointers. This deletes a bunch of nasty code in ARM asm printer.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80404 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-08-28 23:18:09 +00:00
parent dbfcdb9763
commit e4e4ed3b56
9 changed files with 59 additions and 262 deletions
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46
lib/Target/ARM/ARMISelLowering.cpp
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@@ -968,8 +968,8 @@ ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
isLocalARMFunc = !Subtarget->isThumb() && !isExt;
// tBX takes a register source operand.
if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
ARMConstantPoolValue *CPV = new ARMConstantPoolValue(GV, ARMPCLabelIndex,
ARMCP::CPStub, 4);
ARMConstantPoolValue *CPV = new ARMConstantPoolValue(GV,
ARMPCLabelIndex, 4);
SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
Callee = DAG.getLoad(getPointerTy(), dl,
@@ -988,8 +988,7 @@ ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
const char *Sym = S->getSymbol();
if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
ARMConstantPoolValue *CPV = new ARMConstantPoolValue(*DAG.getContext(),
Sym, ARMPCLabelIndex,
ARMCP::CPStub, 4);
Sym, ARMPCLabelIndex, 4);
SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
Callee = DAG.getLoad(getPointerTy(), dl,
@@ -1166,7 +1165,7 @@ ARMTargetLowering::LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA,
EVT PtrVT = getPointerTy();
unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
ARMConstantPoolValue *CPV =
new ARMConstantPoolValue(GA->getGlobal(), ARMPCLabelIndex, ARMCP::CPValue,
new ARMConstantPoolValue(GA->getGlobal(), ARMPCLabelIndex,
PCAdj, "tlsgd", true);
SDValue Argument = DAG.getTargetConstantPool(CPV, PtrVT, 4);
Argument = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Argument);
@@ -1208,7 +1207,7 @@ ARMTargetLowering::LowerToTLSExecModels(GlobalAddressSDNode *GA,
// initial exec model
unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
ARMConstantPoolValue *CPV =
new ARMConstantPoolValue(GA->getGlobal(), ARMPCLabelIndex, ARMCP::CPValue,
new ARMConstantPoolValue(GA->getGlobal(), ARMPCLabelIndex,
PCAdj, "gottpoff", true);
Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
@@ -1221,8 +1220,7 @@ ARMTargetLowering::LowerToTLSExecModels(GlobalAddressSDNode *GA,
Offset = DAG.getLoad(PtrVT, dl, Chain, Offset, NULL, 0);
} else {
// local exec model
ARMConstantPoolValue *CPV =
new ARMConstantPoolValue(GV, ARMCP::CPValue, "tpoff");
ARMConstantPoolValue *CPV = new ARMConstantPoolValue(GV, "tpoff");
Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
Offset = DAG.getLoad(PtrVT, dl, Chain, Offset, NULL, 0);
@@ -1256,7 +1254,7 @@ SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
if (RelocM == Reloc::PIC_) {
bool UseGOTOFF = GV->hasLocalLinkage() || GV->hasHiddenVisibility();
ARMConstantPoolValue *CPV =
new ARMConstantPoolValue(GV, ARMCP::CPValue, UseGOTOFF ? "GOTOFF":"GOT");
new ARMConstantPoolValue(GV, UseGOTOFF ? "GOTOFF" : "GOT");
SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
@@ -1274,34 +1272,19 @@ SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
}
}
/// GVIsIndirectSymbol - true if the GV will be accessed via an indirect symbol
/// even in non-static mode.
static bool GVIsIndirectSymbol(GlobalValue *GV, Reloc::Model RelocM) {
// If symbol visibility is hidden, the extra load is not needed if
// the symbol is definitely defined in the current translation unit.
bool isDecl = GV->isDeclaration() || GV->hasAvailableExternallyLinkage();
if (GV->hasHiddenVisibility() && (!isDecl && !GV->hasCommonLinkage()))
return false;
return RelocM != Reloc::Static && (isDecl || GV->isWeakForLinker());
}
SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
SelectionDAG &DAG) {
EVT PtrVT = getPointerTy();
DebugLoc dl = Op.getDebugLoc();
GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
Reloc::Model RelocM = getTargetMachine().getRelocationModel();
bool IsIndirect = GVIsIndirectSymbol(GV, RelocM);
SDValue CPAddr;
if (RelocM == Reloc::Static)
CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
else {
unsigned PCAdj = (RelocM != Reloc::PIC_)
? 0 : (Subtarget->isThumb() ? 4 : 8);
ARMCP::ARMCPKind Kind = IsIndirect ? ARMCP::CPNonLazyPtr
: ARMCP::CPValue;
ARMConstantPoolValue *CPV = new ARMConstantPoolValue(GV, ARMPCLabelIndex,
Kind, PCAdj);
unsigned PCAdj = (RelocM != Reloc::PIC_) ? 0 : (Subtarget->isThumb()?4:8);
ARMConstantPoolValue *CPV =
new ARMConstantPoolValue(GV, ARMPCLabelIndex, PCAdj);
CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
}
CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
@@ -1313,7 +1296,8 @@ SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex++, MVT::i32);
Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
}
if (IsIndirect)
if (Subtarget->GVIsIndirectSymbol(GV, RelocM == Reloc::Static))
Result = DAG.getLoad(PtrVT, dl, Chain, Result, NULL, 0);
return Result;
@@ -1328,8 +1312,7 @@ SDValue ARMTargetLowering::LowerGLOBAL_OFFSET_TABLE(SDValue Op,
unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
ARMConstantPoolValue *CPV = new ARMConstantPoolValue(*DAG.getContext(),
"_GLOBAL_OFFSET_TABLE_",
ARMPCLabelIndex,
ARMCP::CPValue, PCAdj);
ARMPCLabelIndex, PCAdj);
SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr, NULL, 0);
@@ -1403,14 +1386,13 @@ ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) {
SDValue CPAddr;
unsigned PCAdj = (RelocM != Reloc::PIC_)
? 0 : (Subtarget->isThumb() ? 4 : 8);
ARMCP::ARMCPKind Kind = ARMCP::CPValue;
// Save off the LSDA name for the AsmPrinter to use when it's time
// to emit the table
std::string LSDAName = "L_lsda_";
LSDAName += MF.getFunction()->getName();
ARMConstantPoolValue *CPV =
new ARMConstantPoolValue(*DAG.getContext(), LSDAName.c_str(),
ARMPCLabelIndex, Kind, PCAdj);
ARMPCLabelIndex, PCAdj);
CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
SDValue Result =