// This will go before any implicit ops.
AddDefaultPred(MachineInstrBuilder(MI).addOperand(MI->getOperand(1)));
}
+
+bool ARMBaseInstrInfo::hasNOP() const {
+ return (Subtarget.getFeatureBits() & ARM::HasV6T2Ops) != 0;
+}
explicit ARMBaseInstrInfo(const ARMSubtarget &STI);
public:
+ // Return whether the target has an explicit NOP encoding.
+ bool hasNOP() const;
+
// Return the non-pre/post incrementing version of 'Opc'. Return 0
// if there is not such an opcode.
virtual unsigned getUnindexedOpcode(unsigned Opc) const =0;
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCInst.h"
using namespace llvm;
ARMInstrInfo::ARMInstrInfo(const ARMSubtarget &STI)
: ARMBaseInstrInfo(STI), RI(*this, STI) {
}
+/// getNoopForMachoTarget - Return the noop instruction to use for a noop.
+void ARMInstrInfo::getNoopForMachoTarget(MCInst &NopInst) const {
+ if (hasNOP()) {
+ NopInst.setOpcode(ARM::NOP);
+ NopInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
+ NopInst.addOperand(MCOperand::CreateReg(0));
+ } else {
+ NopInst.setOpcode(ARM::MOVr);
+ NopInst.addOperand(MCOperand::CreateReg(ARM::R0));
+ NopInst.addOperand(MCOperand::CreateReg(ARM::R0));
+ NopInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
+ NopInst.addOperand(MCOperand::CreateReg(0));
+ NopInst.addOperand(MCOperand::CreateReg(0));
+ }
+}
+
unsigned ARMInstrInfo::getUnindexedOpcode(unsigned Opc) const {
switch (Opc) {
default: break;
public:
explicit ARMInstrInfo(const ARMSubtarget &STI);
+ /// getNoopForMachoTarget - Return the noop instruction to use for a noop.
+ void getNoopForMachoTarget(MCInst &NopInst) const;
+
// Return the non-pre/post incrementing version of 'Opc'. Return 0
// if there is not such an opcode.
unsigned getUnindexedOpcode(unsigned Opc) const;
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/ADT/SmallVector.h"
-#include "Thumb1InstrInfo.h"
+#include "llvm/MC/MCInst.h"
using namespace llvm;
: ARMBaseInstrInfo(STI), RI(*this, STI) {
}
+/// getNoopForMachoTarget - Return the noop instruction to use for a noop.
+void Thumb1InstrInfo::getNoopForMachoTarget(MCInst &NopInst) const {
+ NopInst.setOpcode(ARM::tMOVr);
+ NopInst.addOperand(MCOperand::CreateReg(ARM::R8));
+ NopInst.addOperand(MCOperand::CreateReg(ARM::R8));
+ NopInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
+ NopInst.addOperand(MCOperand::CreateReg(0));
+}
+
unsigned Thumb1InstrInfo::getUnindexedOpcode(unsigned Opc) const {
return 0;
}
public:
explicit Thumb1InstrInfo(const ARMSubtarget &STI);
+ /// getNoopForMachoTarget - Return the noop instruction to use for a noop.
+ void getNoopForMachoTarget(MCInst &NopInst) const;
+
// Return the non-pre/post incrementing version of 'Opc'. Return 0
// if there is not such an opcode.
unsigned getUnindexedOpcode(unsigned Opc) const;
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/MC/MCInst.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
: ARMBaseInstrInfo(STI), RI(*this, STI) {
}
+/// getNoopForMachoTarget - Return the noop instruction to use for a noop.
+void Thumb2InstrInfo::getNoopForMachoTarget(MCInst &NopInst) const {
+ NopInst.setOpcode(ARM::tNOP);
+ NopInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
+ NopInst.addOperand(MCOperand::CreateReg(0));
+}
+
unsigned Thumb2InstrInfo::getUnindexedOpcode(unsigned Opc) const {
// FIXME
return 0;
public:
explicit Thumb2InstrInfo(const ARMSubtarget &STI);
+ /// getNoopForMachoTarget - Return the noop instruction to use for a noop.
+ void getNoopForMachoTarget(MCInst &NopInst) const;
+
// Return the non-pre/post incrementing version of 'Opc'. Return 0
// if there is not such an opcode.
unsigned getUnindexedOpcode(unsigned Opc) const;
--- /dev/null
+; RUN: llc < %s -filetype=obj -mtriple=thumbv6-apple-darwin -o - | macho-dump -dump-section-data | FileCheck -prefix=T1
+; RUN: llc < %s -filetype=obj -mtriple=thumbv7-apple-darwin -o - | macho-dump -dump-section-data | FileCheck -prefix=T2
+; RUN: llc < %s -filetype=obj -mtriple=armv6-apple-darwin -o - | macho-dump -dump-section-data | FileCheck -prefix=ARM
+; RUN: llc < %s -filetype=obj -mtriple=armv7-apple-darwin -o - | macho-dump -dump-section-data | FileCheck -prefix=ARMV7
+
+; Empty functions need a NOP in them for MachO to prevent DWARF FDEs from
+; getting all mucked up. See lib/CodeGen/AsmPrinter/AsmPrinter.cpp for
+; details.
+define internal fastcc void @empty_function() {
+ unreachable
+}
+; CHECK-T1: ('_section_data', 'c046')
+; CHECK-T2: ('_section_data', '00bf')
+; CHECK-ARM: ('_section_data', '0000a0e1')
+; CHECK-ARMV7: ('_section_data', '00f020e3')