diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMAsmPrinter.cpp | 72 |
1 files changed, 58 insertions, 14 deletions
diff --git a/llvm/lib/Target/ARM/ARMAsmPrinter.cpp b/llvm/lib/Target/ARM/ARMAsmPrinter.cpp index 13335a84f6d..2147c1cfcf8 100644 --- a/llvm/lib/Target/ARM/ARMAsmPrinter.cpp +++ b/llvm/lib/Target/ARM/ARMAsmPrinter.cpp @@ -1204,6 +1204,10 @@ void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) { MCTargetStreamer &TS = *OutStreamer->getTargetStreamer(); ARMTargetStreamer &ATS = static_cast<ARMTargetStreamer &>(TS); + const MachineFunction &MF = *MI->getParent()->getParent(); + const ARMSubtarget &STI = MF.getSubtarget<ARMSubtarget>(); + unsigned FramePtr = STI.useR7AsFramePointer() ? ARM::R7 : ARM::R11; + // If we just ended a constant pool, mark it as such. if (InConstantPool && MI->getOpcode() != ARM::CONSTPOOL_ENTRY) { OutStreamer->EmitDataRegion(MCDR_DataRegionEnd); @@ -1884,13 +1888,33 @@ void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) { .addImm(ARMCC::AL) .addReg(0)); - EmitToStreamer(*OutStreamer, MCInstBuilder(ARM::LDRi12) - .addReg(ARM::R7) - .addReg(SrcReg) - .addImm(0) - // Predicate. - .addImm(ARMCC::AL) - .addReg(0)); + if (STI.isTargetDarwin() || STI.isTargetWindows()) { + // These platforms always use the same frame register + EmitToStreamer(*OutStreamer, MCInstBuilder(ARM::LDRi12) + .addReg(FramePtr) + .addReg(SrcReg) + .addImm(0) + // Predicate. + .addImm(ARMCC::AL) + .addReg(0)); + } else { + // If the calling code might use either R7 or R11 as + // frame pointer register, restore it into both. + EmitToStreamer(*OutStreamer, MCInstBuilder(ARM::LDRi12) + .addReg(ARM::R7) + .addReg(SrcReg) + .addImm(0) + // Predicate. + .addImm(ARMCC::AL) + .addReg(0)); + EmitToStreamer(*OutStreamer, MCInstBuilder(ARM::LDRi12) + .addReg(ARM::R11) + .addReg(SrcReg) + .addImm(0) + // Predicate. + .addImm(ARMCC::AL) + .addReg(0)); + } assert(Subtarget->hasV4TOps()); EmitToStreamer(*OutStreamer, MCInstBuilder(ARM::BX) @@ -1934,13 +1958,33 @@ void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) { .addImm(ARMCC::AL) .addReg(0)); - EmitToStreamer(*OutStreamer, MCInstBuilder(ARM::tLDRi) - .addReg(ARM::R7) - .addReg(SrcReg) - .addImm(0) - // Predicate. - .addImm(ARMCC::AL) - .addReg(0)); + if (STI.isTargetDarwin() || STI.isTargetWindows()) { + // These platforms always use the same frame register + EmitToStreamer(*OutStreamer, MCInstBuilder(ARM::tLDRi) + .addReg(FramePtr) + .addReg(SrcReg) + .addImm(0) + // Predicate. + .addImm(ARMCC::AL) + .addReg(0)); + } else { + // If the calling code might use either R7 or R11 as + // frame pointer register, restore it into both. + EmitToStreamer(*OutStreamer, MCInstBuilder(ARM::tLDRi) + .addReg(ARM::R7) + .addReg(SrcReg) + .addImm(0) + // Predicate. + .addImm(ARMCC::AL) + .addReg(0)); + EmitToStreamer(*OutStreamer, MCInstBuilder(ARM::tLDRi) + .addReg(ARM::R11) + .addReg(SrcReg) + .addImm(0) + // Predicate. + .addImm(ARMCC::AL) + .addReg(0)); + } EmitToStreamer(*OutStreamer, MCInstBuilder(ARM::tBX) .addReg(ScratchReg) |
