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ARM: Fix ELF global base reg intialization.
The create machine code wasn't properly in SSA, which the machine verifier properly complains about. Now that fast-isel is closer to verifier clean, errors like this show up more clearly. Additionally, the Thumb pseudo tPICADD was used for both ARM and Thumb mode functions, which is obviously wrong. Fix that along the way. Test case is part of the following commit which will finish making an additional fast-isel test verifier clean an enable it for the regression test suite. This commit is separate since its not just a verifier cleanup, but an actual correctness issue. rdar://12594152 (for the fast-isel verifier aspects) llvm-svn: 189269
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@ -22,6 +22,7 @@
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineJumpTableInfo.h"
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#include "llvm/CodeGen/MachineJumpTableInfo.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCAsmInfo.h"
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@ -119,20 +120,24 @@ namespace {
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MachineBasicBlock &FirstMBB = MF.front();
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MachineBasicBlock &FirstMBB = MF.front();
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MachineBasicBlock::iterator MBBI = FirstMBB.begin();
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MachineBasicBlock::iterator MBBI = FirstMBB.begin();
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DebugLoc DL = FirstMBB.findDebugLoc(MBBI);
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DebugLoc DL = FirstMBB.findDebugLoc(MBBI);
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unsigned GlobalBaseReg = AFI->getGlobalBaseReg();
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unsigned TempReg =
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MF.getRegInfo().createVirtualRegister(&ARM::rGPRRegClass);
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unsigned Opc = TM->getSubtarget<ARMSubtarget>().isThumb2() ?
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unsigned Opc = TM->getSubtarget<ARMSubtarget>().isThumb2() ?
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ARM::t2LDRpci : ARM::LDRcp;
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ARM::t2LDRpci : ARM::LDRcp;
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const TargetInstrInfo &TII = *TM->getInstrInfo();
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const TargetInstrInfo &TII = *TM->getInstrInfo();
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MachineInstrBuilder MIB = BuildMI(FirstMBB, MBBI, DL,
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MachineInstrBuilder MIB = BuildMI(FirstMBB, MBBI, DL,
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TII.get(Opc), GlobalBaseReg)
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TII.get(Opc), TempReg)
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.addConstantPoolIndex(Idx);
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.addConstantPoolIndex(Idx);
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if (Opc == ARM::LDRcp)
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if (Opc == ARM::LDRcp)
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MIB.addImm(0);
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MIB.addImm(0);
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AddDefaultPred(MIB);
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AddDefaultPred(MIB);
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// Fix the GOT address by adding pc.
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// Fix the GOT address by adding pc.
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unsigned GlobalBaseReg = AFI->getGlobalBaseReg();
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Opc = TM->getSubtarget<ARMSubtarget>().isThumb2() ? ARM::tPICADD
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: ARM::PICADD;
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BuildMI(FirstMBB, MBBI, DL, TII.get(ARM::tPICADD), GlobalBaseReg)
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BuildMI(FirstMBB, MBBI, DL, TII.get(ARM::tPICADD), GlobalBaseReg)
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.addReg(GlobalBaseReg).addImm(ARMPCLabelIndex);
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.addReg(TempReg).addImm(ARMPCLabelIndex);
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return true;
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return true;
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}
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}
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