[PowerPC] Put PPCVSXCopy into its own source file

PPCInstrInfo.cpp has ended up containing several small MI-level passes, and
this is making the file harder to read than necessary. Split out
PPCVSXCopy into its own source file. NFC.

llvm-svn: 227771

1 files changed, 0 insertions, 139 deletions

diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
index a0370a0f069..e5b2cf1c03e 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -1606,145 +1606,6 @@ unsigned PPCInstrInfo::GetInstSizeInBytes(const MachineInstr *MI) const {
 }
 
 #undef DEBUG_TYPE
-#define DEBUG_TYPE "ppc-vsx-copy"
-
-namespace llvm {
-  void initializePPCVSXCopyPass(PassRegistry&);
-}
-
-namespace {
-  // PPCVSXCopy pass - For copies between VSX registers and non-VSX registers
-  // (Altivec and scalar floating-point registers), we need to transform the
-  // copies into subregister copies with other restrictions.
-  struct PPCVSXCopy : public MachineFunctionPass {
-    static char ID;
-    PPCVSXCopy() : MachineFunctionPass(ID) {
-      initializePPCVSXCopyPass(*PassRegistry::getPassRegistry());
-    }
-
-    const TargetInstrInfo *TII;
-
-    bool IsRegInClass(unsigned Reg, const TargetRegisterClass *RC,
-                      MachineRegisterInfo &MRI) {
-      if (TargetRegisterInfo::isVirtualRegister(Reg)) {
-        return RC->hasSubClassEq(MRI.getRegClass(Reg));
-      } else if (RC->contains(Reg)) {
-        return true;
-      }
-
-      return false;
-    }
-
-    bool IsVSReg(unsigned Reg, MachineRegisterInfo &MRI) {
-      return IsRegInClass(Reg, &PPC::VSRCRegClass, MRI);
-    }
-
-    bool IsVRReg(unsigned Reg, MachineRegisterInfo &MRI) {
-      return IsRegInClass(Reg, &PPC::VRRCRegClass, MRI);
-    }
-
-    bool IsF8Reg(unsigned Reg, MachineRegisterInfo &MRI) {
-      return IsRegInClass(Reg, &PPC::F8RCRegClass, MRI);
-    }
-
-protected:
-    bool processBlock(MachineBasicBlock &MBB) {
-      bool Changed = false;
-
-      MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
-      for (MachineBasicBlock::iterator I = MBB.begin(), IE = MBB.end();
-           I != IE; ++I) {
-        MachineInstr *MI = I;
-        if (!MI->isFullCopy())
-          continue;
-
-        MachineOperand &DstMO = MI->getOperand(0);
-        MachineOperand &SrcMO = MI->getOperand(1);
-
-        if ( IsVSReg(DstMO.getReg(), MRI) &&
-            !IsVSReg(SrcMO.getReg(), MRI)) {
-          // This is a copy *to* a VSX register from a non-VSX register.
-          Changed = true;
-
-          const TargetRegisterClass *SrcRC =
-            IsVRReg(SrcMO.getReg(), MRI) ? &PPC::VSHRCRegClass :
-                                           &PPC::VSLRCRegClass;
-          assert((IsF8Reg(SrcMO.getReg(), MRI) ||
-                  IsVRReg(SrcMO.getReg(), MRI)) &&
-                 "Unknown source for a VSX copy");
-
-          unsigned NewVReg = MRI.createVirtualRegister(SrcRC);
-          BuildMI(MBB, MI, MI->getDebugLoc(),
-                  TII->get(TargetOpcode::SUBREG_TO_REG), NewVReg)
-            .addImm(1) // add 1, not 0, because there is no implicit clearing
-                       // of the high bits.
-            .addOperand(SrcMO)
-            .addImm(IsVRReg(SrcMO.getReg(), MRI) ? PPC::sub_128 :
-                                                   PPC::sub_64);
-
-          // The source of the original copy is now the new virtual register.
-          SrcMO.setReg(NewVReg);
-        } else if (!IsVSReg(DstMO.getReg(), MRI) &&
-                    IsVSReg(SrcMO.getReg(), MRI)) {
-          // This is a copy *from* a VSX register to a non-VSX register.
-          Changed = true;
-
-          const TargetRegisterClass *DstRC =
-            IsVRReg(DstMO.getReg(), MRI) ? &PPC::VSHRCRegClass :
-                                           &PPC::VSLRCRegClass;
-          assert((IsF8Reg(DstMO.getReg(), MRI) ||
-                  IsVRReg(DstMO.getReg(), MRI)) &&
-                 "Unknown destination for a VSX copy");
-
-          // Copy the VSX value into a new VSX register of the correct subclass.
-          unsigned NewVReg = MRI.createVirtualRegister(DstRC);
-          BuildMI(MBB, MI, MI->getDebugLoc(),
-                  TII->get(TargetOpcode::COPY), NewVReg)
-            .addOperand(SrcMO);
-
-          // Transform the original copy into a subregister extraction copy.
-          SrcMO.setReg(NewVReg);
-          SrcMO.setSubReg(IsVRReg(DstMO.getReg(), MRI) ? PPC::sub_128 :
-                                                         PPC::sub_64);
-        }
-      }
-
-      return Changed;
-    }
-
-public:
-    bool runOnMachineFunction(MachineFunction &MF) override {
-      // If we don't have VSX on the subtarget, don't do anything.
-      const PPCSubtarget &STI = MF.getSubtarget<PPCSubtarget>();
-      if (!STI.hasVSX())
-        return false;
-      TII = STI.getInstrInfo();
-
-      bool Changed = false;
-
-      for (MachineFunction::iterator I = MF.begin(); I != MF.end();) {
-        MachineBasicBlock &B = *I++;
-        if (processBlock(B))
-          Changed = true;
-      }
-
-      return Changed;
-    }
-
-    void getAnalysisUsage(AnalysisUsage &AU) const override {
-      MachineFunctionPass::getAnalysisUsage(AU);
-    }
-  };
-}
-
-INITIALIZE_PASS(PPCVSXCopy, DEBUG_TYPE,
-                "PowerPC VSX Copy Legalization", false, false)
-
-char PPCVSXCopy::ID = 0;
-FunctionPass*
-llvm::createPPCVSXCopyPass() { return new PPCVSXCopy(); }
-
-#undef DEBUG_TYPE
 #define DEBUG_TYPE "ppc-early-ret"
 STATISTIC(NumBCLR, "Number of early conditional returns");
 STATISTIC(NumBLR,  "Number of early returns");