diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/Mips/MipsSEFrameLowering.cpp | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp b/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp index a516e947975..94885d680bb 100644 --- a/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp +++ b/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp @@ -319,6 +319,15 @@ bool ExpandPseudo::expandBuildPairF64(MachineBasicBlock &MBB, bool ExpandPseudo::expandExtractElementF64(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, bool FP64) const { + const MachineOperand &Op1 = I->getOperand(1); + const MachineOperand &Op2 = I->getOperand(2); + + if ((Op1.isReg() && Op1.isUndef()) || (Op2.isReg() && Op2.isUndef())) { + unsigned DstReg = I->getOperand(0).getReg(); + BuildMI(MBB, I, I->getDebugLoc(), TII.get(Mips::IMPLICIT_DEF), DstReg); + return true; + } + // For fpxx and when mfhc1 is not available, use: // spill + reload via ldc1 // @@ -335,8 +344,8 @@ bool ExpandPseudo::expandExtractElementF64(MachineBasicBlock &MBB, if ((Subtarget.isABI_FPXX() && !Subtarget.hasMTHC1()) || (FP64 && !Subtarget.useOddSPReg())) { unsigned DstReg = I->getOperand(0).getReg(); - unsigned SrcReg = I->getOperand(1).getReg(); - unsigned N = I->getOperand(2).getImm(); + unsigned SrcReg = Op1.getReg(); + unsigned N = Op2.getImm(); int64_t Offset = 4 * (Subtarget.isLittle() ? N : (1 - N)); // It should be impossible to have FGR64 on MIPS-II or MIPS32r1 (which are @@ -352,8 +361,7 @@ bool ExpandPseudo::expandExtractElementF64(MachineBasicBlock &MBB, // We re-use the same spill slot each time so that the stack frame doesn't // grow too much in functions with a large number of moves. int FI = MF.getInfo<MipsFunctionInfo>()->getMoveF64ViaSpillFI(RC); - TII.storeRegToStack(MBB, I, SrcReg, I->getOperand(1).isKill(), FI, RC, - &RegInfo, 0); + TII.storeRegToStack(MBB, I, SrcReg, Op1.isKill(), FI, RC, &RegInfo, 0); TII.loadRegFromStack(MBB, I, DstReg, FI, RC2, &RegInfo, Offset); return true; } |
