diff options
Diffstat (limited to 'llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp')
| -rw-r--r-- | llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp index dc2aab8..efd8dbe 100644 --- a/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp +++ b/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp @@ -98,7 +98,8 @@ static void ImposeStackOrdering(MachineInstr *MI) { static void ConvertImplicitDefToConstZero(MachineInstr *MI, MachineRegisterInfo &MRI, const TargetInstrInfo *TII, - MachineFunction &MF) { + MachineFunction &MF, + LiveIntervals &LIS) { assert(MI->getOpcode() == TargetOpcode::IMPLICIT_DEF); const auto *RegClass = MRI.getRegClass(MI->getOperand(0).getReg()); @@ -119,10 +120,13 @@ static void ConvertImplicitDefToConstZero(MachineInstr *MI, Type::getDoubleTy(MF.getFunction().getContext()))); MI->addOperand(MachineOperand::CreateFPImm(Val)); } else if (RegClass == &WebAssembly::V128RegClass) { - // TODO: make splat instead of constant - MI->setDesc(TII->get(WebAssembly::CONST_V128_v16i8)); - for (int I = 0; I < 16; ++I) - MI->addOperand(MachineOperand::CreateImm(0)); + unsigned TempReg = MRI.createVirtualRegister(&WebAssembly::I32RegClass); + MI->setDesc(TII->get(WebAssembly::SPLAT_v4i32)); + MI->addOperand(MachineOperand::CreateReg(TempReg, false)); + MachineInstr *Const = BuildMI(*MI->getParent(), MI, MI->getDebugLoc(), + TII->get(WebAssembly::CONST_I32), TempReg) + .addImm(0); + LIS.InsertMachineInstrInMaps(*Const); } else { llvm_unreachable("Unexpected reg class"); } @@ -895,7 +899,7 @@ bool WebAssemblyRegStackify::runOnMachineFunction(MachineFunction &MF) { // to a constant 0 so that the def is explicit, and the push/pop // correspondence is maintained. if (Insert->getOpcode() == TargetOpcode::IMPLICIT_DEF) - ConvertImplicitDefToConstZero(Insert, MRI, TII, MF); + ConvertImplicitDefToConstZero(Insert, MRI, TII, MF, LIS); // We stackified an operand. Add the defining instruction's operands to // the worklist stack now to continue to build an ever deeper tree. |