Skip over two-address use operands.

llvm-svn: 58883

1 files changed, 12 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM/ARMCodeEmitter.cpp b/llvm/lib/Target/ARM/ARMCodeEmitter.cpp
index 49d2cb0ae6e..336c04d5429 100644
--- a/llvm/lib/Target/ARM/ARMCodeEmitter.cpp
+++ b/llvm/lib/Target/ARM/ARMCodeEmitter.cpp
@@ -633,6 +633,8 @@ void ARMCodeEmitter::emitDataProcessingInstruction(const MachineInstr &MI,
 void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
                                               unsigned ImplicitRd,
                                               unsigned ImplicitRn) {
+  const TargetInstrDesc &TID = MI.getDesc();
+
   // Part of binary is determined by TableGn.
   unsigned Binary = getBinaryCodeForInstr(MI);
 
@@ -656,6 +658,10 @@ void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
   else
     Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
 
+  // If this is a two-address operand, skip it. e.g. LDR_PRE.
+  if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
+    ++OpIdx;
+
   const MachineOperand &MO2 = MI.getOperand(OpIdx);
   unsigned AM2Opc = (ImplicitRn == ARM::PC)
     ? 0 : MI.getOperand(OpIdx+1).getImm();
@@ -689,6 +695,8 @@ void ARMCodeEmitter::emitLoadStoreInstruction(const MachineInstr &MI,
 
 void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
                                                   unsigned ImplicitRn) {
+  const TargetInstrDesc &TID = MI.getDesc();
+
   // Part of binary is determined by TableGn.
   unsigned Binary = getBinaryCodeForInstr(MI);
 
@@ -707,6 +715,10 @@ void ARMCodeEmitter::emitMiscLoadStoreInstruction(const MachineInstr &MI,
   else
     Binary |= getMachineOpValue(MI, OpIdx++) << ARMII::RegRnShift;
 
+  // If this is a two-address operand, skip it. e.g. LDRH_POST.
+  if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
+    ++OpIdx;
+
   const MachineOperand &MO2 = MI.getOperand(OpIdx);
   unsigned AM3Opc = (ImplicitRn == ARM::PC)
     ? 0 : MI.getOperand(OpIdx+1).getImm();