[ARM] Fix STRT/STRHT/STRBT input/output operands.

STRT, STRHT, and STRBT are store instructions and their source register
$Rt should be treated as an input operand instead of an output operand.
This should fix things (e.g., liveness tracking in LivePhysRegs) if
these instructions were used in CodeGen.

Differential Revision: https://reviews.llvm.org/D95074

Author: chaosdefinition

llvm/lib/Target/ARM/ARMInstrThumb2.td

@@ -1724,7 +1724,7 @@ def t2STRH_preidx: t2PseudoInst<(outs GPRnopc:$Rn_wb),
 // only.
 // Ref: A8.6.193 STR (immediate, Thumb) Encoding T4
 class T2IstT<bits<2> type, string opc, InstrItinClass ii>
-  : T2Ii8<(outs rGPR:$Rt), (ins t2addrmode_imm8:$addr), ii, opc,
+  : T2Ii8<(outs), (ins rGPR:$Rt, t2addrmode_imm8:$addr), ii, opc,
           "\t$Rt, $addr", []>, Sched<[WriteST]> {
   let Inst{31-27} = 0b11111;
   let Inst{26-25} = 0b00;