[llvm] 63b4351 - [AVR] Remove LPM/ELPM custom decoder (NFC) (#156928)

[via llvm-commits]

Author: Sergei Barannikov
Date: 2025-09-05T10:25:54+03:00
New Revision: 63b4351bbd01d8607a0460cc353807cc914f941d

URL: https://github.com/llvm/llvm-project/commit/63b4351bbd01d8607a0460cc353807cc914f941d
DIFF: https://github.com/llvm/llvm-project/commit/63b4351bbd01d8607a0460cc353807cc914f941d.diff

LOG: [AVR] Remove LPM/ELPM custom decoder (NFC) (#156928)

Follow-up to #156361.

Added: 
    

Modified: 
    llvm/lib/Target/AVR/AVRInstrFormats.td
    llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/AVR/AVRInstrFormats.td b/llvm/lib/Target/AVR/AVRInstrFormats.td
index eb4daf74545b0..7ffe2e1058b46 100644
--- a/llvm/lib/Target/AVR/AVRInstrFormats.td
+++ b/llvm/lib/Target/AVR/AVRInstrFormats.td
@@ -201,20 +201,14 @@ class FSTLD<bit type, bits<2> mode, dag outs, dag ins, string asmstr,
 //===---------------------------------------------------------------------===//
 class FLPMX<bit e, bit p, dag outs, dag ins, string asmstr, list<dag> pattern>
     : AVRInst16<outs, ins, asmstr, pattern> {
+  bits<0> z;
   bits<5> rd;
 
-  let Inst{15 - 12} = 0b1001;
-
-  let Inst{11 - 9} = 0b000;
-  let Inst{8} = rd{4};
-
-  let Inst{7 - 4} = rd{3 - 0};
-
+  let Inst{15 - 9} = 0b1001000;
+  let Inst{8 - 4} = rd;
   let Inst{3 - 2} = 0b01;
   let Inst{1} = e;
   let Inst{0} = p;
-
-  let DecoderMethod = "decodeFLPMX";
 }
 
 //===----------------------------------------------------------------------===//

diff  --git a/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp b/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp
index d874697185fac..a6d4655cb5300 100644
--- a/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp
+++ b/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp
@@ -150,14 +150,6 @@ static DecodeStatus decodeFRd(MCInst &Inst, unsigned Insn, uint64_t Address,
   return MCDisassembler::Success;
 }
 
-static DecodeStatus decodeFLPMX(MCInst &Inst, unsigned Insn, uint64_t Address,
-                                const MCDisassembler *Decoder) {
-  if (decodeFRd(Inst, Insn, Address, Decoder) == MCDisassembler::Fail)
-    return MCDisassembler::Fail;
-  Inst.addOperand(MCOperand::createReg(AVR::R31R30));
-  return MCDisassembler::Success;
-}
-
 static DecodeStatus decodeFFMULRdRr(MCInst &Inst, unsigned Insn,
                                     uint64_t Address,
                                     const MCDisassembler *Decoder) {