From 885f1a0c048e07fca56bc256702c58eae50ae71f Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Tue, 13 Sep 2011 02:29:58 +0000
Subject: [PATCH] Zap some junk from the ARM instruction descriptions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139575 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMCodeEmitter.cpp             |  2 --
 lib/Target/ARM/ARMInstrInfo.td                | 31 -------------------
 lib/Target/ARM/ARMInstrThumb2.td              | 20 ------------
 .../ARM/MCTargetDesc/ARMMCCodeEmitter.cpp     | 14 ---------
 4 files changed, 67 deletions(-)

diff --git a/lib/Target/ARM/ARMCodeEmitter.cpp b/lib/Target/ARM/ARMCodeEmitter.cpp
index 9d659bb1944..7473c9b75dc 100644
--- a/lib/Target/ARM/ARMCodeEmitter.cpp
+++ b/lib/Target/ARM/ARMCodeEmitter.cpp
@@ -234,8 +234,6 @@ namespace {
       const { return 0; }
     unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
                                             unsigned Op) const { return 0; }
-    unsigned getMsbOpValue(const MachineInstr &MI,
-                           unsigned Op) const { return 0; }
     unsigned getSsatBitPosValue(const MachineInstr &MI,
                                 unsigned Op) const { return 0; }
     uint32_t getLdStmModeOpValue(const MachineInstr &MI, unsigned OpIdx)
diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index c935df9a8b2..7007b4ec1ca 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -578,18 +578,6 @@ def bf_inv_mask_imm : Operand<i32>,
   let ParserMatchClass = BitfieldAsmOperand;
 }
 
-/// lsb_pos_imm - position of the lsb bit, used by BFI4p and t2BFI4p
-def lsb_pos_imm : Operand<i32>, ImmLeaf<i32, [{
-  return isInt<5>(Imm);
-}]>;
-
-/// width_imm - number of bits to be copied, used by BFI4p and t2BFI4p
-def width_imm : Operand<i32>, ImmLeaf<i32, [{
-  return Imm > 0 &&  Imm <= 32;
-}] > {
-  let EncoderMethod = "getMsbOpValue";
-}
-
 def imm1_32_XFORM: SDNodeXForm<imm, [{
   return CurDAG->getTargetConstant((int)N->getZExtValue() - 1, MVT::i32);
 }]>;
@@ -3411,25 +3399,6 @@ def BFI:I<(outs GPRnopc:$Rd), (ins GPRnopc:$src, GPR:$Rn, bf_inv_mask_imm:$imm),
   let Inst{3-0}   = Rn;
 }
 
-// GNU as only supports this form of bfi (w/ 4 arguments)
-let isAsmParserOnly = 1 in
-def BFI4p : I<(outs GPRnopc:$Rd), (ins GPRnopc:$src, GPR:$Rn,
-                                   lsb_pos_imm:$lsb, width_imm:$width),
-               AddrMode1, 4, IndexModeNone, DPFrm, IIC_iUNAsi,
-               "bfi", "\t$Rd, $Rn, $lsb, $width", "$src = $Rd",
-               []>, Requires<[IsARM, HasV6T2]> {
-  bits<4> Rd;
-  bits<4> Rn;
-  bits<5> lsb;
-  bits<5> width;
-  let Inst{27-21} = 0b0111110;
-  let Inst{6-4}   = 0b001; // Rn: Inst{3-0} != 15
-  let Inst{15-12} = Rd;
-  let Inst{11-7}  = lsb;
-  let Inst{20-16} = width; // Custom encoder => lsb+width-1
-  let Inst{3-0}   = Rn;
-}
-
 def  MVNr  : AsI1<0b1111, (outs GPR:$Rd), (ins GPR:$Rm), DPFrm, IIC_iMVNr,
                   "mvn", "\t$Rd, $Rm",
                   [(set GPR:$Rd, (not GPR:$Rm))]>, UnaryDP {
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index afcaa2bfa45..4e7787b587a 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -2240,26 +2240,6 @@ let Constraints = "$src = $Rd" in {
     let msb{4-0} = imm{9-5};
     let lsb{4-0} = imm{4-0};
   }
-
-  // GNU as only supports this form of bfi (w/ 4 arguments)
-  let isAsmParserOnly = 1 in
-  def t2BFI4p : T2TwoRegBitFI<(outs rGPR:$Rd),
-                  (ins rGPR:$src, rGPR:$Rn, lsb_pos_imm:$lsbit,
-                       width_imm:$width),
-                  IIC_iBITi, "bfi", "\t$Rd, $Rn, $lsbit, $width",
-                  []> {
-    let Inst{31-27} = 0b11110;
-    let Inst{26} = 0; // should be 0.
-    let Inst{25} = 1;
-    let Inst{24-20} = 0b10110;
-    let Inst{15} = 0;
-    let Inst{5} = 0; // should be 0.
-
-    bits<5> lsbit;
-    bits<5> width;
-    let msb{4-0} = width; // Custom encoder => lsb+width-1
-    let lsb{4-0} = lsbit;
-  }
 }
 
 defm t2ORN  : T2I_bin_irs<0b0011, "orn",
diff --git a/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp b/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp
index f0cb95f39b1..9117d65dbc2 100644
--- a/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp
+++ b/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp
@@ -283,9 +283,6 @@ public:
   unsigned getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op,
                                       SmallVectorImpl<MCFixup> &Fixups) const;
 
-  unsigned getMsbOpValue(const MCInst &MI, unsigned Op,
-                         SmallVectorImpl<MCFixup> &Fixups) const;
-
   unsigned getRegisterListOpValue(const MCInst &MI, unsigned Op,
                                   SmallVectorImpl<MCFixup> &Fixups) const;
   unsigned getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op,
@@ -1304,17 +1301,6 @@ getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op,
   return lsb | (msb << 5);
 }
 
-unsigned ARMMCCodeEmitter::
-getMsbOpValue(const MCInst &MI, unsigned Op,
-              SmallVectorImpl<MCFixup> &Fixups) const {
-  // MSB - 5 bits.
-  uint32_t lsb = MI.getOperand(Op-1).getImm();
-  uint32_t width = MI.getOperand(Op).getImm();
-  uint32_t msb = lsb+width-1;
-  assert (width != 0 && msb < 32 && "Illegal bit width!");
-  return msb;
-}
-
 unsigned ARMMCCodeEmitter::
 getRegisterListOpValue(const MCInst &MI, unsigned Op,
                        SmallVectorImpl<MCFixup> &Fixups) const {
-- 
2.34.1