[mips] Restrict certain trap instructions for micromipsr6

[smaksimovic]

Summary

Instructions removed from micromipsr6:
teqi, tgei, tgeiu, tlti, tltiu, tnei

[sdardis]

LGTM.

lib/Target/Mips/MicroMipsInstrInfo.td

let DecoderNamespace = "MicroMips", Predicates = [InMicroMips] in {
   def TEQ_MM  : MMRel, TEQ_FT<"teq", GPR32Opnd, uimm4, II_TEQ>, TEQ_FM_MM<0x0>;
   def TGE_MM  : MMRel, TEQ_FT<"tge", GPR32Opnd, uimm4, II_TGE>, TEQ_FM_MM<0x08>;
   def TGEU_MM : MMRel, TEQ_FT<"tgeu", GPR32Opnd, uimm4, II_TGEU>,
                 TEQ_FM_MM<0x10>;
   def TLT_MM  : MMRel, TEQ_FT<"tlt", GPR32Opnd, uimm4, II_TLT>, TEQ_FM_MM<0x20>;
   def TLTU_MM : MMRel, TEQ_FT<"tltu", GPR32Opnd, uimm4, II_TLTU>,
                 TEQ_FM_MM<0x28>;
   def TNE_MM  : MMRel, TEQ_FT<"tne", GPR32Opnd, uimm4, II_TNE>, TEQ_FM_MM<0x30>;
-
-  def TEQI_MM  : MMRel, TEQI_FT<"teqi", GPR32Opnd, II_TEQI>, TEQI_FM_MM<0x0e>;
-  def TGEI_MM  : MMRel, TEQI_FT<"tgei", GPR32Opnd, II_TGEI>, TEQI_FM_MM<0x09>;
+}
+let DecoderNamespace = "MicroMips" in {
+  def TEQI_MM  : MMRel, TEQI_FT<"teqi", GPR32Opnd, II_TEQI>, TEQI_FM_MM<0x0e>,
+                 ISA_MICROMIPS32_NOT_MIPS32R6;
+  def TGEI_MM  : MMRel, TEQI_FT<"tgei", GPR32Opnd, II_TGEI>, TEQI_FM_MM<0x09>,
+                 ISA_MICROMIPS32_NOT_MIPS32R6;
   def TGEIU_MM : MMRel, TEQI_FT<"tgeiu", GPR32Opnd, II_TGEIU>,
-                 TEQI_FM_MM<0x0b>;
-  def TLTI_MM  : MMRel, TEQI_FT<"tlti", GPR32Opnd, II_TLTI>, TEQI_FM_MM<0x08>;
+                 TEQI_FM_MM<0x0b>, ISA_MICROMIPS32_NOT_MIPS32R6;
+  def TLTI_MM  : MMRel, TEQI_FT<"tlti", GPR32Opnd, II_TLTI>, TEQI_FM_MM<0x08>,
+                 ISA_MICROMIPS32_NOT_MIPS32R6;
   def TLTIU_MM : MMRel, TEQI_FT<"tltiu", GPR32Opnd, II_TTLTIU>,
-                 TEQI_FM_MM<0x0a>;
-  def TNEI_MM  : MMRel, TEQI_FT<"tnei", GPR32Opnd, II_TNEI>, TEQI_FM_MM<0x0c>;
-
+                 TEQI_FM_MM<0x0a>, ISA_MICROMIPS32_NOT_MIPS32R6;
+  def TNEI_MM  : MMRel, TEQI_FT<"tnei", GPR32Opnd, II_TNEI>, TEQI_FM_MM<0x0c>,
+                 ISA_MICROMIPS32_NOT_MIPS32R6;
+}
+let DecoderNamespace = "MicroMips", Predicates = [InMicroMips] in {
   /// Load-linked, Store-conditional
   def LL_MM : LLBaseMM<"ll", GPR32Opnd>, LL_FM_MM<0x3>;
   def SC_MM : SCBaseMM<"sc", GPR32Opnd>, LL_FM_MM<0xb>;
 }
 let DecoderNamespace = "MicroMips" in {
   def LLE_MM : MMRel, LLEBaseMM<"lle", GPR32Opnd>, LLE_FM_MM<0x6>,
                ISA_MICROMIPS, ASE_EVA;
   def SCE_MM : MMRel, SCEBaseMM<"sce", GPR32Opnd>, LLE_FM_MM<0xA>,

test/MC/Mips/micromips32r6/invalid.s

# RUN: FileCheck %s < %t1
   tgeu $8, $9, $2          # CHECK: :[[@LINE]]:16: error: expected 4-bit unsigned immediate
   tgeu $8, $9, -1          # CHECK: :[[@LINE]]:16: error: expected 4-bit unsigned immediate
   tlt $8, $9, $2           # CHECK: :[[@LINE]]:15: error: expected 4-bit unsigned immediate
   tlt $8, $9, -1           # CHECK: :[[@LINE]]:15: error: expected 4-bit unsigned immediate
   tltu $8, $9, $2          # CHECK: :[[@LINE]]:16: error: expected 4-bit unsigned immediate
   tltu $8, $9, -1          # CHECK: :[[@LINE]]:16: error: expected 4-bit unsigned immediate
   tne $8, $9, $2           # CHECK: :[[@LINE]]:15: error: expected 4-bit unsigned immediate
   tne $8, $9, -1           # CHECK: :[[@LINE]]:15: error: expected 4-bit unsigned immediate
+  teqi $4, 5               # CHECK: :[[@LINE]]:{{[0-9]+}}: error: instruction requires a CPU feature not currently enabled
+  tgei $4, 5               # CHECK: :[[@LINE]]:{{[0-9]+}}: error: instruction requires a CPU feature not currently enabled
+  tgeiu $4, 5              # CHECK: :[[@LINE]]:{{[0-9]+}}: error: instruction requires a CPU feature not currently enabled
+  tlti $4, 5               # CHECK: :[[@LINE]]:{{[0-9]+}}: error: instruction requires a CPU feature not currently enabled
+  tltiu $4, 5              # CHECK: :[[@LINE]]:{{[0-9]+}}: error: instruction requires a CPU feature not currently enabled
+  tnei $4, 5               # CHECK: :[[@LINE]]:{{[0-9]+}}: error: instruction requires a CPU feature not currently enabled
   syscall -1               # CHECK: :[[@LINE]]:11: error: expected 10-bit unsigned immediate
   syscall $4               # CHECK: :[[@LINE]]:11: error: expected 10-bit unsigned immediate
   ldc2 $1, 1023($32)       # CHECK: :[[@LINE]]:12: error: expected memory with 11-bit signed offset
   lwc2 $1, 16($32)         # CHECK: :[[@LINE]]:12: error: expected memory with 11-bit signed offset
   sdc2 $1, 8($32)          # CHECK: :[[@LINE]]:12: error: expected memory with 11-bit signed offset
   swc2 $1, 777($32)        # CHECK: :[[@LINE]]:12: error: expected memory with 11-bit signed offset