Index: llvm/trunk/lib/Target/ARM/ARMInstrInfo.td
===================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrInfo.td
+++ llvm/trunk/lib/Target/ARM/ARMInstrInfo.td
@@ -388,6 +388,9 @@
 // Immediate operands with a shared generic asm render method.
 class ImmAsmOperand : AsmOperandClass { let RenderMethod = "addImmOperands"; }
 
+// Operands that are part of a memory addressing mode.
+class MemOperand : Operand<i32> { let OperandType = "OPERAND_MEMORY"; }
+
 // Branch target.
 // FIXME: rename brtarget to t2_brtarget
 def brtarget : Operand<OtherVT> {
@@ -790,7 +793,7 @@
 // addrmode_imm12 := reg +/- imm12
 //
 def MemImm12OffsetAsmOperand : AsmOperandClass { let Name = "MemImm12Offset"; }
-class AddrMode_Imm12 : Operand<i32>,
+class AddrMode_Imm12 : MemOperand,
                      ComplexPattern<i32, 2, "SelectAddrModeImm12", []> {
   // 12-bit immediate operand. Note that instructions using this encode
   // #0 and #-0 differently. We flag #-0 as the magic value INT32_MIN. All other
@@ -813,7 +816,7 @@
 // ldst_so_reg := reg +/- reg shop imm
 //
 def MemRegOffsetAsmOperand : AsmOperandClass { let Name = "MemRegOffset"; }
-def ldst_so_reg : Operand<i32>,
+def ldst_so_reg : MemOperand,
                   ComplexPattern<i32, 3, "SelectLdStSOReg", []> {
   let EncoderMethod = "getLdStSORegOpValue";
   // FIXME: Simplify the printer
@@ -829,7 +832,7 @@
 //  {8}       1 is imm8 is non-negative. 0 otherwise.
 //  {7-0}     [0,255] imm8 value.
 def PostIdxImm8AsmOperand : AsmOperandClass { let Name = "PostIdxImm8"; }
-def postidx_imm8 : Operand<i32> {
+def postidx_imm8 : MemOperand {
   let PrintMethod = "printPostIdxImm8Operand";
   let ParserMatchClass = PostIdxImm8AsmOperand;
   let MIOperandInfo = (ops i32imm);
@@ -841,7 +844,7 @@
 //  {8}       1 is imm8 is non-negative. 0 otherwise.
 //  {7-0}     [0,255] imm8 value, scaled by 4.
 def PostIdxImm8s4AsmOperand : AsmOperandClass { let Name = "PostIdxImm8s4"; }
-def postidx_imm8s4 : Operand<i32> {
+def postidx_imm8s4 : MemOperand {
   let PrintMethod = "printPostIdxImm8s4Operand";
   let ParserMatchClass = PostIdxImm8s4AsmOperand;
   let MIOperandInfo = (ops i32imm);
@@ -854,7 +857,7 @@
   let Name = "PostIdxReg";
   let ParserMethod = "parsePostIdxReg";
 }
-def postidx_reg : Operand<i32> {
+def postidx_reg : MemOperand {
   let EncoderMethod = "getPostIdxRegOpValue";
   let DecoderMethod = "DecodePostIdxReg";
   let PrintMethod = "printPostIdxRegOperand";
@@ -869,7 +872,7 @@
 // FIXME: addrmode2 should be refactored the rest of the way to always
 // use explicit imm vs. reg versions above (addrmode_imm12 and ldst_so_reg).
 def AddrMode2AsmOperand : AsmOperandClass { let Name = "AddrMode2"; }
-def addrmode2 : Operand<i32>,
+def addrmode2 : MemOperand,
                 ComplexPattern<i32, 3, "SelectAddrMode2", []> {
   let EncoderMethod = "getAddrMode2OpValue";
   let PrintMethod = "printAddrMode2Operand";
@@ -881,7 +884,7 @@
   let Name = "PostIdxRegShifted";
   let ParserMethod = "parsePostIdxReg";
 }
-def am2offset_reg : Operand<i32>,
+def am2offset_reg : MemOperand,
                 ComplexPattern<i32, 2, "SelectAddrMode2OffsetReg",
                 [], [SDNPWantRoot]> {
   let EncoderMethod = "getAddrMode2OffsetOpValue";
@@ -894,7 +897,7 @@
 // FIXME: am2offset_imm should only need the immediate, not the GPR. Having
 // the GPR is purely vestigal at this point.
 def AM2OffsetImmAsmOperand : AsmOperandClass { let Name = "AM2OffsetImm"; }
-def am2offset_imm : Operand<i32>,
+def am2offset_imm : MemOperand,
                 ComplexPattern<i32, 2, "SelectAddrMode2OffsetImm",
                 [], [SDNPWantRoot]> {
   let EncoderMethod = "getAddrMode2OffsetOpValue";
@@ -909,7 +912,7 @@
 //
 // FIXME: split into imm vs. reg versions.
 def AddrMode3AsmOperand : AsmOperandClass { let Name = "AddrMode3"; }
-class AddrMode3 : Operand<i32>,
+class AddrMode3 : MemOperand,
                   ComplexPattern<i32, 3, "SelectAddrMode3", []> {
   let EncoderMethod = "getAddrMode3OpValue";
   let ParserMatchClass = AddrMode3AsmOperand;
@@ -932,7 +935,7 @@
   let Name = "AM3Offset";
   let ParserMethod = "parseAM3Offset";
 }
-def am3offset : Operand<i32>,
+def am3offset : MemOperand,
                 ComplexPattern<i32, 2, "SelectAddrMode3Offset",
                                [], [SDNPWantRoot]> {
   let EncoderMethod = "getAddrMode3OffsetOpValue";
@@ -951,7 +954,7 @@
 // addrmode5 := reg +/- imm8*4
 //
 def AddrMode5AsmOperand : AsmOperandClass { let Name = "AddrMode5"; }
-class AddrMode5 : Operand<i32>,
+class AddrMode5 : MemOperand,
                   ComplexPattern<i32, 2, "SelectAddrMode5", []> {
   let EncoderMethod = "getAddrMode5OpValue";
   let DecoderMethod = "DecodeAddrMode5Operand";
@@ -970,7 +973,7 @@
 // addrmode6 := reg with optional alignment
 //
 def AddrMode6AsmOperand : AsmOperandClass { let Name = "AlignedMemory"; }
-def addrmode6 : Operand<i32>,
+def addrmode6 : MemOperand,
                 ComplexPattern<i32, 2, "SelectAddrMode6", [], [SDNPWantParent]>{
   let PrintMethod = "printAddrMode6Operand";
   let MIOperandInfo = (ops GPR:$addr, i32imm:$align);
@@ -979,7 +982,7 @@
   let ParserMatchClass = AddrMode6AsmOperand;
 }
 
-def am6offset : Operand<i32>,
+def am6offset : MemOperand,
                 ComplexPattern<i32, 1, "SelectAddrMode6Offset",
                                [], [SDNPWantRoot]> {
   let PrintMethod = "printAddrMode6OffsetOperand";
@@ -990,7 +993,7 @@
 
 // Special version of addrmode6 to handle alignment encoding for VST1/VLD1
 // (single element from one lane) for size 32.
-def addrmode6oneL32 : Operand<i32>,
+def addrmode6oneL32 : MemOperand,
                 ComplexPattern<i32, 2, "SelectAddrMode6", [], [SDNPWantParent]>{
   let PrintMethod = "printAddrMode6Operand";
   let MIOperandInfo = (ops GPR:$addr, i32imm);
@@ -998,7 +1001,7 @@
 }
 
 // Base class for addrmode6 with specific alignment restrictions.
-class AddrMode6Align : Operand<i32>,
+class AddrMode6Align : MemOperand,
                 ComplexPattern<i32, 2, "SelectAddrMode6", [], [SDNPWantParent]>{
   let PrintMethod = "printAddrMode6Operand";
   let MIOperandInfo = (ops GPR:$addr, i32imm:$align);
@@ -1074,7 +1077,7 @@
 
 // Special version of addrmode6 to handle alignment encoding for VLD-dup
 // instructions, specifically VLD4-dup.
-def addrmode6dup : Operand<i32>,
+def addrmode6dup : MemOperand,
                 ComplexPattern<i32, 2, "SelectAddrMode6", [], [SDNPWantParent]>{
   let PrintMethod = "printAddrMode6Operand";
   let MIOperandInfo = (ops GPR:$addr, i32imm);
@@ -1085,7 +1088,7 @@
 }
 
 // Base class for addrmode6dup with specific alignment restrictions.
-class AddrMode6DupAlign : Operand<i32>,
+class AddrMode6DupAlign : MemOperand,
                 ComplexPattern<i32, 2, "SelectAddrMode6", [], [SDNPWantParent]>{
   let PrintMethod = "printAddrMode6Operand";
   let MIOperandInfo = (ops GPR:$addr, i32imm);
@@ -1149,7 +1152,7 @@
 
 // addrmodepc := pc + reg
 //
-def addrmodepc : Operand<i32>,
+def addrmodepc : MemOperand,
                  ComplexPattern<i32, 2, "SelectAddrModePC", []> {
   let PrintMethod = "printAddrModePCOperand";
   let MIOperandInfo = (ops GPR, i32imm);
@@ -1158,7 +1161,7 @@
 // addr_offset_none := reg
 //
 def MemNoOffsetAsmOperand : AsmOperandClass { let Name = "MemNoOffset"; }
-def addr_offset_none : Operand<i32>,
+def addr_offset_none : MemOperand,
                        ComplexPattern<i32, 1, "SelectAddrOffsetNone", []> {
   let PrintMethod = "printAddrMode7Operand";
   let DecoderMethod = "DecodeAddrMode7Operand";
Index: llvm/trunk/lib/Target/ARM/ARMInstrThumb.td
===================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrThumb.td
+++ llvm/trunk/lib/Target/ARM/ARMInstrThumb.td
@@ -142,7 +142,7 @@
 
 // t_addrmode_pc := <label> => pc + imm8 * 4
 //
-def t_addrmode_pc : Operand<i32> {
+def t_addrmode_pc : MemOperand {
   let EncoderMethod = "getAddrModePCOpValue";
   let DecoderMethod = "DecodeThumbAddrModePC";
   let PrintMethod = "printThumbLdrLabelOperand";
@@ -153,7 +153,7 @@
 // t_addrmode_rr := reg + reg
 //
 def t_addrmode_rr_asm_operand : AsmOperandClass { let Name = "MemThumbRR"; }
-def t_addrmode_rr : Operand<i32>,
+def t_addrmode_rr : MemOperand,
                     ComplexPattern<i32, 2, "SelectThumbAddrModeRR", []> {
   let EncoderMethod = "getThumbAddrModeRegRegOpValue";
   let PrintMethod = "printThumbAddrModeRROperand";
@@ -169,7 +169,7 @@
 // the reg+imm forms will match instead. This is a horrible way to do that,
 // as it forces tight coupling between the methods, but it's how selectiondag
 // currently works.
-def t_addrmode_rrs1 : Operand<i32>,
+def t_addrmode_rrs1 : MemOperand,
                       ComplexPattern<i32, 2, "SelectThumbAddrModeRI5S1", []> {
   let EncoderMethod = "getThumbAddrModeRegRegOpValue";
   let PrintMethod = "printThumbAddrModeRROperand";
@@ -177,7 +177,7 @@
   let ParserMatchClass = t_addrmode_rr_asm_operand;
   let MIOperandInfo = (ops tGPR:$base, tGPR:$offsreg);
 }
-def t_addrmode_rrs2 : Operand<i32>,
+def t_addrmode_rrs2 : MemOperand,
                       ComplexPattern<i32, 2, "SelectThumbAddrModeRI5S2", []> {
   let EncoderMethod = "getThumbAddrModeRegRegOpValue";
   let DecoderMethod = "DecodeThumbAddrModeRR";
@@ -185,7 +185,7 @@
   let ParserMatchClass = t_addrmode_rr_asm_operand;
   let MIOperandInfo = (ops tGPR:$base, tGPR:$offsreg);
 }
-def t_addrmode_rrs4 : Operand<i32>,
+def t_addrmode_rrs4 : MemOperand,
                       ComplexPattern<i32, 2, "SelectThumbAddrModeRI5S4", []> {
   let EncoderMethod = "getThumbAddrModeRegRegOpValue";
   let DecoderMethod = "DecodeThumbAddrModeRR";
@@ -197,7 +197,7 @@
 // t_addrmode_is4 := reg + imm5 * 4
 //
 def t_addrmode_is4_asm_operand : AsmOperandClass { let Name = "MemThumbRIs4"; }
-def t_addrmode_is4 : Operand<i32>,
+def t_addrmode_is4 : MemOperand,
                      ComplexPattern<i32, 2, "SelectThumbAddrModeImm5S4", []> {
   let EncoderMethod = "getAddrModeISOpValue";
   let DecoderMethod = "DecodeThumbAddrModeIS";
@@ -209,7 +209,7 @@
 // t_addrmode_is2 := reg + imm5 * 2
 //
 def t_addrmode_is2_asm_operand : AsmOperandClass { let Name = "MemThumbRIs2"; }
-def t_addrmode_is2 : Operand<i32>,
+def t_addrmode_is2 : MemOperand,
                      ComplexPattern<i32, 2, "SelectThumbAddrModeImm5S2", []> {
   let EncoderMethod = "getAddrModeISOpValue";
   let DecoderMethod = "DecodeThumbAddrModeIS";
@@ -221,7 +221,7 @@
 // t_addrmode_is1 := reg + imm5
 //
 def t_addrmode_is1_asm_operand : AsmOperandClass { let Name = "MemThumbRIs1"; }
-def t_addrmode_is1 : Operand<i32>,
+def t_addrmode_is1 : MemOperand,
                      ComplexPattern<i32, 2, "SelectThumbAddrModeImm5S1", []> {
   let EncoderMethod = "getAddrModeISOpValue";
   let DecoderMethod = "DecodeThumbAddrModeIS";
@@ -235,7 +235,7 @@
 // FIXME: This really shouldn't have an explicit SP operand at all. It should
 // be implicit, just like in the instruction encoding itself.
 def t_addrmode_sp_asm_operand : AsmOperandClass { let Name = "MemThumbSPI"; }
-def t_addrmode_sp : Operand<i32>,
+def t_addrmode_sp : MemOperand,
                     ComplexPattern<i32, 2, "SelectThumbAddrModeSP", []> {
   let EncoderMethod = "getAddrModeThumbSPOpValue";
   let DecoderMethod = "DecodeThumbAddrModeSP";
Index: llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
===================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
+++ llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
@@ -148,7 +148,7 @@
 
 // t2addrmode_imm12  := reg + imm12
 def t2addrmode_imm12_asmoperand : AsmOperandClass {let Name="MemUImm12Offset";}
-def t2addrmode_imm12 : Operand<i32>,
+def t2addrmode_imm12 : MemOperand,
                        ComplexPattern<i32, 2, "SelectT2AddrModeImm12", []> {
   let PrintMethod = "printAddrModeImm12Operand<false>";
   let EncoderMethod = "getAddrModeImm12OpValue";
@@ -178,7 +178,7 @@
 
 // t2addrmode_posimm8  := reg + imm8
 def MemPosImm8OffsetAsmOperand : AsmOperandClass {let Name="MemPosImm8Offset";}
-def t2addrmode_posimm8 : Operand<i32> {
+def t2addrmode_posimm8 : MemOperand {
   let PrintMethod = "printT2AddrModeImm8Operand<false>";
   let EncoderMethod = "getT2AddrModeImm8OpValue";
   let DecoderMethod = "DecodeT2AddrModeImm8";
@@ -188,7 +188,7 @@
 
 // t2addrmode_negimm8  := reg - imm8
 def MemNegImm8OffsetAsmOperand : AsmOperandClass {let Name="MemNegImm8Offset";}
-def t2addrmode_negimm8 : Operand<i32>,
+def t2addrmode_negimm8 : MemOperand,
                       ComplexPattern<i32, 2, "SelectT2AddrModeImm8", []> {
   let PrintMethod = "printT2AddrModeImm8Operand<false>";
   let EncoderMethod = "getT2AddrModeImm8OpValue";
@@ -199,7 +199,7 @@
 
 // t2addrmode_imm8  := reg +/- imm8
 def MemImm8OffsetAsmOperand : AsmOperandClass { let Name = "MemImm8Offset"; }
-class T2AddrMode_Imm8 : Operand<i32>,
+class T2AddrMode_Imm8 : MemOperand,
                         ComplexPattern<i32, 2, "SelectT2AddrModeImm8", []> {
   let EncoderMethod = "getT2AddrModeImm8OpValue";
   let DecoderMethod = "DecodeT2AddrModeImm8";
@@ -215,7 +215,7 @@
   let PrintMethod = "printT2AddrModeImm8Operand<true>";
 }
 
-def t2am_imm8_offset : Operand<i32>,
+def t2am_imm8_offset : MemOperand,
                        ComplexPattern<i32, 1, "SelectT2AddrModeImm8Offset",
                                       [], [SDNPWantRoot]> {
   let PrintMethod = "printT2AddrModeImm8OffsetOperand";
@@ -225,7 +225,7 @@
 
 // t2addrmode_imm8s4  := reg +/- (imm8 << 2)
 def MemImm8s4OffsetAsmOperand : AsmOperandClass {let Name = "MemImm8s4Offset";}
-class T2AddrMode_Imm8s4 : Operand<i32> {
+class T2AddrMode_Imm8s4 : MemOperand {
   let EncoderMethod = "getT2AddrModeImm8s4OpValue";
   let DecoderMethod = "DecodeT2AddrModeImm8s4";
   let ParserMatchClass = MemImm8s4OffsetAsmOperand;
@@ -241,7 +241,7 @@
 }
 
 def t2am_imm8s4_offset_asmoperand : AsmOperandClass { let Name = "Imm8s4"; }
-def t2am_imm8s4_offset : Operand<i32> {
+def t2am_imm8s4_offset : MemOperand {
   let PrintMethod = "printT2AddrModeImm8s4OffsetOperand";
   let EncoderMethod = "getT2Imm8s4OpValue";
   let DecoderMethod = "DecodeT2Imm8S4";
@@ -251,7 +251,7 @@
 def MemImm0_1020s4OffsetAsmOperand : AsmOperandClass {
   let Name = "MemImm0_1020s4Offset";
 }
-def t2addrmode_imm0_1020s4 : Operand<i32>,
+def t2addrmode_imm0_1020s4 : MemOperand,
                          ComplexPattern<i32, 2, "SelectT2AddrModeExclusive"> {
   let PrintMethod = "printT2AddrModeImm0_1020s4Operand";
   let EncoderMethod = "getT2AddrModeImm0_1020s4OpValue";
@@ -262,7 +262,7 @@
 
 // t2addrmode_so_reg  := reg + (reg << imm2)
 def t2addrmode_so_reg_asmoperand : AsmOperandClass {let Name="T2MemRegOffset";}
-def t2addrmode_so_reg : Operand<i32>,
+def t2addrmode_so_reg : MemOperand,
                         ComplexPattern<i32, 3, "SelectT2AddrModeSoReg", []> {
   let PrintMethod = "printT2AddrModeSoRegOperand";
   let EncoderMethod = "getT2AddrModeSORegOpValue";
@@ -273,13 +273,13 @@
 
 // Addresses for the TBB/TBH instructions.
 def addrmode_tbb_asmoperand : AsmOperandClass { let Name = "MemTBB"; }
-def addrmode_tbb : Operand<i32> {
+def addrmode_tbb : MemOperand {
   let PrintMethod = "printAddrModeTBB";
   let ParserMatchClass = addrmode_tbb_asmoperand;
   let MIOperandInfo = (ops GPR:$Rn, rGPR:$Rm);
 }
 def addrmode_tbh_asmoperand : AsmOperandClass { let Name = "MemTBH"; }
-def addrmode_tbh : Operand<i32> {
+def addrmode_tbh : MemOperand {
   let PrintMethod = "printAddrModeTBH";
   let ParserMatchClass = addrmode_tbh_asmoperand;
   let MIOperandInfo = (ops GPR:$Rn, rGPR:$Rm);