From: Owen Anderson <resistor@mac.com>
Date: Wed, 2 Nov 2011 17:46:18 +0000 (+0000)
Subject: The rules disallowing single-register reglist operands only apply to the POP alias... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=244006db5c4d48878dc5fdc86976acdaff96cfaa;p=oota-llvm.git

The rules disallowing single-register reglist operands only apply to the POP alias, not to LDM/STM instructions.  Revert r143552.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143553 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
index 8dab1531321..6927d2d053c 100644
--- a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
+++ b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
@@ -1111,11 +1111,7 @@ static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
   }
 
   // Empty register lists are not allowed.
-  uint32_t popcnt = CountPopulation_32(Val);
-  if (popcnt == 0) return MCDisassembler::Fail;
-  // and one-register lists are unpredictable.
-  else if (popcnt == 1) Check(S, MCDisassembler::SoftFail);
-
+  if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
   for (unsigned i = 0; i < 16; ++i) {
     if (Val & (1 << i)) {
       if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))