[X86][AsmParser] Don't allow X86::DX in CheckBaseRegAndIndexRegAndScale.

This was here because out and in instructions allow '(%dx)' even though its not a memory reference. To handle this we build a special operand for the DX register reference before we get to the call to CheckBaseRegAndIndexRegAndScale. So we no longer need this special case.

llvm-svn: 350483

1 files changed, 1 insertions, 2 deletions

diff --git a/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp b/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp
index 4801078925c..8f7b24f89bf 100644
--- a/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp
+++ b/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp
@@ -1011,8 +1011,7 @@ static bool CheckBaseRegAndIndexRegAndScale(unsigned BaseReg, unsigned IndexReg,
   // and then only in non-64-bit modes.
   if (X86MCRegisterClasses[X86::GR16RegClassID].contains(BaseReg) &&
       (Is64BitMode || (BaseReg != X86::BX && BaseReg != X86::BP &&
-                       BaseReg != X86::SI && BaseReg != X86::DI)) &&
-      BaseReg != X86::DX) {
+                       BaseReg != X86::SI && BaseReg != X86::DI))) {
     ErrMsg = "invalid 16-bit base register";
     return true;
   }