AsmPrinter: Remove pointless code in inline asm emission

This was scanning through def operands looking for the
symbol operand. This is pointless because the symbol is always
the first operand as enforced by the verifier, and all operands
are implicit.

Author: arsenm

llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp

@@ -330,16 +330,8 @@ static void EmitInlineAsmStr(const char *AsmStr, const MachineInstr *MI,
 void AsmPrinter::emitInlineAsm(const MachineInstr *MI) const {
   assert(MI->isInlineAsm() && "printInlineAsm only works on inline asms");
 
-  // Count the number of register definitions to find the asm string.
-  unsigned NumDefs = 0;
-  for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
-       ++NumDefs)
-    assert(NumDefs != MI->getNumOperands()-2 && "No asm string?");
-
-  assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
-
   // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
-  const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
+  const char *AsmStr = MI->getOperand(0).getSymbolName();
 
   // If this asmstr is empty, just print the #APP/#NOAPP markers.
   // These are useful to see where empty asm's wound up.