Allow label+offset combination for relocation

Author: e-kud

llvm/lib/Target/X86/AsmParser/X86Operand.h

@@ -421,12 +421,11 @@ struct X86Operand final : public MCParsedAsmOperand {
   bool isDispImm8() const {
     if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemDisp()))
       return isImmSExti64i8Value(CE->getValue());
-    return false;
+    return true;
   }
 
   bool isAbsMem8() const {
-    return isAbsMem() && isMem8() &&
-           (isa<MCSymbolRefExpr>(getMemDisp()) || isDispImm8());
+    return isAbsMem() && isMem8() && isDispImm8();
   }
 
   bool isMemUseUpRegs() const override { return UseUpRegs; }

llvm/test/MC/X86/intel-syntax.s

@@ -2,6 +2,9 @@
 // RUN: FileCheck < %t %s
 // RUN: FileCheck --check-prefix=CHECK-STDERR < %t.err %s
 
+_nop_label:
+	nop
+
 _test:
 	xor	EAX, EAX
 	ret
@@ -825,6 +828,9 @@ fucomip st, st(2)
 // CHECK: fcompi  %st(2)
 // CHECK: fucompi  %st(2)
 
+jrcxz _nop_label
+jecxz _nop_label + 1
+
 loopz _foo
 loopnz _foo
 // CHECK: loope _foo

llvm/test/MC/X86/validate-inst-intel.s

@@ -14,9 +14,9 @@
 # CHECK:            ^
 
 	.text
-	loop BYTE PTR [SYM+4]
+	loop WORD PTR [SYM+4]
 # CHECK: error: invalid operand for instruction
-# CHECK:	loop BYTE PTR [SYM+4]
+# CHECK:	loop WORD PTR [SYM+4]
 # CHECK:        ^
 
 	.text