parser: asm: add support for memory clobbers (#9618)

vlib/v/parser/parser.v

@@ -1008,20 +1008,22 @@ fn (mut p Parser) asm_stmt(is_top_level bool) ast.AsmStmt {
 				p.scope = scope
 				p.check(.semicolon)
 				for p.tok.kind == .name {
-					reg := p.reg_or_alias()
+					reg := ast.AsmRegister{
+						name: p.tok.lit
+						typ: 0
+						size: -1
+					}
+					p.check(.name)
 
 					mut comments := []ast.Comment{}
 					for p.tok.kind == .comment {
 						comments << p.comment()
 					}
-					if reg is ast.AsmRegister {
-						clobbered << ast.AsmClobbered{
-							reg: reg
-							comments: comments
-						}
-					} else {
-						p.error('not a register: $reg')
+					clobbered << ast.AsmClobbered{
+						reg: reg
+						comments: comments
 					}
+
 					if p.tok.kind in [.rcbr, .semicolon] {
 						break
 					}

vlib/v/tests/assembly/asm_test.amd64.v

@@ -92,6 +92,7 @@ fn test_inline_asm() {
 		addq [in_data + rcx * 4 + 0], 2
 		; ; c (n.len - 1) // c is counter (loop) register
 		  r (n.data) as in_data
+		; memory
 	}
 	assert n == [7, 11, 2, 6]