doc: sample: update sample ir files

doc/sample/ir/dominance-test.mie

@@ -0,0 +1,30 @@
+~func.func() ({
+^R:
+	%0 = ~arith.constant() {value = 0 : i32} : () -> i32
+	~cf.br-cond(%0) [ ^A, ^B, ^C ] : (i32) -> ()
+
+^A:
+	~cf.br() [ ^D ] : () -> ()
+^B:
+	~cf.br-cond(%0) [ ^D, ^A, ^E ] : (i32) -> ()
+^C:
+	~cf.br-cond(%0) [ ^G, ^F ] : (i32) -> ()
+^D:
+	~cf.br() [ ^L ] : () -> ()
+^E:
+	~cf.br() [ ^H ] : () -> ()
+^F:
+	~cf.br() [ ^I ] : () -> ()
+^G:
+	~cf.br-cond(%0) [ ^I, ^J ] : (i32) -> ()
+^H:
+	~cf.br-cond(%0) [ ^E, ^K ] : (i32) -> ()
+^I:
+	~cf.br() [ ^K ] : () -> ()
+^J:
+	~cf.br() [ ^I ] : () -> ()
+^K:
+	~cf.br-cond(%0) [ ^R, ^I ] : (i32) -> ()
+^L:
+	~cf.br() [ ^H ] : () -> ()
+}) {sym_name = "test", function_type = () -> () } : () -> ()