Refactored stuff.

Added control flow information to ISA.
In ISA exg is no longer treated as setting a definitive value.
Added inspection find dead writes to registers.

src/main/resources/META-INF/plugin.xml

@@ -50,6 +50,9 @@
         <localInspection implementationClass="de.platon42.intellij.plugins.m68k.inspections.M68kSyntaxInspection"
                          displayName="Assembly instruction validity" groupName="M68k"
                          enabledByDefault="true" level="ERROR"/>
+        <localInspection implementationClass="de.platon42.intellij.plugins.m68k.inspections.M68kDeadWriteInspection"
+                         displayName="Dead writes to registers" groupName="M68k"
+                         enabledByDefault="true" level="WARNING"/>
     </extensions>
 
     <actions>

src/main/resources/inspectionDescriptions/M68kDeadWrite.html

@@ -0,0 +1,11 @@
+<html>
+<body>
+Finds dead writes to registers, i.e. writes that will not have any effect.
+
+Issues a weak warning if the instruction affects only condition codes that are later tested.
+
+Analysis is terminated at the next global label or instruction that reads the register or changes control flow.
+<!-- tooltip end -->
+<p>Note: As there is no evaluation of macros right now, the inspection might report some false positives.</p>
+</body>
+</html>