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/test/java/de/platon42/intellij/plugins/m68k/inspections/AbstractInspectionTest.kt

@@ -11,6 +11,7 @@ import org.junit.jupiter.api.extension.ExtendWith
 @ExtendWith(LightCodeInsightExtension::class)
 @TestDataPath("src/test/resources/inspections")
 abstract class AbstractInspectionTest : AbstractM68kTest() {
+
     protected fun assertHighlightings(myFixture: CodeInsightTestFixture, count: Int, snippet: String) {
         assertThat(myFixture.doHighlighting())
             .areExactly(count, Condition({ it.description?.contains(snippet) ?: false }, "containing"))

src/test/java/de/platon42/intellij/plugins/m68k/inspections/M68kDeadWriteInspectionTest.kt

@@ -0,0 +1,157 @@
+package de.platon42.intellij.plugins.m68k.inspections
+
+import com.intellij.testFramework.fixtures.CodeInsightTestFixture
+import de.platon42.intellij.jupiter.MyFixture
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+
+internal class M68kDeadWriteInspectionTest : AbstractInspectionTest() {
+
+    @Test
+    internal fun find_direct_dead_write_to_register(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    add.l   d0,d2
+    moveq.l #123,d1
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d1 is overwritten later without being used")
+    }
+
+    @Test
+    internal fun find_direct_dead_write_to_register_with_modification(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    add.l   d0,d1
+    moveq.l #123,d1
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d1 is overwritten later without being used")
+    }
+
+    @Test
+    internal fun no_dead_write_to_register_due_to_part_modification(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    add.b   d1,d0
+    moveq.l #123,d1
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun use_of_condition_code_causes_weak_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    scc     d0
+    moveq.l #123,d1
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d1 is overwritten later (only CC evaluated?)")
+    }
+
+    @Test
+    internal fun use_of_conditional_instruction_for_non_conditional_causes_full_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    st      d0
+    moveq.l #123,d1
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d1 is overwritten later without being used")
+    }
+
+    @Test
+    internal fun use_of_condition_code_after_modification_causes_no_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    add.b   d0,d1
+    seq     .foo
+    moveq.l #123,d1
+.foo
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun use_of_control_flow_causes_no_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    add.b   d0,d1
+    bra.s   .foo
+    moveq.l #123,d1
+.foo
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun movem_can_cause_multiple_warnings(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    movem.l (a0),d0-d7
+    add.l   d0,d1
+    moveq.l #123,d3
+    clr.l   #123,d6
+    movem.l (a0),d5-d7
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d5 is overwritten later without being used")
+        assertHighlightings(myFixture, 1, "Register d6 is overwritten later without being used")
+        assertHighlightings(myFixture, 1, "Register d7 is overwritten later without being used")
+    }
+
+    @Test
+    internal fun overwrite_in_same_instruction_with_read_causes_no_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.w  #123,d3
+    move.w  (a0,d3.w),d3
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun partial_overwrite_in_causes_no_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.w  #123,d3
+    move.b  d2,d3
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun oversized_overwrite_in_causes_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.w  #123,d3
+    move.l  d2,d3
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d3 is overwritten later without being used")
+    }
+}