Add int-equals instruction

3 files changed, 14 insertions, 1 deletions

diff --git a/src/main/java/org/shedlang/compiler/stackir/InstructionSerializer.java b/src/main/java/org/shedlang/compiler/stackir/InstructionSerializer.java
index ef832b90..ac58103c 100644
--- a/src/main/java/org/shedlang/compiler/stackir/InstructionSerializer.java
+++ b/src/main/java/org/shedlang/compiler/stackir/InstructionSerializer.java
@@ -81,6 +81,9 @@ public class InstructionSerializer {
                     treeString(fieldLoad.namespaceName().toString()),
                     treeString(fieldLoad.fieldName())
                 );
+
+            case IntEqualsInstruction intEquals ->
+                treeList(treeIdentifier("int-equals"));
             
             case LocalLoadInstruction localLoadInstruction ->
                 treeList(
diff --git a/src/main/java/org/shedlang/compiler/stackir/instructions/Instruction.java b/src/main/java/org/shedlang/compiler/stackir/instructions/Instruction.java
index 6a21404c..f3c8a30a 100644
--- a/src/main/java/org/shedlang/compiler/stackir/instructions/Instruction.java
+++ b/src/main/java/org/shedlang/compiler/stackir/instructions/Instruction.java
@@ -3,7 +3,7 @@ package org.shedlang.compiler.stackir.instructions;
 import org.shedlang.compiler.sources.Source;
 
 public sealed interface Instruction
-    permits CallInstruction, DefineFunctionInstruction, DiscardInstruction, FieldLoadInstruction, LocalLoadInstruction, LocalStoreInstruction, NamespaceFieldStoreInstruction, NamespaceImportInstruction, PushBoolInstruction, PushIntInstruction, PushStringInstruction, PushUnitInstruction, ReturnInstruction {
+    permits CallInstruction, DefineFunctionInstruction, DiscardInstruction, FieldLoadInstruction, IntEqualsInstruction, LocalLoadInstruction, LocalStoreInstruction, NamespaceFieldStoreInstruction, NamespaceImportInstruction, PushBoolInstruction, PushIntInstruction, PushStringInstruction, PushUnitInstruction, ReturnInstruction {
 
     Source source();
 }
diff --git a/src/main/java/org/shedlang/compiler/stackir/instructions/IntEqualsInstruction.java b/src/main/java/org/shedlang/compiler/stackir/instructions/IntEqualsInstruction.java
new file mode 100644
index 00000000..623db1c4
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/stackir/instructions/IntEqualsInstruction.java
@@ -0,0 +1,10 @@
+package org.shedlang.compiler.stackir.instructions;
+
+import org.shedlang.compiler.sources.Source;
+
+/**
+ * Pop two values from the stack, compare them as Ints, and push a Bool onto
+ * the stack: true if equal, false if not equal.
+ */
+public record IntEqualsInstruction(Source source) implements Instruction {
+}