From 95b00d8003ac8f801212149b350f36a6649b1b86 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Mon, 12 Jun 2023 20:27:43 +0100
Subject: Add global definition

---
 .../compiler/backends/llvm/ir/LlvmIrSerializer.java | 21 ++++++++++++++++++++-
 .../backends/llvm/ir/ast/LlvmGlobalDefinition.java  | 13 +++++++++++++
 .../backends/llvm/ir/ast/LlvmTopLevelEntity.java    |  2 +-
 3 files changed, 34 insertions(+), 2 deletions(-)
 create mode 100644 src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/LlvmGlobalDefinition.java

(limited to 'src/main/java')

diff --git a/src/main/java/org/shedlang/compiler/backends/llvm/ir/LlvmIrSerializer.java b/src/main/java/org/shedlang/compiler/backends/llvm/ir/LlvmIrSerializer.java
index 9c6ecc55..4846f7ed 100644
--- a/src/main/java/org/shedlang/compiler/backends/llvm/ir/LlvmIrSerializer.java
+++ b/src/main/java/org/shedlang/compiler/backends/llvm/ir/LlvmIrSerializer.java
@@ -1,6 +1,8 @@
 package org.shedlang.compiler.backends.llvm.ir;
 
 import org.shedlang.compiler.backends.llvm.ir.ast.LlvmBasicBlock;
+import org.shedlang.compiler.backends.llvm.ir.ast.LlvmFunctionDefinition;
+import org.shedlang.compiler.backends.llvm.ir.ast.LlvmGlobalDefinition;
 import org.shedlang.compiler.backends.llvm.ir.ast.LlvmParam;
 import org.shedlang.compiler.backends.llvm.ir.ast.LlvmTopLevelEntity;
 import org.shedlang.compiler.backends.llvm.ir.ast.instructions.LlvmAdd;
@@ -85,7 +87,24 @@ public class LlvmIrSerializer {
     }
 
     public static void serializeTopLevelEntity(LlvmTopLevelEntity entity, StringBuilder builder) {
-
+        switch (entity) {
+            case LlvmFunctionDefinition functionDefinition -> {
+            }
+            case LlvmGlobalDefinition globalDefinition -> {
+                builder.append("@");
+                builder.append(globalDefinition.name());
+                builder.append(" = ");
+                if (globalDefinition.unnamedAddr()) {
+                    builder.append("unnamed_addr ");
+                }
+                builder.append(globalDefinition.constant() ? "constant" : "global");
+                builder.append(" ");
+                serializeType(globalDefinition.type(), builder);
+                builder.append(" ");
+                serializeOperand(globalDefinition.value(), builder);
+                builder.append("\n");
+            }
+        }
     }
 
     public static void serializeType(LlvmType type, StringBuilder builder) {
diff --git a/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/LlvmGlobalDefinition.java b/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/LlvmGlobalDefinition.java
new file mode 100644
index 00000000..d7adb1e1
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/LlvmGlobalDefinition.java
@@ -0,0 +1,13 @@
+package org.shedlang.compiler.backends.llvm.ir.ast;
+
+import org.shedlang.compiler.backends.llvm.ir.ast.operands.LlvmOperand;
+import org.shedlang.compiler.backends.llvm.ir.ast.types.LlvmType;
+
+public record LlvmGlobalDefinition(
+    String name,
+    LlvmType type,
+    LlvmOperand value,
+    boolean constant,
+    boolean unnamedAddr
+) implements LlvmTopLevelEntity {
+}
diff --git a/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/LlvmTopLevelEntity.java b/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/LlvmTopLevelEntity.java
index 96287920..86b3efc3 100644
--- a/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/LlvmTopLevelEntity.java
+++ b/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/LlvmTopLevelEntity.java
@@ -1,4 +1,4 @@
 package org.shedlang.compiler.backends.llvm.ir.ast;
 
-public sealed interface LlvmTopLevelEntity permits LlvmFunctionDefinition {
+public sealed interface LlvmTopLevelEntity permits LlvmFunctionDefinition, LlvmGlobalDefinition {
 }
-- 
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