From 47f3094508b59f030cb26d39ac4d2dccdf3414f2 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Tue, 13 Jun 2023 20:06:26 +0100
Subject: Add LLVM getelementptr instruction

---
 .../compiler/backends/llvm/ir/LlvmIrSerializer.java      | 11 +++++++++++
 .../llvm/ir/ast/instructions/LlvmGetElementPtr.java      | 16 ++++++++++++++++
 .../llvm/ir/ast/instructions/LlvmInstruction.java        |  2 +-
 3 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/instructions/LlvmGetElementPtr.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 cef8f005..11569f74 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
@@ -41,6 +41,17 @@ public class LlvmIrSerializer {
             }
             case LlvmCall call -> {
             }
+            case LlvmGetElementPtr getElementPtr -> {
+                serializeVariable(getElementPtr.target(), builder);
+                builder.append(" = getelementptr ");
+                serializeType(getElementPtr.pointerType().elementType(), builder);
+                builder.append(", ptr ");
+                serializeOperand(getElementPtr.pointer(), builder);
+                for (var index : getElementPtr.indexes()) {
+                    builder.append(", ");
+                    serializeTypedOperand(index, builder);
+                }
+            }
         }
     }
 
diff --git a/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/instructions/LlvmGetElementPtr.java b/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/instructions/LlvmGetElementPtr.java
new file mode 100644
index 00000000..ad9f1ced
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/instructions/LlvmGetElementPtr.java
@@ -0,0 +1,16 @@
+package org.shedlang.compiler.backends.llvm.ir.ast.instructions;
+
+import org.shedlang.compiler.backends.llvm.ir.ast.operands.LlvmOperand;
+import org.shedlang.compiler.backends.llvm.ir.ast.operands.LlvmTypedOperand;
+import org.shedlang.compiler.backends.llvm.ir.ast.operands.LlvmVariable;
+import org.shedlang.compiler.backends.llvm.ir.ast.types.LlvmTypePointer;
+
+import java.util.List;
+
+public record LlvmGetElementPtr(
+    LlvmVariable target,
+    LlvmTypePointer pointerType,
+    LlvmOperand pointer,
+    List<LlvmTypedOperand> indexes
+) implements LlvmInstruction {
+}
diff --git a/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/instructions/LlvmInstruction.java b/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/instructions/LlvmInstruction.java
index 2e0ffb23..48d90ed4 100644
--- a/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/instructions/LlvmInstruction.java
+++ b/src/main/java/org/shedlang/compiler/backends/llvm/ir/ast/instructions/LlvmInstruction.java
@@ -1,4 +1,4 @@
 package org.shedlang.compiler.backends.llvm.ir.ast.instructions;
 
-public sealed interface LlvmInstruction permits LlvmAdd, LlvmCall {
+public sealed interface LlvmInstruction permits LlvmAdd, LlvmCall, LlvmGetElementPtr {
 }
-- 
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