From e2a87d4a022edfa7a7f552af9117c1ac1669cf32 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sat, 22 Jul 2023 11:32:38 +0100
Subject: Add stubbed llvm-patio backend

---
 .../org/shedlang/compiler/backends/Backends.java   |  3 +-
 .../compiler/backends/llvm/LlvmBackend.java        | 39 +++++++++++++++++++---
 .../compiler/backends/llvm/LlvmPatioCodeGen.java   | 10 ++++++
 3 files changed, 47 insertions(+), 5 deletions(-)
 create mode 100644 src/main/java/org/shedlang/compiler/backends/llvm/LlvmPatioCodeGen.java

(limited to 'src/main/java')

diff --git a/src/main/java/org/shedlang/compiler/backends/Backends.java b/src/main/java/org/shedlang/compiler/backends/Backends.java
index f0a75510..02a3e60d 100644
--- a/src/main/java/org/shedlang/compiler/backends/Backends.java
+++ b/src/main/java/org/shedlang/compiler/backends/Backends.java
@@ -9,7 +9,8 @@ public class Backends {
     }
 
     public static final OrderedPMap<String, Backend> BACKENDS = OrderedPMap.<String, Backend>empty()
-        .plus("llvm", new LlvmBackend())
+        .plus("llvm", LlvmBackend.DIRECT)
+        .plus("llvm-patio", LlvmBackend.PATIO)
         .plus("wasm", WasmBackend.DIRECT)
         .plus("wasm-patio", WasmBackend.PATIO);
 }
diff --git a/src/main/java/org/shedlang/compiler/backends/llvm/LlvmBackend.java b/src/main/java/org/shedlang/compiler/backends/llvm/LlvmBackend.java
index 0dead3ac..97cbbf17 100644
--- a/src/main/java/org/shedlang/compiler/backends/llvm/LlvmBackend.java
+++ b/src/main/java/org/shedlang/compiler/backends/llvm/LlvmBackend.java
@@ -5,6 +5,8 @@ import org.shedlang.compiler.backends.llvm.ir.LlvmIrSerializer;
 import org.shedlang.compiler.backends.llvm.ir.ast.LlvmModule;
 import org.shedlang.compiler.config.ProjectConfig;
 import org.shedlang.compiler.filesystem.ShedCompilerFiles;
+import org.shedlang.compiler.patio.PatioCodeGen;
+import org.shedlang.compiler.patio.PatioCodeGenContext;
 import org.shedlang.compiler.stackir.StackIrNamespace;
 import org.shedlang.compiler.typechecker.TypeInfo;
 
@@ -20,6 +22,38 @@ import java.util.List;
 import static org.shedlang.compiler.backends.ProcessRunner.runInheritIo;
 
 public class LlvmBackend implements Backend {
+    public static final LlvmBackend DIRECT = new LlvmBackend(new CodeGen() {
+        @Override
+        public LlvmModule generateNamespace(StackIrNamespace stackIrNamespace, TypeInfo typeInfo) {
+            return LlvmCodeGen.generateNamespace(stackIrNamespace, typeInfo);
+        }
+    });
+
+    public static final LlvmBackend PATIO = new LlvmBackend(new CodeGen() {
+        @Override
+        public LlvmModule generateNamespace(StackIrNamespace stackIrNamespace, TypeInfo typeInfo) {
+            var patioCompilationUnit = PatioCodeGen.generateNamespace(
+                stackIrNamespace,
+                PatioCodeGenContext.forTypeInfo(typeInfo)
+            );
+
+            return LlvmPatioCodeGen.generateCompilationUnit(patioCompilationUnit);
+        }
+    });
+
+    interface CodeGen {
+        LlvmModule generateNamespace(
+            StackIrNamespace stackIrNamespace,
+            TypeInfo typeInfo
+        );
+    }
+
+    private final CodeGen codeGen;
+
+    private LlvmBackend(CodeGen codeGen) {
+        this.codeGen = codeGen;
+    }
+
     @Override
     public void compile(
         ProjectConfig config,
@@ -29,10 +63,7 @@ public class LlvmBackend implements Backend {
     ) throws IOException, InterruptedException {
         var objectFilePaths = new ArrayList<Path>();
         for (var namespace : namespaces) {
-            var llvmModule = LlvmCodeGen.generateNamespace(
-                namespace,
-                typeInfo
-            );
+            var llvmModule = this.codeGen.generateNamespace(namespace, typeInfo);
 
             var objectPath = compileLlvmModule(
                 llvmModule,
diff --git a/src/main/java/org/shedlang/compiler/backends/llvm/LlvmPatioCodeGen.java b/src/main/java/org/shedlang/compiler/backends/llvm/LlvmPatioCodeGen.java
new file mode 100644
index 00000000..76b6a1b9
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/backends/llvm/LlvmPatioCodeGen.java
@@ -0,0 +1,10 @@
+package org.shedlang.compiler.backends.llvm;
+
+import org.shedlang.compiler.backends.llvm.ir.ast.LlvmModule;
+import org.shedlang.compiler.patio.ast.PatioCompilationUnit;
+
+public class LlvmPatioCodeGen {
+    public static LlvmModule generateCompilationUnit(PatioCompilationUnit patioCompilationUnit) {
+        throw new UnsupportedOperationException();
+    }
+}
-- 
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