From 20d101c8c90fab89c75de2a7a3953c554e6302ad Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sat, 29 Jul 2023 13:50:18 +0100
Subject: Extract LlvmCompiler

---
 .../compiler/backends/llvm/LlvmBackend.java        | 27 +-----------
 .../compiler/backends/llvm/LlvmCompiler.java       | 48 ++++++++++++++++++++++
 2 files changed, 49 insertions(+), 26 deletions(-)
 create mode 100644 src/main/java/org/shedlang/compiler/backends/llvm/LlvmCompiler.java

(limited to 'src/main/java')

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 44ff7b77..d0f23f57 100644
--- a/src/main/java/org/shedlang/compiler/backends/llvm/LlvmBackend.java
+++ b/src/main/java/org/shedlang/compiler/backends/llvm/LlvmBackend.java
@@ -1,7 +1,6 @@
 package org.shedlang.compiler.backends.llvm;
 
 import org.shedlang.compiler.backends.Backend;
-import org.shedlang.compiler.backends.llvm.ir.LlvmIrSerializer;
 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.LlvmModule;
@@ -19,11 +18,7 @@ import org.shedlang.compiler.stackir.StackIrNamespace;
 import org.shedlang.compiler.typechecker.TypeInfo;
 import org.shedlang.compiler.types.NamespaceName;
 
-import java.io.BufferedWriter;
-import java.io.FileWriter;
 import java.io.IOException;
-import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.List;
@@ -162,26 +157,6 @@ public class LlvmBackend implements Backend {
         Path workingDirectory,
         String name
     ) throws IOException, InterruptedException {
-        var llvmModulePath = workingDirectory.resolve(name + ".ll");
-        Files.createDirectories(llvmModulePath.getParent());
-        var fileWriter = new FileWriter(llvmModulePath.toFile(), StandardCharsets.UTF_8);
-        try (var writer = new BufferedWriter(fileWriter)) {
-            LlvmIrSerializer.serializeModule(llvmModule, writer);
-        }
-
-        var objectPath = workingDirectory.resolve(name + ".o");
-        runLlvmCompiler(llvmModulePath, objectPath);
-
-        return objectPath;
+        return new LlvmCompiler(workingDirectory).compileLlvmModule(llvmModule, name);
     }
-
-    private static void runLlvmCompiler(Path llvmModulePath, Path objectPath) throws IOException, InterruptedException {
-        runInheritIo(List.of(
-            "llc-16", llvmModulePath.toString(),
-            "-filetype", "obj",
-            "-relocation-model", "pic",
-            "-o", objectPath.toString()
-        ));
-    }
-
 }
diff --git a/src/main/java/org/shedlang/compiler/backends/llvm/LlvmCompiler.java b/src/main/java/org/shedlang/compiler/backends/llvm/LlvmCompiler.java
new file mode 100644
index 00000000..04e13b39
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/backends/llvm/LlvmCompiler.java
@@ -0,0 +1,48 @@
+package org.shedlang.compiler.backends.llvm;
+
+import org.shedlang.compiler.backends.llvm.ir.LlvmIrSerializer;
+import org.shedlang.compiler.backends.llvm.ir.ast.LlvmModule;
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.List;
+
+import static org.shedlang.compiler.backends.ProcessRunner.runInheritIo;
+
+public class LlvmCompiler {
+    private final Path workingDirectory;
+
+    public LlvmCompiler(Path workingDirectory) {
+        this.workingDirectory = workingDirectory;
+    }
+
+    public Path compileLlvmModule(
+        LlvmModule llvmModule,
+        String name
+    ) throws IOException, InterruptedException {
+        var llvmModulePath = workingDirectory.resolve(name + ".ll");
+        Files.createDirectories(llvmModulePath.getParent());
+        var fileWriter = new FileWriter(llvmModulePath.toFile(), StandardCharsets.UTF_8);
+        try (var writer = new BufferedWriter(fileWriter)) {
+            LlvmIrSerializer.serializeModule(llvmModule, writer);
+        }
+
+        var objectPath = workingDirectory.resolve(name + ".o");
+        runLlvmCompiler(llvmModulePath, objectPath);
+
+        return objectPath;
+    }
+
+    private static void runLlvmCompiler(Path llvmModulePath, Path objectPath) throws IOException, InterruptedException {
+        runInheritIo(List.of(
+            "llc-16", llvmModulePath.toString(),
+            "-filetype", "obj",
+            "-relocation-model", "pic",
+            "-o", objectPath.toString()
+        ));
+    }
+}
-- 
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