compiler: refactor compiler into separate package

Makefile

@@ -54,7 +54,7 @@ clean:
 	@rm -rf build
 
 fmt:
-	@go fmt . ./ir ./src/examples/* ./src/machine ./src/runtime ./src/sync
+	@go fmt . ./compiler ./ir ./src/examples/* ./src/machine ./src/runtime ./src/sync
 
 gen-device: gen-device-nrf gen-device-avr
 

compiler/compiler.go

@@ -1,4 +1,4 @@
-package main
+package compiler
 
 import (
 	"errors"
@@ -139,6 +139,10 @@ func NewCompiler(pkgName, triple string, dumpSSA bool) (*Compiler, error) {
 	return c, nil
 }
 
+func (c *Compiler) Module() llvm.Module {
+	return c.mod
+}
+
 func (c *Compiler) Parse(mainPath string, buildTags []string) error {
 	tripleSplit := strings.Split(c.triple, "-")
 

compiler/sizes.go

@@ -1,4 +1,4 @@
-package main
+package compiler
 
 import (
 	"go/types"

compiler/util.go

@@ -1,4 +1,4 @@
-package main
+package compiler
 
 // This file contains functions that are also used by the runtime. These must be
 // kept in sync.

main.go

@@ -13,11 +13,12 @@ import (
 	"strings"
 
 	"github.com/aykevl/llvm/bindings/go/llvm"
+	"github.com/aykevl/tinygo/compiler"
 )
 
 // Helper function for Compiler object.
 func Compile(pkgName, outpath string, spec *TargetSpec, printIR, dumpSSA bool, printSizes string, action func(string) error) error {
-	c, err := NewCompiler(pkgName, spec.Triple, dumpSSA)
+	c, err := compiler.NewCompiler(pkgName, spec.Triple, dumpSSA)
 	if err != nil {
 		return err
 	}
@@ -187,7 +188,7 @@ func Flash(pkgName, target, port string, printIR, dumpSSA bool, printSizes strin
 
 // Run the specified package directly (using JIT or interpretation).
 func Run(pkgName string) error {
-	c, err := NewCompiler(pkgName, llvm.DefaultTargetTriple(), false)
+	c, err := compiler.NewCompiler(pkgName, llvm.DefaultTargetTriple(), false)
 	if err != nil {
 		return errors.New("compiler: " + err.Error())
 	}
@@ -200,7 +201,7 @@ func Run(pkgName string) error {
 	}
 	c.Optimize(1, 0, 0) // -O1, the fastest optimization level that doesn't crash
 
-	engine, err := llvm.NewExecutionEngine(c.mod)
+	engine, err := llvm.NewExecutionEngine(c.Module())
 	if err != nil {
 		return errors.New("interpreter setup: " + err.Error())
 	}