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build: make empty runtime.init if no runtime needed

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This commit is contained in:
xushiwei
2024-05-01 17:44:12 +08:00
parent 6e4a44438b
commit 66337e0975
1 changed files with 22 additions and 8 deletions
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30
internal/build/build.go
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@@ -126,7 +126,7 @@ func Do(args []string, conf *Config) {
return rt[0].Types
})
buildAllPkgs(prog, initial, mode, verbose)
pkgs := buildAllPkgs(prog, initial, mode, verbose)
var runtimeFiles []string
if rt != nil {
@@ -136,7 +136,7 @@ func Do(args []string, conf *Config) {
nErr := 0
for _, pkg := range initial {
if pkg.Name == "main" {
nErr += linkMainPkg(pkg, runtimeFiles, conf, mode, verbose)
nErr += linkMainPkg(pkg, pkgs, runtimeFiles, conf, mode, verbose)
}
}
if nErr > 0 {
@@ -153,7 +153,7 @@ func isNeedRuntime(pkg *packages.Package) bool {
return pkg.ID == ""
}
func buildAllPkgs(prog llssa.Program, initial []*packages.Package, mode Mode, verbose bool) {
func buildAllPkgs(prog llssa.Program, initial []*packages.Package, mode Mode, verbose bool) (pkgs []*aPackage) {
// Create SSA-form program representation.
ssaProg, pkgs, errPkgs := allPkgs(initial, ssa.SanityCheckFunctions)
ssaProg.Build()
@@ -169,9 +169,10 @@ func buildAllPkgs(prog llssa.Program, initial []*packages.Package, mode Mode, ve
setNeedRuntime(pkg.Package)
}
}
return
}
func linkMainPkg(pkg *packages.Package, runtimeFiles []string, conf *Config, mode Mode, verbose bool) (nErr int) {
func linkMainPkg(pkg *packages.Package, pkgs []*aPackage, runtimeFiles []string, conf *Config, mode Mode, verbose bool) (nErr int) {
pkgPath := pkg.PkgPath
name := path.Base(pkgPath)
app := conf.OutFile
@@ -194,6 +195,17 @@ func linkMainPkg(pkg *packages.Package, runtimeFiles []string, conf *Config, mod
})
if needRuntime && runtimeFiles != nil {
args = append(args, runtimeFiles...)
} else {
for _, aPkg := range pkgs {
if aPkg.Package == pkg { // make empty runtime.init if no runtime needed
lpkg := aPkg.LPkg
lpkg.FuncOf(cl.RuntimeInit).MakeBody(1).Return()
if needLLFile(mode) {
file := pkg.ExportFile + ".ll"
os.WriteFile(file, []byte(lpkg.String()), 0644)
}
}
}
}
if verbose || mode != ModeRun {
@@ -222,7 +234,7 @@ func linkMainPkg(pkg *packages.Package, runtimeFiles []string, conf *Config, mod
return
}
func buildPkg(prog llssa.Program, aPkg aPackage, mode Mode, verbose bool) {
func buildPkg(prog llssa.Program, aPkg *aPackage, mode Mode, verbose bool) {
pkg := aPkg.Package
if cl.PkgKindOf(pkg.Types) == cl.PkgDeclOnly {
// skip packages that only contain declarations
@@ -243,14 +255,16 @@ func buildPkg(prog llssa.Program, aPkg aPackage, mode Mode, verbose bool) {
file := pkg.ExportFile + ".ll"
os.WriteFile(file, []byte(ret.String()), 0644)
}
aPkg.LPkg = ret
}
type aPackage struct {
*packages.Package
SSA *ssa.Package
SSA *ssa.Package
LPkg llssa.Package
}
func allPkgs(initial []*packages.Package, mode ssa.BuilderMode) (prog *ssa.Program, all []aPackage, errs []*packages.Package) {
func allPkgs(initial []*packages.Package, mode ssa.BuilderMode) (prog *ssa.Program, all []*aPackage, errs []*packages.Package) {
var fset *token.FileSet
if len(initial) > 0 {
fset = initial[0].Fset
@@ -260,7 +274,7 @@ func allPkgs(initial []*packages.Package, mode ssa.BuilderMode) (prog *ssa.Progr
packages.Visit(initial, nil, func(p *packages.Package) {
if p.Types != nil && !p.IllTyped {
ssaPkg := prog.CreatePackage(p.Types, p.Syntax, p.TypesInfo, true)
all = append(all, aPackage{p, ssaPkg})
all = append(all, &aPackage{p, ssaPkg, nil})
} else {
errs = append(errs, p)
}