llgo/ssa/abi: PathOf fix - support trim PatchPathPrefix; typepatch fix: don't change patch pkg

cl/_testlibgo/errors/out.ll

@@ -0,0 +1,60 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
+%"github.com/goplus/llgo/internal/runtime.iface" = type { ptr, ptr }
+%"github.com/goplus/llgo/internal/runtime.eface" = type { ptr, ptr }
+
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
+@0 = private unnamed_addr constant [5 x i8] c"error", align 1
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"main.init$guard", align 1
+  call void @errors.init()
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define i32 @main(i32 %0, ptr %1) {
+_llgo_0:
+  store i32 %0, ptr @__llgo_argc, align 4
+  store ptr %1, ptr @__llgo_argv, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.init"()
+  call void @main.init()
+  %2 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %3 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %2, i32 0, i32 0
+  store ptr @0, ptr %3, align 8
+  %4 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %2, i32 0, i32 1
+  store i64 5, ptr %4, align 4
+  %5 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %2, align 8
+  %6 = call %"github.com/goplus/llgo/internal/runtime.iface" @errors.New(%"github.com/goplus/llgo/internal/runtime.String" %5)
+  %7 = call ptr @"github.com/goplus/llgo/internal/runtime.IfaceType"(%"github.com/goplus/llgo/internal/runtime.iface" %6)
+  %8 = extractvalue %"github.com/goplus/llgo/internal/runtime.iface" %6, 1
+  %9 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %10 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %9, i32 0, i32 0
+  store ptr %7, ptr %10, align 8
+  %11 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %9, i32 0, i32 1
+  store ptr %8, ptr %11, align 8
+  %12 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %9, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.Panic"(%"github.com/goplus/llgo/internal/runtime.eface" %12)
+  unreachable
+}
+
+declare void @errors.init()
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
+
+declare %"github.com/goplus/llgo/internal/runtime.iface" @errors.New(%"github.com/goplus/llgo/internal/runtime.String")
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.IfaceType"(%"github.com/goplus/llgo/internal/runtime.iface")
+
+declare void @"github.com/goplus/llgo/internal/runtime.Panic"(%"github.com/goplus/llgo/internal/runtime.eface")

internal/build/build.go

@@ -35,6 +35,7 @@ import (
 
 	"github.com/goplus/llgo/cl"
 	"github.com/goplus/llgo/internal/packages"
+	"github.com/goplus/llgo/ssa/abi"
 	"github.com/goplus/llgo/xtool/clang"
 	"github.com/goplus/llgo/xtool/env"
 
@@ -400,7 +401,7 @@ func buildPkg(ctx *context, aPkg *aPackage) {
 }
 
 const (
-	altPkgPathPrefix = "github.com/goplus/llgo/internal/lib/"
+	altPkgPathPrefix = abi.PatchPathPrefix
 )
 
 func altPkgs(initial []*packages.Package, alts ...string) []string {

internal/lib/errors/errors.go

@@ -15,3 +15,54 @@
  */
 
 package errors
+
+// llgo:skipall
+import (
+	_ "unsafe"
+)
+
+// Unwrap returns the result of calling the Unwrap method on err, if err's
+// type contains an Unwrap method returning error.
+// Otherwise, Unwrap returns nil.
+//
+// Unwrap only calls a method of the form "Unwrap() error".
+// In particular Unwrap does not unwrap errors returned by [Join].
+func Unwrap(err error) error {
+	u, ok := err.(interface {
+		Unwrap() error
+	})
+	if !ok {
+		return nil
+	}
+	return u.Unwrap()
+}
+
+// New returns an error that formats as the given text.
+// Each call to New returns a distinct error value even if the text is identical.
+func New(text string) error {
+	return &errorString{text}
+}
+
+// errorString is a trivial implementation of error.
+type errorString struct {
+	s string
+}
+
+func (e *errorString) Error() string {
+	return e.s
+}
+
+// ErrUnsupported indicates that a requested operation cannot be performed,
+// because it is unsupported. For example, a call to [os.Link] when using a
+// file system that does not support hard links.
+//
+// Functions and methods should not return this error but should instead
+// return an error including appropriate context that satisfies
+//
+//	errors.Is(err, errors.ErrUnsupported)
+//
+// either by directly wrapping ErrUnsupported or by implementing an Is method.
+//
+// Functions and methods should document the cases in which an error
+// wrapping this will be returned.
+var ErrUnsupported = New("unsupported operation")

internal/typepatch/patch.go

@@ -43,6 +43,7 @@ type typesScope struct {
 	isFunc   bool
 }
 
+/*
 type object struct {
 	parent *types.Scope
 	pos    token.Pos
@@ -54,6 +55,7 @@ type iface struct {
 	tab  unsafe.Pointer
 	data unsafe.Pointer
 }
+*/
 
 const (
 	tagPatched = 0x17
@@ -77,11 +79,24 @@ func setScope(pkg *types.Package, scope *types.Scope) {
 	p.scope = scope
 }
 
+/*
+func setPath(pkg *types.Package, path string) {
+	p := (*typesPackage)(unsafe.Pointer(pkg))
+	p.path = path
+}
+
+/*
+func setPkg(o types.Object, pkg *types.Package) {
+	data := (*iface)(unsafe.Pointer(&o)).data
+	(*object)(data).pkg = pkg
+}
+
 func setPkgAndParent(o types.Object, pkg *types.Package, parent *types.Scope) {
 	data := (*iface)(unsafe.Pointer(&o)).data
 	(*object)(data).pkg = pkg
 	(*object)(data).parent = parent
 }
+*/
 
 func getElems(scope *types.Scope) map[string]types.Object {
 	s := (*typesScope)(unsafe.Pointer(scope))
@@ -105,11 +120,23 @@ func Pkg(pkg, alt *types.Package) *types.Package {
 
 	altScope := alt.Scope()
 	for name, o := range getElems(altScope) {
-		setPkgAndParent(o, &ret, &scope)
+		/*
+			switch o := o.(type) {
+			case *types.TypeName:
+				if t, ok := o.Type().(*types.Named); ok {
+					for i, n := 0, t.NumMethods(); i < n; i++ {
+						m := t.Method(i)
+						setPkg(m, &ret)
+					}
+				}
+			}
+			setPkgAndParent(o, &ret, &scope)
+		*/
 		elems[name] = o
 	}
 	setElems(&scope, elems)
 	setScope(&ret, &scope)
 	setPatched(pkg)
+	// setPath(alt, ret.Path())
 	return &ret
 }

ssa/abi/abi.go

@@ -23,6 +23,7 @@ import (
 	"go/types"
 	"hash"
 	"log"
+	"strings"
 
 	"github.com/goplus/llgo/internal/abi"
 )
@@ -168,6 +169,10 @@ func (b *Builder) TypeName(t types.Type) (ret string, pub bool) {
 	return
 }
 
+const (
+	PatchPathPrefix = "github.com/goplus/llgo/internal/lib/"
+)
+
 // PathOf returns the package path of the specified package.
 func PathOf(pkg *types.Package) string {
 	if pkg == nil {
@@ -176,7 +181,7 @@ func PathOf(pkg *types.Package) string {
 	if pkg.Name() == "main" {
 		return "main"
 	}
-	return pkg.Path()
+	return strings.TrimPrefix(pkg.Path(), PatchPathPrefix)
 }
 
 // FullName returns the full name of a package member.