cl: _testdata/printf

cl/_testdata/printf/out.ll

@@ -28,5 +28,6 @@ declare void @printf(ptr, ...)
 
 define void @main() {
 _llgo_0:
+  call void (ptr, ...) @printf(ptr @hello)
   ret void
 }

cl/compile.go

@@ -19,6 +19,7 @@ package cl
 import (
 	"fmt"
 	"log"
+	"os"
 	"sort"
 
 	llssa "github.com/goplus/llgo/ssa"
@@ -31,17 +32,45 @@ type dbgFlags = int
 
 const (
 	DbgFlagInstruction dbgFlags = 1 << iota
+	DbgFlagGoSSA
 
-	DbgFlagAll = DbgFlagInstruction
+	DbgFlagAll = DbgFlagInstruction | DbgFlagGoSSA
 )
 
 var (
 	debugInstr bool
+	debugGoSSA bool
 )
 
 // SetDebug sets debug flags.
 func SetDebug(dbgFlags dbgFlags) {
 	debugInstr = (dbgFlags & DbgFlagInstruction) != 0
+	debugGoSSA = (dbgFlags & DbgFlagGoSSA) != 0
+}
+
+// -----------------------------------------------------------------------------
+
+const (
+	fnNormal = iota
+	fnHasVArg
+	fnUnsafeInit
+)
+
+func funcKind(vfn ssa.Value) int {
+	if fn, ok := vfn.(*ssa.Function); ok {
+		n := len(fn.Params)
+		if n == 0 {
+			if fn.Name() == "init" && fn.Pkg.Pkg.Path() == "unsafe" {
+				return fnUnsafeInit
+			}
+		} else {
+			last := fn.Params[n-1]
+			if last.Name() == llssa.NameValist {
+				return fnHasVArg
+			}
+		}
+	}
+	return fnNormal
 }
 
 // -----------------------------------------------------------------------------
@@ -55,6 +84,7 @@ type context struct {
 	prog  llssa.Program
 	pkg   llssa.Package
 	fn    llssa.Function
+	goPkg *ssa.Package
 	bvals map[ssa.Value]llssa.Expr // block values
 	inits []func()
 }
@@ -88,6 +118,9 @@ func (p *context) compileFunc(pkg llssa.Package, f *ssa.Function) {
 		if nblk == 0 { // external function
 			return
 		}
+		if debugGoSSA {
+			f.WriteTo(os.Stderr)
+		}
 		if debugInstr {
 			log.Println("==> FuncBody", name)
 		}
@@ -116,8 +149,15 @@ func (p *context) compileInstrAndValue(b llssa.Builder, iv instrAndValue) (ret l
 	switch v := iv.(type) {
 	case *ssa.Call:
 		call := v.Call
+		kind := funcKind(call.Value)
+		if kind == fnUnsafeInit {
+			return
+		}
+		if debugGoSSA {
+			log.Println(">>> Call", call.Value, call.Args)
+		}
 		fn := p.compileValue(b, call.Value)
-		args := p.compileValues(b, call.Args)
+		args := p.compileValues(b, call.Args, kind)
 		ret = b.Call(fn, args...)
 	case *ssa.BinOp:
 		x := p.compileValue(b, v.X)
@@ -189,9 +229,15 @@ func (p *context) compileValue(b llssa.Builder, v ssa.Value) llssa.Expr {
 			}
 		}
 	case *ssa.Function:
+		if v.Pkg != p.goPkg {
+			panic("todo")
+		}
 		fn := p.pkg.FuncOf(v.Name())
 		return fn.Expr
 	case *ssa.Global:
+		if v.Pkg != p.goPkg {
+			panic("todo")
+		}
 		g := p.pkg.VarOf(v.Name())
 		return g.Expr
 	case *ssa.Const:
@@ -201,10 +247,25 @@ func (p *context) compileValue(b llssa.Builder, v ssa.Value) llssa.Expr {
 	panic(fmt.Sprintf("compileValue: unknown value - %T\n", v))
 }
 
-func (p *context) compileValues(b llssa.Builder, vals []ssa.Value) []llssa.Expr {
-	ret := make([]llssa.Expr, len(vals))
-	for i, v := range vals {
-		ret[i] = p.compileValue(b, v)
+func (p *context) compileVArg(ret []llssa.Expr, b llssa.Builder, v ssa.Value) []llssa.Expr {
+	_ = b
+	switch v := v.(type) {
+	case *ssa.Const:
+		if v.Value == nil {
+			return ret
+		}
+	}
+	panic("todo")
+}
+
+func (p *context) compileValues(b llssa.Builder, vals []ssa.Value, hasVArg int) []llssa.Expr {
+	n := len(vals) - hasVArg
+	ret := make([]llssa.Expr, n)
+	for i := 0; i < n; i++ {
+		ret[i] = p.compileValue(b, vals[i])
+	}
+	if hasVArg > 0 {
+		ret = p.compileVArg(ret, b, vals[n])
 	}
 	return ret
 }
@@ -240,6 +301,7 @@ func NewPackage(prog llssa.Program, pkg *ssa.Package, conf *Config) (ret llssa.P
 	ctx := &context{
 		prog:  prog,
 		pkg:   ret,
+		goPkg: pkg,
 	}
 	for _, m := range members {
 		member := m.val

cl/compile_test.go

@@ -34,7 +34,7 @@ import (
 )
 
 func TestFromTestdata(t *testing.T) {
-	testFromDir(t, "printf", "./_testdata")
+	testFromDir(t, "", "./_testdata")
 }
 
 func init() {
@@ -94,11 +94,6 @@ func testCompileEx(t *testing.T, src any, fname, expected string) {
 		t.Fatal("BuildPackage failed:", err)
 	}
 	foo.WriteTo(os.Stderr)
-	for _, m := range foo.Members {
-		if f, ok := m.(*ssa.Function); ok {
-			f.WriteTo(os.Stderr)
-		}
-	}
 	prog := llssa.NewProgram(nil)
 	ret, err := NewPackage(prog, foo, nil)
 	if err != nil {

ssa/expr.go

@@ -258,7 +258,7 @@ func (b Builder) UnOp(op token.Token, x Expr) Expr {
 // Load returns the value at the pointer ptr.
 func (b Builder) Load(ptr Expr) Expr {
 	if debugInstr {
-		log.Printf("Load @%v\n", ptr.impl.Name())
+		log.Printf("Load %v\n", ptr.impl.Name())
 	}
 	telem := b.prog.Elem(ptr.Type)
 	return Expr{llvm.CreateLoad(b.impl, telem.ll, ptr.impl), telem}
@@ -267,7 +267,7 @@ func (b Builder) Load(ptr Expr) Expr {
 // Store stores val at the pointer ptr.
 func (b Builder) Store(ptr, val Expr) Builder {
 	if debugInstr {
-		log.Printf("Store @%v, %v\n", ptr.impl.Name(), val.impl)
+		log.Printf("Store %v, %v\n", ptr.impl.Name(), val.impl)
 	}
 	b.impl.CreateStore(val.impl, ptr.impl)
 	return b

ssa/type.go

@@ -42,15 +42,15 @@ const (
 // -----------------------------------------------------------------------------
 
 const (
-	nameValist = "__llgo_va_list"
+	NameValist = "__llgo_va_list"
 )
 
 func VArg() *types.Var {
-	return types.NewParam(0, nil, nameValist, types.Typ[types.Invalid])
+	return types.NewParam(0, nil, NameValist, types.Typ[types.Invalid])
 }
 
 func IsVArg(arg *types.Var) bool {
-	return arg.Name() == nameValist
+	return arg.Name() == NameValist
 }
 
 func HasVArg(t *types.Tuple, n int) bool {