recover

cl/_testgo/defer3/in.go

@@ -20,4 +20,5 @@ func main() {
 		return
 	}
 	fail()
+	println("unreachable")
 }

cl/_testgo/defer4/in.go

@@ -0,0 +1,29 @@
+package main
+
+func f(s string) bool {
+	return len(s) > 2
+}
+
+func fail() {
+	defer println("bye")
+	defer func() {
+		if e := recover(); e != nil {
+			println("recover:", e.(string))
+		}
+	}()
+	panic("panic message")
+}
+
+func main() {
+	defer func() {
+		println("hi")
+	}()
+	if s := "hello"; f(s) {
+		defer println(s)
+	} else {
+		defer println("world")
+		return
+	}
+	fail()
+	println("reachable")
+}

cl/_testgo/defer4/out.ll

@@ -0,0 +1 @@
+;

cl/compile.go

@@ -555,7 +555,11 @@ func isPhi(i ssa.Instruction) bool {
 }
 
 func (p *context) compilePhis(b llssa.Builder, block *ssa.BasicBlock) int {
-	ret := p.fn.Block(block.Index)
+	fn := p.fn
+	ret := fn.Block(block.Index)
+	if block.Comment == "recover" { // set recover block
+		fn.SetRecover(ret)
+	}
 	b.SetBlockEx(ret, llssa.AtEnd, false)
 	if ninstr := len(block.Instrs); ninstr > 0 {
 		if isPhi(block.Instrs[0]) {