Method Invoke

core/codegen/builder.go:80–106

Invoke invokes the function f with the specified arguments. If an exception is thrown while calling f, then cleanup will be called before rethrowing the exception.

(f *Function, cleanup func(), args ...*Value)

// If an exception is thrown while calling f, then cleanup will be called before
// rethrowing the exception.
func (b *Builder) Invoke(f *Function, cleanup func(), args ...*Value) *Value {
	fn, sig, name := f.llvm, f.Type.Signature, f.Name

	l := b.callArgs(sig, name, args)

	then := b.m.ctx.AddBasicBlock(b.function.llvm, fmt.Sprintf("%v_nothrow", name))
	throw := b.m.ctx.AddBasicBlock(b.function.llvm, fmt.Sprintf("%v_catch", name))

	if sig.Result == b.m.Types.Void {
		name = ""
	}

	res := b.val(sig.Result, b.llvm.CreateInvoke(fn, l, then, throw, name))

	b.function.llvm.SetPersonality(b.m.exceptions.personalityFn.llvm)

	b.block(throw, llvm.BasicBlock{}, func() {
		lp := b.llvm.CreateLandingPad(b.m.exceptions.exceptionTy.llvmTy(), 0, "cleanup")
		lp.SetCleanup(true)
		cleanup()
		b.llvm.CreateResume(lp)
	})

	b.setInsertPointAtEnd(then)

	return res
}

// Throw throws an exception with the given value.
func (b *Builder) Throw(v *Value) {