Heat ¼ cup oil in a large skillet over medium heat. Add half of garlic and half of chiles and cook, stirring occasionally, until garlic is barely golden, about 1 minute. Season half of shrimp with salt and cook until just cooked through, about 1 minute per side; transfer shrimp and oil to a bowl. Repeat with remaining oil, garlic, chile, and shrimp. Return first batch of shrimp and oil to skillet. Season with salt and toss in parsley. Serve with bread.