A method for aggregating a program loop in a Macroscalar architecture includes identifying one or more instructions of the program loop having a branch instruction that causes the program loop to branch dependent upon a predicate condition after a memory write operation. The method also includes modifying at least one of the one or more instructions to cause a processor executing the one or more instructions to branch after the memory write operation executed as a vector block for iterations prior to and including an iteration during which the predicate condition is satisfied.