swift

c29cdd97 - LICM: add an optimization to move multiple loads and stores from/to the same memory location out of a loop.

LICM: add an optimization to move multiple loads and stores from/to the same memory location out of a loop. This is a combination of load hoisting and store sinking, e.g. preheader: br header_block header_block: %x = load %not_aliased_addr // use %x and define %y store %y to %not_aliased_addr ... exit_block: is transformed to: preheader: %x = load %not_aliased_addr br header_block header_block: // use %x and define %y ... exit_block: store %y to %not_aliased_addr