bright@Data-IO.COM (Walter Bright) (09/09/88)
In article <403@marob.MASA.COM> samperi@marob.masa.com (Dominick Samperi) writes: >Sorry for jumping into this discussion rather late, but could someone >please give a brief definition of "loop unrolling." It is the conversion of loops like: for (i = 0; i < 2; i++) foo(i); into: i = 0; foo(i); i = 1; foo(i); i = 2; Constant propagation and dead assignment elimination is then done in an attempt to reduce the above to: foo(0); foo(1); Note: my optimizer does not do loop unrolling. Loop unrolling is, however, common among Fortran optimizers.