[r27360]

[r27359]

[r27356]

[r27352]

[r27350]

[r27348]

[r27347]

[r27346]

[r27333]

[r27332]

[r27330]

[r27328]

[r27325]

[r27324]

[r27323]

Loop inversion is more elegant and cleaned up now by using phases. Testsuite runs successfully with loop inversion.

[r27321]

[r27318]

[r27317]

[r27316]

[r27315]

[r27314]

now, a 0 means that a 0 is set for sure

[r27313]

[r27312]

[r27311]

invalidate phase info before starting the code selection; temporary disable freeing of old phases in dead code elimination to avoid problems

[r27309]

[r27308]

[r27307]

[r27306]

[r27305]

[r27304]

[r27303]

[r27302]

[r27301]

[r27300]

[r27297]

[r27295]

[r27293]

[r27291]

[r27290]

no need for obstack_printf from libc (we provide our own); no need to explicitely check for C89 function strerror

[r27289]