The following patch fixes the performance regression in PR42108
by allowing PRE and LIM to see the division (to - from) / step
in translating do loops executed unconditionally. This makes
them not care for the fact that step might be zero and thus
the division might trap.
This makes the runtime
On Thu, Dec 11, 2014 at 11:05:13AM +0100, Richard Biener wrote:
The following patch fixes the performance regression in PR42108
by allowing PRE and LIM to see the division (to - from) / step
in translating do loops executed unconditionally. This makes
them not care for the fact that step
On Tue, 9 Dec 2014, Richard Biener wrote:
The following finally fixes PR42108 (well, hopefully...) by using
range-information on SSA names to allow the integer divisions introduced
by Fortran array lowering being hoisted out of loops, thus detecting
them as not trapping.
I chose to
The following finally fixes PR42108 (well, hopefully...) by using
range-information on SSA names to allow the integer divisions introduced
by Fortran array lowering being hoisted out of loops, thus detecting
them as not trapping.
I chose to enhance tree_single_nonzero_warnv_p for this and
