On 09/20/2016 03:27 PM, Pat Haugen wrote:
The following patch corrects frequency/count values computed when generating
the switch blocks/peeled loop copies before the loop. The two main problem
areas were for the peeled copies duplicate_loop_to_header_edge was not using
the preheader frequency as part of the scale factor when peeling a copy of the
loop to the preheader edge, and the second was that the switch block generation
was just totally lacking code to compute correct freq/count values. Verified by
comparing freq/count values in the unroller dump before/after.
Bootstrap/regtest on powerpc64le with no new regressions. Ok for trunk?
2016-09-20 Pat Haugen <pthau...@us.ibm.com>
* cfgloopmanip.c (duplicate_loop_to_header_edge): Use preheader edge
frequency when computing scale factor for peeled copies.
* loop-unroll.c (unroll_loop_runtime_iterations): Fix freq/count
values for switch/peel blocks/edges.
OK. Thanks for your patience.