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? -Pat 2016-09-20 Pat Haugen <pthau...@us.ibm.com> PR rtl-optimization/68212 * 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. Jeff
