Aggregate pass execution time report by pass ID instead of pass instance.

This avoids unidentified duplicates in the pass execution time report
when a pass runs more than once in the pass manager pipeline.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169039 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed