Dean Michael Berris 365612c08f [XRay][tools] Remove some assertions in llvm-xray graph
Summary:
Assertions assuming that function calls may not have zero durations do
not seem to hold in the wild. There are valid cases where the conversion
of the tsc counters end up becoming zero-length durations. These
assertions don't really hold and the algorithms don't need those to be
true for them to work.

Reviewers: dblaikie, echristo

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D31519

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299150 91177308-0d34-0410-b5e6-96231b3b80d8
2017-03-31 01:56:45 +00:00
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