Taewook Oh 2da205d43e Reland "b19ec1eb3d0c [BPI] Improve unreachable/ColdCall heurstics to handle loops." ...

Summary: b19ec1eb3d has been reverted because of the test failures
with PowerPC targets. This patch addresses the issues from the previous
commit.

Test Plan: ninja check-all. Confirmed that CodeGen/PowerPC/pr36292.ll
and CodeGen/PowerPC/sms-cpy-1.ll pass

Subscribers: llvm-commits

2019-12-02 10:28:40 -08:00

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