Mircea Trofin a529d6ce7e [llvm][NFC] Inliner: simplify inlining decision logic
Summary:
shouldInline makes a decision based on the InlineCost of a call site, as
well as an evaluation on whether the site should be deferred. This means
it's possible for the decision to be not to inline, even for an
InlineCost that would otherwise allow it.

Both uses of shouldInline performed the exact same logic after calling
it. In addition, the decision on whether to inline or not was
communicated through two values of the Option<InlineCost> return value:
None, or an InlineCost evaluating to false.

Simplified by:
- encapsulating the decision in the return object. The bool it evaluates
to communicates unambiguously the decision. The InlineCost is also
available.
- encapsulated the common post-shouldInline code into shouldInline.

Reviewers: davidxl, echristo, eraman

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79215
2020-05-01 16:18:59 -07:00
2020-03-14 18:08:26 -07:00

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