Yevgeny Rouban e24a4fa7a0 Extend InvokeInst !prof branch_weights metadata to unwind branches ... Allow InvokeInst to have the second optional prof branch weight for its unwind branch. InvokeInst is a terminator with two successors. It might have its unwind branch taken many times. If so the BranchProbabilityInfo unwind branch heuristic can be inaccurate. This patch allows a higher accuracy calculated with both branch weights set. Changes: - A new section about InvokeInst is added to the BranchWeightMetadata page. It states the old information that missed in the doc and adds new about the second branch weight. - Verifier is changed to allow either 1 or 2 branch weights for InvokeInst. - A new test is written for BranchProbabilityInfo to demonstrate the main improvement of the simple fix in calcMetadataWeights(). - Several new testcases are created for Inliner. Those check that both weights are accounted for invoke instruction weight calculation. - PGOUseFunc::setBranchWeights() is fixed to be applicable to InvokeInst. Reviewers: davidxl, reames, xur, yamauchi Tags: #llvm Differential Revision: https://reviews.llvm.org/D80618		2020-06-04 15:37:15 +07:00
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basic.ll	Extend InvokeInst !prof branch_weights metadata to unwind branches	2020-06-04 15:37:15 +07:00
deopt-intrinsic.ll
fcmp.ll
libfunc_call.ll
loop.ll
noreturn.ll
pr18705.ll
pr22718.ll
switch.ll	[BPI] Incorrect probability reported in case of mulptiple edges.	2020-04-30 11:41:03 +07:00
zero_heuristics.ll