[all-commits] [llvm/llvm-project] 3c775d: [InlineCost] Reject a zero entry count

[kazutakahirata via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3c775d93a1dda3cec3bb6c7617c4b4ab770f4af0
      https://github.com/llvm/llvm-project/commit/3c775d93a1dda3cec3bb6c7617c4b4ab770f4af0
  Author: Kazu Hirata <kazu at google.com>
  Date:   2021-03-25 (Thu, 25 Mar 2021)

  Changed paths:
    M llvm/lib/Analysis/InlineCost.cpp

  Log Message:
  -----------
  [InlineCost] Reject a zero entry count

This patch teaches the cost-benefit-analysis-based inliner to reject a
zero entry count so that we don't trigger a divide-by-zero.


  Commit: 9d375a40c3df90dd48edc0e1b1115c702c55d716
      https://github.com/llvm/llvm-project/commit/9d375a40c3df90dd48edc0e1b1115c702c55d716
  Author: Kazu Hirata <kazu at google.com>
  Date:   2021-03-25 (Thu, 25 Mar 2021)

  Changed paths:
    M llvm/lib/Analysis/InlineCost.cpp

  Log Message:
  -----------
  Reapply [InlineCost] Enable the cost benefit analysis on FDO

This patch enables the cost-benefit-analysis-based inliner by default
if we have instrumentation profile.

- SPEC CPU 2017 shows a 0.4% improvement.

- An internal large benchmark shows a 0.9% reduction in the cycle
  count along with 14.6% reduction in the number of call instructions
  executed.

Differential Revision: https://reviews.llvm.org/D98213


Compare: https://github.com/llvm/llvm-project/compare/ec46e03daf54...9d375a40c3df