[PATCH] D140369: [PowerPC] update PPCTTIImpl::supportsTailCallFor() check conditions

[Ting Wang via Phabricator via llvm-commits]

tingwang created this revision.
tingwang added reviewers: shchenz, nemanjai, PowerPC.
tingwang added a project: LLVM.
Herald added subscribers: kbarton, hiraditya.
Herald added a project: All.
tingwang requested review of this revision.
Herald added a subscriber: llvm-commits.

To address the reported issue https://github.com/llvm/llvm-project/issues/59315, this patch updates `PPCTTIImpl::supportsTailCallFor()` in following aspects:

(1) Add check logic for non-64BitELFABI sub-targets. This part of logic is missing from previous fix D131953 <https://reviews.llvm.org/D131953>, and caused the issue.
(2) Disable tailcall generation when longcall feature is turned on.
(3) Reuse `mayBeEmittedAsTailCall()` from TLI to check for 64BitELFABI sub-targets.
(4) Add asserts requirement for the test case.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D140369

Files:
  llvm/lib/Target/PowerPC/PPCISelLowering.h
  llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
  llvm/test/Transforms/Coroutines/coro-split-musttail-ppc64le.ll

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