[PATCH] D49247: [NFC][X86][AArch64] Add tests for the 'check for [no] signed truncation' pattern

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri created this revision.
lebedev.ri added reviewers: spatel, craig.topper, RKSimon.
Herald added a reviewer: javed.absar.
Herald added a subscriber: kristof.beyls.

PR38149 <https://bugs.llvm.org/show_bug.cgi?id=38149>

As disscussed in https://reviews.llvm.org/D49179#1158957 and later,
the IR can be improved:
https://rise4fun.com/Alive/gBf

But as it looks from these tests,
i think we want to revert at least some cases in DAGCombine.


Repository:
  rL LLVM

https://reviews.llvm.org/D49247

Files:
  test/CodeGen/AArch64/lack-of-signed-truncation-check.ll
  test/CodeGen/AArch64/signed-truncation-check.ll
  test/CodeGen/X86/lack-of-signed-truncation-check.ll
  test/CodeGen/X86/signed-truncation-check.ll

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