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Author SHA1 Message Date
Roman Lebedev 9c5a4a4527 [InstSimplify] simplifyUnsignedRangeCheck(): handle few tautological cases (PR43251) 
Summary:
This is split off from D67356, since these cases produce a constant,
no real need to keep them in instcombine.

Alive proofs:
https://rise4fun.com/Alive/u7Fk
https://rise4fun.com/Alive/4lV

https://bugs.llvm.org/show_bug.cgi?id=43251

Reviewers: spatel, nikic, xbolva00

Reviewed By: spatel

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67498

llvm-svn: 371921
 2019-09-14 13:47:27 +00:00
Roman Lebedev 4cb267f9f5 [NFC][InstSimplify] Add some more tests for D67498/D67502 
llvm-svn: 371877
 2019-09-13 17:58:24 +00:00
Roman Lebedev 80a8a85758 [InstCombine][InstSimplify] Move constant-folding tests in result-of-usub-is-non-zero-and-no-overflow.ll 
llvm-svn: 371737
 2019-09-12 14:12:31 +00:00