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Author SHA1 Message Date
Roman Lebedev
42712698fd
Revert "[IR] IRBuilderBase::CreateAdd(): short-circuit x + 0 --> x" 
Clang OpenMP codegen tests are failing.

This reverts commit 288f1f8abe5835180a0021f142043ee261ab3846.
This reverts commit cb90e5356ac1594e95fed8e208d6e0e9b6a87db1.
 2021-10-27 22:21:37 +03:00
Roman Lebedev
cb90e5356a
[IR] IRBuilderBase::CreateAdd(): short-circuit x + 0 --> x 
There's precedent for that in `CreateOr()`/`CreateAnd()`.

The motivation here is to avoid bloating the run-time check's IR
in `SCEVExpander::generateOverflowCheck()`.

Refs. https://reviews.llvm.org/D109368#3089809
 2021-10-27 21:34:38 +03:00
David Green
1da0c47fa2 [LoopVectorizer] Don't create unused block masks for reductions. NFC 
This removes some unneeded block masks when we don't have any
reductions. It should not have any effect on codegen as the values
created are dead anyway.

Differential Revision: https://reviews.llvm.org/D81415
 2020-07-30 14:28:08 +01:00
Anh Tuyen Tran
e7c5412b37 [NFC][LV][TEST]: extend pr45679-fold-tail-by-masking.ll with -force-vector-width=1 -force-vector-interleave=4 
Summary:
Add -force-vector-width=1 -force-vector-interleave=4 to pr45679-fold-tail-by-masking.ll

Author: anhtuyen (Anh Tuyen Tran)

Reviewers: Ayal (Ayal Zaks)

Reviewed By: Ayal (Ayal Zaks)

Subscribers: rkruppe (Hanna Kruppe), llvm-commits, LLVM

Tag: LLVM

Differential Revision: https://reviews.llvm.org/D80446
 2020-06-09 18:30:56 +00:00
Anh Tuyen Tran
13bf6039c9 Title: [LV] Handle Fold-Tail of loops with vectorizarion factor equal to 1 
Summary:
When handling loops whose VF is 1, fold-tail vectorization sets the
backedge taken count of the original loop with a vector of a single
element. This causes type-mismatch during instruction generartion.

The purpose of this patch is toto address the case of VF==1.

Reviewer: Ayal (Ayal Zaks), bmahjour (Bardia Mahjour), fhahn (Florian Hahn), gilr (Gil Rapaport), rengolin (Renato Golin)

Reviewed By: Ayal (Ayal Zaks), bmahjour (Bardia Mahjour), fhahn (Florian Hahn)

Subscribers: Ayal (Ayal Zaks), rkruppe (Hanna Kruppe), bmahjour (Bardia Mahjour), rogfer01 (Roger Ferrer Ibanez), vkmr (Vineet Kumar), bollu (Siddharth Bhat), hiraditya (Aditya Kumar), llvm-commits (Mailing List llvm-commits)

Tag: LLVM

Differential Revision: https://reviews.llvm.org/D79976
 2020-05-22 13:30:56 +00:00