Craig Topper ab443175f0 [LoopIdiomRecognize] Add CTTZ support ...

Summary:
Existing LIR recognizes CTLZ where shifting input variable right until it is zero. (Shift-Until-Zero idiom)

This commit:
1. Augments Shift-Until-Zero idiom to recognize CTTZ where input variable is shifted left.
2. Prepare for BitScan idiom recognition.

Patch by Yuanfang Chen (tabloid.adroit)

Reviewers: craig.topper, evstupac

Reviewed By: craig.topper

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D55876

llvm-svn: 350074

2018-12-26 21:59:48 +00:00

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AMDGPU

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ARM

[ValueTracking] Match select abs pattern when there's an sext involved

2018-06-04 16:53:57 +00:00

X86

[LoopIdiomRecognize] Add CTTZ support

2018-12-26 21:59:48 +00:00

basic-address-space.ll

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

basic.ll

[LoopIdiom] Be more aggressive when setting alignment in memcpy

2018-02-08 17:33:08 +00:00

crash.ll

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ctpop-multiple-users-crash.ll

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debug-line.ll

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int_sideeffect.ll

Add an @llvm.sideeffect intrinsic

2017-11-08 21:59:51 +00:00

lir-heurs-multi-block-loop.ll

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

memset_noidiom.ll

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non-canonical-loop.ll

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non-integral-pointers.ll

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nontemporal_store.ll

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pr28196.ll

llvm: Add support for "-fno-delete-null-pointer-checks"

2018-07-09 22:27:23 +00:00

pr33114.ll

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scev-invalidation_topmostloop.ll

SCEV should forget all loops containing a deleted block.

2018-08-09 17:53:26 +00:00

scev-invalidation.ll

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struct_pattern.ll

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struct-custom-dl.ll

Adding a width of the GEP index to the Data Layout.

2018-02-14 06:58:08 +00:00

struct.ll

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unordered-atomic-memcpy-noarch.ll

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unroll-custom-dl.ll

Adding a width of the GEP index to the Data Layout.

2018-02-14 06:58:08 +00:00

unroll.ll

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unsafe.ll

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unwind.ll

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