Craig Topper 05253fe705 [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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350074 91177308-0d34-0410-b5e6-96231b3b80d8

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

..

AMDGPU

AMDGPU: Other sizes of popcnt are fast

2016-05-18 16:10:19 +00:00

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

[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction

2015-02-27 19:29:02 +00:00

ctpop-multiple-users-crash.ll

Remove unnecessary lines from the test in r242068.

2015-07-13 21:50:35 +00:00

debug-line.ll

Remove the obsolete offset parameter from @llvm.dbg.value

2017-07-28 20:21:02 +00:00

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

[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction

2015-02-27 19:29:02 +00:00

non-canonical-loop.ll

[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction

2015-02-27 19:29:02 +00:00

non-integral-pointers.ll

[LIR] Obey non-integral pointer semantics

2017-04-24 20:12:10 +00:00

nontemporal_store.ll

[PM] Port LoopIdiomRecognize Pass to new PM

2016-07-12 18:45:51 +00:00

pr28196.ll

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

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

pr33114.ll

[LIR] Strengthen the check for recurrence variable in popcnt/CTLZ.

2017-05-23 22:32:56 +00:00

scev-invalidation_topmostloop.ll

SCEV should forget all loops containing a deleted block.

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

scev-invalidation.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

struct_pattern.ll

[LIR] Add support for structs and hand unrolled loops

2016-01-26 02:27:47 +00:00

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

[LIR] Add support for structs and hand unrolled loops

2016-01-26 02:27:47 +00:00

unordered-atomic-memcpy-noarch.ll

[Atomics] Rename and change prototype for atomic memcpy intrinsic

2017-06-16 14:43:59 +00:00

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

Fix some broken CHECK lines.

2017-01-22 20:28:56 +00:00

unsafe.ll

[LoopIdiom] check for safety while expanding

2017-05-05 14:49:45 +00:00

unwind.ll

[LIR] Fix mis-compilation with unwinding.

2016-07-06 21:05:40 +00:00