Philip Reames c9d22d057f [CVP] Remove a masking operation if range information implies it's a noop ...

This is really a known bits style transformation, but known bits isn't context sensitive. The particular case which comes up happens to involve a range which allows range based reasoning to eliminate the mask pattern, so handle that case specifically in CVP.

InstCombine likes to generate the mask-by-low-bits pattern when widening an arithmetic expression which includes a zext in the middle.

Differential Revision: https://reviews.llvm.org/D68811



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@374506 91177308-0d34-0410-b5e6-96231b3b80d8

2019-10-11 03:48:56 +00:00

..

AggressiveInstCombine

[PatternMatch] Make m_Br more flexible, add matchers for BB values.

2019-09-25 15:05:08 +00:00

Coroutines

[Alignment][NFC] Remove AllocaInst::setAlignment(unsigned)

2019-09-30 13:34:44 +00:00

Hello

Update the file headers across all of the LLVM projects in the monorepo

2019-01-19 08:50:56 +00:00

InstCombine

[InstCombine] Fold conditional sign-extend of high-bit-extract into high-bit-extract-with-signext (PR42389)

2019-10-07 20:53:27 +00:00

Instrumentation

Revert 374481 "[tsan,msan] Insert module constructors in a module pass"

2019-10-11 02:44:20 +00:00

IPO

[Attributor][FIX] Do not replace musstail calls with constant

2019-10-11 01:45:32 +00:00

ObjCARC

[ObjC][ARC] Skip debug instructions when computing the insert point of

2019-09-19 20:58:51 +00:00

Scalar

[CVP] Remove a masking operation if range information implies it's a noop

2019-10-11 03:48:56 +00:00

Utils

[InstCombine] Add test case for PR43617 (NFC)

2019-10-10 21:29:10 +00:00

Vectorize

[LV][NFC] Factor out calculation of "best" estimated trip count.

2019-10-10 13:07:01 +00:00

CMakeLists.txt

Another try to commit 323321 (aggressive instruction combine).

2018-01-25 12:06:32 +00:00

LLVMBuild.txt

Update the file headers across all of the LLVM projects in the monorepo

2019-01-19 08:50:56 +00:00