David Green cf1b18658c [InstCombine] Fold ~A - Min/Max(~A, O) -> Max/Min(A, ~O) - A ...

This is an attempt to get out of a local-minimum that instcombine currently
gets stuck in. We essentially combine two optimisations at once, ~a - ~b = b-a
and min(~a, ~b) = ~max(a, b), only doing the transform if the result is at
least neutral. This involves using IsFreeToInvert, which has been expanded a
little to include selects that can be easily inverted.

This is trying to fix PR35875, using the ideas from Sanjay. It is a large
improvement to one of our rgb to cmy kernels.

Differential Revision: https://reviews.llvm.org/D52177


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@343569 91177308-0d34-0410-b5e6-96231b3b80d8

2018-10-02 09:48:34 +00:00

..

AggressiveInstCombine

[Aggressive InstCombine] Move C bindings to their own header file.

2018-09-05 11:41:12 +00:00

Coroutines

llvm::sort(C.begin(), C.end(), ...) -> llvm::sort(C, ...)

2018-09-27 02:13:45 +00:00

Hello

Add auto-exporting of symbols from tools so that plugins work on Windows

2016-05-26 11:16:43 +00:00

InstCombine

[InstCombine] Fold ~A - Min/Max(~A, O) -> Max/Min(A, ~O) - A

2018-10-02 09:48:34 +00:00

Instrumentation

Use the container form llvm::sort(C, ...)

2018-09-30 22:31:29 +00:00

IPO

Temporarily revert "[GVNHoist] Re-enable GVNHoist by default"

2018-10-01 18:57:08 +00:00

ObjCARC

ProvenanceAnalysis: Store WeakTrackingVH instead of Value* in UnderlyingValue Cache.

2018-06-21 05:14:00 +00:00

Scalar

Recommit r343308: [LoopInterchange] Turn into a loop pass.

2018-10-01 09:59:48 +00:00

Utils

[SimplifyCFG] Use Value::hasNUses instead of 'getNumUses() =='. NFCI

2018-10-01 23:09:52 +00:00

Vectorize

[LV][LAA] Vectorize loop invariant values stored into loop invariant address

2018-09-25 20:57:20 +00:00

CMakeLists.txt

Another try to commit 323321 (aggressive instruction combine).

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

LLVMBuild.txt

Another try to commit 323321 (aggressive instruction combine).

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