Commit Graph

5 Commits

Author SHA1 Message Date
Daniel Sanders b276a9a51e [globalisel] Support trivial COPY in GISelKnownBits
Summary: Allow GISelKnownBits to look through the trivial case of TargetOpcode::COPY

Reviewers: aditya_nandakumar

Subscribers: rovka, hiraditya, volkan, Petar.Avramovic, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67131

llvm-svn: 370955
2019-09-04 18:59:43 +00:00
Matt Arsenault b2b9a23758 GlobalISel: Add maskedValueIsZero and signBitIsZero to known bits
I dropped the DemandedElts since it seems to be missing from some of
the new interfaces, but not others.

llvm-svn: 370389
2019-08-29 17:24:36 +00:00
Aditya Nandakumar 70fdfed45f [GlobalISel]: Add KnownBits for G_XOR
https://reviews.llvm.org/D66119

llvm-svn: 368648
2019-08-13 04:32:33 +00:00
Aditya Nandakumar 55371e697c [GISel]: Fix a bug in KnownBits where we should have been using SizeInBits
https://reviews.llvm.org/D66039

We were using getIndexSize instead of getIndexSizeInBits().
Added test case for G_PTRTOINT and G_INTTOPTR.

llvm-svn: 368618
2019-08-12 21:28:12 +00:00
Aditya Nandakumar c8ac029d0a [GISel]: Add GISelKnownBits analysis
https://reviews.llvm.org/D65698

This adds a KnownBits analysis pass for GISel. This was done as a
pass (compared to static functions) so that we can add other features
such as caching queries(within a pass and across passes) in the future.
This patch only adds the basic pass boiler plate, and implements a lazy
non caching knownbits implementation (ported from SelectionDAG). I've
also hooked up the AArch64PreLegalizerCombiner pass to use this - there
should be no compile time regression as the analysis is lazy.

llvm-svn: 368065
2019-08-06 17:18:29 +00:00