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3 Commits

Author SHA1 Message Date
Florian Hahn
e125885f36 [ValueLattice] Use union to shave off ptr size bytes from elements. 
By using a union for Constant* and ConstantRange we can shave off ptr
size bytes off lattice elements. On 64 bit systems, it brings down the
size to 40 bytes from 48 bytes.

Initialization of Range happens on-demand using placement new, if the
state changes to constantrange from non-constantrange. Similarly, the
Range object is destroyed if the state changes from constantrange to
non-constantrange.

Reviewers: reames, anna, davide

Reviewed By: reames, davide

Differential Revision: https://reviews.llvm.org/D41903

llvm-svn: 323049
 2018-01-20 19:52:16 +00:00
Florian Hahn
0dd4ced3cd [ValueLattice] Use getters instead of direct accesses (NFC). 
Reviewers: reames, davide, anna

Reviewed By: reames, davide

Differential Revision: https://reviews.llvm.org/D42270

llvm-svn: 322933
 2018-01-19 10:32:48 +00:00
Florian Hahn
a812673b8c [LVI] Move LVILatticeVal class to separate header file (NFC). 
Summary:
This allows sharing the lattice value code between LVI and SCCP (D36656). 

It also adds a `satisfiesPredicate` function, used by D36656.

Reviewers: davide, sanjoy, efriedma

Reviewed By: sanjoy

Subscribers: mgorny, llvm-commits

Differential Revision: https://reviews.llvm.org/D37591

llvm-svn: 314411
 2017-09-28 11:09:22 +00:00