Evan Cheng 826cbac2a0 The check for coalescing a virtual register to a physical register, e.g. ...

cl = EXTRACT_SUBREG reg1024, 1, is overly conservative. It should check
for overlaps of vr's live interval with the super registers of the
physical register (ECX in this case) and let JoinIntervals() handle checking
the coalescing feasibility against the physical register (cl in this case).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98251 91177308-0d34-0410-b5e6-96231b3b80d8

2010-03-11 08:20:21 +00:00

18 KiB

Raw Blame History

View Raw