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  • Evan Cheng's avatar
    The check for coalescing a virtual register to a physical register, e.g. · 8c4df816
    Evan Cheng authored 
    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).

llvm-svn: 98251
    8c4df816