b65f6b0820
This allows rematerialization during register coalescing to handle
more cases involving operations like SUBREG_TO_REG which might need to
be rematerialized using sub-register indices.
For example, code like:
v1(GPR64):sub_32 = MOVZ something
v2(GPR64) = COPY v1(GPR64)
should be convertable to:
v2(GPR64):sub_32 = MOVZ something
but previously we just gave up in places like this
llvm-svn: 182872
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| .. | ||
| cfi-frame.ll | ||
| dwarfdump.ll | ||
| eh_frame.s | ||
| eh_frame_personality.ll | ||
| lit.local.cfg | ||
| variable-loc.ll | ||