Jakob Stoklund Olesen f4840c07f8 Fix emergency spilling in LiveIntervals::spillPhysRegAroundRegDefsUses. ...

Always spill the full representative register at any point where any subregister
is live.

This fixes PR8620 which caused the old logic to get confused and not spill
anything at all.

The fundamental problem here is that the coalescer is too aggressive about
physical register coalescing. It sometimes makes it impossible to allocate
registers without these emergency spills.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119375 91177308-0d34-0410-b5e6-96231b3b80d8

2010-11-16 19:55:14 +00:00

73 KiB

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