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Hal Finkel
63496f66c5
Mark all PPC CR registers to be spilled as live-in and tag MFCR appropriately
Leaving MFCR has having unmodeled side effects is not enough to prevent unwanted instruction reordering post-RA. We could probably apply a stronger barrier attribute, but there is a better way: Add all (not just the first) CR to be spilled as live-in to the entry block, and add all CRs to the MFCR instruction as implicitly killed. Unfortunately, I don't have a small test case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179465 91177308-0d34-0410-b5e6-96231b3b80d8
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