Hal Finkel e4edd6cd8e [PowerPC] Extend physical register live range in PPCVSXFMAMutate ...

If the source of the copy that defines the addend is a physical register, then
its existing live range may not extend to the FMA being mutated. Make sure we
extend the live range of the register to meet the FMA because it will become
its operand in this case.

I don't have an independent test case, but it will be exposed by change to be
committed shortly enabling the use of the machine combiner to do fadd/fmul
reassociation, and will be covered by one of the associated regression tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242278 91177308-0d34-0410-b5e6-96231b3b80d8

2015-07-15 08:23:03 +00:00

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