Jakob Stoklund Olesen ae044c06bf Pick a conservative register class when creating a small live range for remat. ...

The rematerialized instruction may require a more constrained register class
than the register being spilled. In the test case, the spilled register has been
inflated to the DPR register class, but we are rematerializing a load of the
ssub_0 sub-register which only exists for DPR_VFP2 registers.

The register class is reinflated after spilling, so the conservative choice is
only temporary.

llvm-svn: 128610

2011-03-31 03:54:44 +00:00

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