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4 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen 0c807dfae2 Clear kill flags in removeCopyByCommutingDef(). 
We are extending live ranges, so kill flags are not accurate. They
aren't needed until they are recomputed after RA anyway.

<rdar://problem/11950722>

llvm-svn: 161023
 2012-07-31 02:47:24 +00:00
Jakob Stoklund Olesen 71d3b895ba Also add <imp-def> operands for defined and dead super-registers when rewriting. 
We cannot rely on the <imp-def> operands added by LiveIntervals in all cases as
demonstrated by the test case.

llvm-svn: 130313
 2011-04-27 17:42:31 +00:00
Benjamin Kramer ba446cc12a Make tests more useful. 
lit needs a linter ...

llvm-svn: 130126
 2011-04-25 10:12:01 +00:00
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