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4 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
ed1a4d695a 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
adb564f3cd 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
b2992c34b5 Make tests more useful. 
lit needs a linter ...

llvm-svn: 130126
 2011-04-25 10:12:01 +00:00
Jakob Stoklund Olesen
e72dfb1c45 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