| commit | d74d2847573df690b6a91254688ef3fd974f83f7 | [log] [tgz] |
|---|---|---|
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | Wed May 23 22:37:27 2012 +0000 |
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | Wed May 23 22:37:27 2012 +0000 |
| tree | f793c5feb12ffc47c6b14a91936ff52d6d7b0630 | |
| parent | dbb4e57a3c7fb18d5ff2d9504c5cacb5df20fab4 [diff] |
Add a last resort tryInstructionSplit() to RAGreedy. Live ranges with a constrained register class may benefit from splitting around individual uses. It allows the remaining live range to use a larger register class where it may allocate. This is like spilling to a different register class. This is only attempted on constrained register classes. <rdar://problem/11438902> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157354 91177308-0d34-0410-b5e6-96231b3b80d8