5 Commits

Author	SHA1	Message	Date
Jakob Stoklund Olesen	ec2e964fd6	Remove the local register allocator. ... Please use the fast allocator instead. llvm-svn: 106051	2010-06-15 21:58:33 +00:00
Dale Johannesen	a466692552	Reapply 95050 with a tweak to check the register class. ... llvm-svn: 95183	2010-02-03 01:40:33 +00:00
Dale Johannesen	da431c76fb	Test revert 95050; there's a good chance it's causing ... buildbot failure. llvm-svn: 95103	2010-02-02 18:52:56 +00:00
Dale Johannesen	c84816a62e	Make local RA smarter about reusing input register of a copy ... as output. Needed for (functional) correctness in inline asm, and should be generally beneficial. 7361612. llvm-svn: 95050	2010-02-02 02:08:02 +00:00
Dale Johannesen	56f041406d	Do better with physical reg operands (typically, from inline asm) ... in local register allocator. If a reg-reg copy has a phys reg input and a virt reg output, and this is the last use of the phys reg, assign the phys reg to the virt reg. If a reg-reg copy has a phys reg output and we need to reload its spilled input, reload it directly into the phys reg than passing it through another reg. Following 76208, there is sometimes no dependency between the def of a phys reg and its use; this creates a window where that phys reg can be used for spilling (this is true in linear scan also). This is bad and needs to be fixed a better way, although 76208 works too well in practice to be reverted. However, there should normally be no spilling within inline asm blocks. The patch here goes a long way towards making this actually be true. llvm-svn: 91485	2009-12-16 00:29:41 +00:00