llvm-project

Author	SHA1	Message	Date
Bill Wendling	f89986235d	Temporarily revert r90502. It was causing the llvm-gcc bootstrap on PPC to fail. llvm-svn: 90653	2009-12-05 07:30:23 +00:00
Jakob Stoklund Olesen	ca9cf65455	Also attempt trivial coalescing for live intervals that end in a copy. The coalescer is supposed to clean these up, but when setting up parameters for a function call, there may be copies to physregs. If the defining instruction has been LICM'ed far away, the coalescer won't touch it. The register allocation hint does not always work - when the register allocator is backtracking, it clears the hints. This patch takes care of a few more cases that r90163 missed. llvm-svn: 90502	2009-12-04 00:16:04 +00:00
Dan Gohman	40503396da	Eliminate more uses of llvm-as and llvm-dis. llvm-svn: 81290	2009-09-08 23:54:48 +00:00
Evan Cheng	f343168f1f	FIX llvm-gcc bootstrap on x86_64 linux. If a virtual register is copied to a physical register, it's not necessarily defined by a copy. We have to watch out it doesn't clobber any sub-register that might be live during its live interval. If the live interval crosses a basic block, then it's not safe to check with the less conservative check (by scanning uses and defs) because it's possible a sub-register might be live out of the block. llvm-svn: 62144	2009-01-13 03:57:45 +00:00