59 Commits

Author	SHA1	Message	Date
Dan Gohman	bf293c48db	Fix a subtle bug in DeadMachineInstructionElim's liveness ... computation. A def of a register doesn't necessarily kill live super-registers. llvm-svn: 57614	2008-10-16 00:11:23 +00:00
Dan Gohman	0d1e9a8e04	Switch the MachineOperand accessors back to the short names like ... isReg, etc., from isRegister, etc. llvm-svn: 57006	2008-10-03 15:45:36 +00:00
Dan Gohman	b873aa632c	Add debug output to this pass. ... llvm-svn: 56602	2008-09-25 01:06:50 +00:00
Dan Gohman	6b33aa4d96	Refactor the logic for testing if an instruction is dead into a ... separate method. llvm-svn: 56531	2008-09-24 00:27:38 +00:00
Dan Gohman	1e2b282be3	Set SetStore to false, to allow this pass to delete ... dead loads. llvm-svn: 56529	2008-09-24 00:07:08 +00:00
Dan Gohman	676145f02d	Now that DeadMachineInstructionElim is basically working ... correctly, it's not necessary to explicitly remove registers from their use-def lists. llvm-svn: 56509	2008-09-23 22:04:18 +00:00
Dan Gohman	269999cb03	Track local physical register liveness. This is not the most ... efficient implementation possible, but it's pretty simple and good enough for the time being. llvm-svn: 56504	2008-09-23 21:40:44 +00:00
Dan Gohman	f3d647e00b	Don't consider instructions with implicit physical register ... defs to be necessarily live. llvm-svn: 56310	2008-09-18 18:22:32 +00:00
Dan Gohman	c24cd015a7	Add a new MachineInstr-level DCE pass. It is very simple, and is intended to ... be used with fast-isel. llvm-svn: 56268	2008-09-17 00:43:24 +00:00