2 Commits

Author	SHA1	Message	Date
Evan Cheng	06b0d3879e	Enable loop bb placement optimization. ... llvm-svn: 71291	2009-05-08 23:35:49 +00:00
Evan Cheng	2a1d20b0fb	Optimize code placement in loop to eliminate unconditional branches or move unconditional branch to the outside of the loop. e.g. ... /// A: /// ... /// <fallthrough to B> /// /// B: --> loop header /// ... /// jcc <cond> C, [exit] /// /// C: /// ... /// jmp B /// /// ==> /// /// A: /// ... /// jmp B /// /// C: --> new loop header /// ... /// <fallthough to B> /// /// B: /// ... /// jcc <cond> C, [exit] llvm-svn: 71209	2009-05-08 06:34:09 +00:00