2 Commits

Author	SHA1	Message	Date
Dan Gohman	df2896d609	Eliminate more uses of llvm-as and llvm-dis. ... llvm-svn: 81290	2009-09-08 23:54:48 +00:00
Dan Gohman	b9c32f1aca	Arithmetic instructions don't set EFLAGS bits OF and CF bits ... the same say the "test" instruction does in overflow cases, so eliminating the test is only safe when those bits aren't needed, as is the case for COND_E and COND_NE, or if it can be proven that no overflow will occur. For now, just restrict the optimization to COND_E and COND_NE and don't do any overflow analysis. llvm-svn: 66318	2009-03-07 01:58:32 +00:00