4 Commits

Author	SHA1	Message	Date
Rafael Espindola	464fe024c5	Use "weak alias" instead of "alias weak" ... Before this patch we had @a = weak global ... but @b = alias weak ... The patch changes aliases to look more like global variables. Looking at some really old code suggests that the reason was that the old bison based parser had a reduction for alias linkages and another one for global variable linkages. Putting the alias first avoided the reduce/reduce conflict. The days of the old .ll parser are long gone. The new one parses just "linkage" and a later check is responsible for deciding if a linkage is valid in a given context. llvm-svn: 214355	2014-07-30 22:51:54 +00:00
Rafael Espindola	4929301af4	Error if we see an alias to a declaration. ... In ELF and COFF an alias is just another offset in a section. There is no way to represent an alias to something in another file. In MachO, the spec has the N_INDR type which should allow for exactly that, but is not currently implemented. Given that it is specified but not implemented, we error in codegen to avoid miscompiling but don't reject aliases to declarations in the verifier to leave the option open of implementing it. In the past we have used alias to declarations as a way of implementing weakref, which is why it exists in some old tests which this patch updates. llvm-svn: 194705	2013-11-14 13:58:06 +00:00
Dan Gohman	c8054d90fb	Eliminate more uses of llvm-as and llvm-dis. ... llvm-svn: 81293	2009-09-09 00:09:15 +00:00
Chris Lattner	42e9ca42ce	LSR shouldn't ever try to hack on integer IV's larger than 64-bits. Right now ... it is not APInt clean, but even when it is it needs to be evaluated carefully to determine whether it is actually profitable. This fixes a crash on PR3806 llvm-svn: 67134	2009-03-17 23:58:30 +00:00