2 Commits

Author	SHA1	Message	Date
Manman Ren	86b1d868ba	[Stack Alignment] emit warning instead of a hard error ... Per discussion in rdar://13127907, we should emit a hard error only if people write code where the requested alignment is larger than achievable and assumes the low bits are zeros. A warning should be good enough when we are not sure if the source code assumes the low bits are zeros. rdar://13127907 llvm-svn: 174336	2013-02-04 23:45:08 +00:00
Manman Ren	207bcbacca	Stack Alignment: throw error if we can't satisfy the minimal alignment ... requirement when creating stack objects in MachineFrameInfo. Add CreateStackObjectWithMinAlign to throw error when the minimal alignment can't be achieved and to clamp the alignment when the preferred alignment can't be achieved. Same is true for CreateVariableSizedObject. Will not emit error in CreateSpillStackObject or CreateStackObject. As long as callers of CreateStackObject do not assume the object will be aligned at the requested alignment, we should not have miscompile since later optimizations which look at the object's alignment will have the correct information. rdar://12713765 llvm-svn: 172027	2013-01-10 01:10:10 +00:00