Manman Ren 69261a6442 Stack Alignment: when creating stack objects in MachineFrameInfo, make sure ... the alignment is clamped to TargetFrameLowering.getStackAlignment if the target does not support stack realignment or the option "realign-stack" is off. This will cause miscompile if the address is treated as aligned and add is replaced with or in DAGCombine. Added a bool StackRealignable to TargetFrameLowering to check whether stack realignment is implemented for the target. Also added a bool RealignOption to MachineFrameInfo to check whether the option "realign-stack" is on. rdar://12713765 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169197 91177308-0d34-0410-b5e6-96231b3b80d8		2012-12-04 00:52:33 +00:00
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llvm	Stack Alignment: when creating stack objects in MachineFrameInfo, make sure	2012-12-04 00:52:33 +00:00
llvm-c