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[Bug target/38737] New: [4.4 Regression] __alignof__ (_Unwind_Exception) depends on -mavx

When -mavx was added BIGGEST_ALIGNMENT was changed to depend on it.  This
changes the behavior of __attribute__((aligned)), which is used to define
struct _Unwind_Exception, and which changes the ABI of anything that uses it.

           Summary: [4.4 Regression] __alignof__ (_Unwind_Exception) depends
                    on -mavx
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ABI
          Severity: critical
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: schwab at suse dot de
GCC target triplet: i?86-*-*
OtherBugsDependingO 38732


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