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Author SHA1 Message Date
Chad Rosier e1a6a0e05c Add support for using anonymous bitfields (e.g., int : 0) to enforce alignment. 
This fixes cases where the anonymous bitfield is followed by a bitfield member.
E.g.,
struct t4
{
 char foo;
 long : 0;
 char bar : 1;
};

rdar://9859156

llvm-svn: 136991
 2011-08-05 22:38:04 +00:00
Chad Rosier 18903ee2d3 Add partial support for using anonymous bitfields (e.g., int : 0) to enforce 
alignment.  This fixes cases where the anonymous bitfield is followed by a 
non-bitfield member.  E.g.,

struct t4
{
  int foo : 1;
  long : 0;
  char bar;
};

Part of rdar://9859156

llvm-svn: 136858
 2011-08-04 01:21:14 +00:00
Chad Rosier 6088393248 For APCS the alignment of bitfield types is *not* respected when laying out 
structures.  Alignment can be enforced with the use of anonymous bitfields 
(e.g., int :0), but this is not currently supported.  Add this test case to 
document the current state, which will hopefully be fixed shortly. 

llvm-svn: 136848
 2011-08-04 00:19:13 +00:00