[Bug target/66818] New: Wrong alignment value for attribute ((aligned)) with -miamcu

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66818

            Bug ID: 66818
           Summary: Wrong alignment value for attribute ((aligned)) with
                    -miamcu
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

attribute ((aligned)) should be 4 for -miamcu.  But we get

[hjl@gnu-6 gcc]$ cat /tmp/x.c
/* { dg-do compile { target ia32 } } */
/* { dg-options "-O2 -mno-sse -mno-mmx -miamcu" } */

struct dummy { int x __attribute__((aligned)); };
int array[__alignof__(struct dummy) == 4 ? 1 : -1];
[hjl@gnu-6 gcc]$ ./xgcc -B./ -S -m32 -miamcu /tmp/x.c   
/tmp/x.c:5:5: error: size of array ‘array’ is negative
 int array[__alignof__(struct dummy) == 4 ? 1 : -1];
     ^
[hjl@gnu-6 gcc]$