[Bug tree-optimization/60280] New: gcc.target/arm/ivopts.c and gcc.target/arm/ivopts-2.c failed caused by preserving loop structure.

[amker.cheng at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60280

            Bug ID: 60280
           Summary: gcc.target/arm/ivopts.c and gcc.target/arm/ivopts-2.c
                    failed caused by preserving loop structure.
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: amker.cheng at gmail dot com

gcc.target/arm/ivopts-2.c is like:

/* { dg-do assemble } */
/* { dg-options "-Os -fdump-tree-ivopts -save-temps" } */

extern void foo2 (short*);

void
tr4 (short array[], int n)
{
  int x;
  if (n > 0)
    for (x = 0; x < n; x++)
      foo2 (&array[x]);
}

/* { dg-final { scan-tree-dump-times "PHI <ivtmp" 1 "ivopts"} } */
/* { dg-final { scan-tree-dump-times "PHI <" 1 "ivopts"} } */
/* { dg-final { object-size text <= 26 { target arm_thumb2 } } } */
/* { dg-final { cleanup-tree-dump "ivopts" } } */
/* { dg-final { cleanup-saved-temps "ivopts" } } */

Build with options: -mthumb -mcpu=cortex-a15 -c
The size of text section is 28, causing regression.
Same story happens to ivopts.c