[Bug target/66554] New: [4.9 Regression] ICE (in expand_fix, at optabs.c:5365) on aarch64-linux-gnu

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66554

            Bug ID: 66554
           Summary: [4.9 Regression] ICE (in expand_fix, at optabs.c:5365)
                    on aarch64-linux-gnu
           Product: gcc
           Version: 4.9.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org
  Target Milestone: ---

works with 4.7, didn't check 4.8, fails with 4.9, works with 5. -O2 works
around it.

$ cat source.ii
float *a;
unsigned b;
void fn1() {
  for (int c; c; ++c) {
    b = c;
    a[c] = b;
    a[c] = ({ short(a[c]) << 8; });
  }
}

$ g++-4.9 -c -O3 source.ii
source.ii: In function 'void fn1()':
source.ii:7:27: internal compiler error: in expand_fix, at optabs.c:5365
     a[c] = ({ short(a[c]) << 8; });
                           ^
Please submit a full bug report,
with preprocessed source if appropriate.