[Bug target/23772] New: [3.3/3.4 regression] [arm] ICE in change_address_1, at emit-rtl.c:1886

[raj dot khem at gmail dot com]

There is an internal error in gcc when following code is compiled with -O2 -c
options.
=========================
typedef float floatvect2 __attribute__((mode(V2DF)));

typedef union
{
    floatvect2 vector;
    double f[2];
}resfloatvect2;

void tempf(double *x, double *y)
{
        floatvect2 temp={x[0],x[1]};
        floatvect2 temp1={y[0],y[1]};
        resfloatvect2 temp2;
        temp2.vector=temp+temp1;
        x[0]=temp2.f[0];
}

==================

test.c: In function `tempf':
test.c:16: internal compiler error: in change_address_1, at emit-rtl.c:1886
Please submit a full bug report,
with preprocessed source if appropriate.


I could reproduce this error on 3.3.1, 3.4.3, 3.4.4

It is working on gcc build from trunk.

Moreover if I compile the compiler with --with-fpu=vfp the testcase works for 
3.4.x

There has been a similar fix done in bug #11183.

-- 
           Summary: [3.3/3.4 regression] [arm] ICE in change_address_1, at
                    emit-rtl.c:1886
           Product: gcc
           Version: 3.4.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: raj dot khem at gmail dot com
                CC: gcc-bugs at gcc dot gnu dot org,rearnsha at gcc dot gnu
                    dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: arm-unknown-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23772