[Bug tree-optimization/48975] New: ICE in execute_cse_reciprocals() with -fno-tree-slp-vectorize

[arthur.j.odwyer at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48975

           Summary: ICE in execute_cse_reciprocals() with
                    -fno-tree-slp-vectorize
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: arthur.j.odw...@gmail.com


Created attachment 24232
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24232
Output of "ajo-gcc -w -O1 -finline-functions -ftree-vectorize -ffast-math
-fno-tree-slp-vectorize -c test1281247203.c"

This reproduces for me with svn revision 173589 (2011-05-09). It doesn't
reproduce with gcc 4.5.1. I'm on Ubuntu 10.10, x86-64.

cat >test1281247203.c <<EOF
static int ADD(int x) {
  return (x > 0) ? 0 : x+1;
}

void func_65(unsigned int x) {
    int l_376 = -1;
  lbl_469:
    while (x) {
      x = ADD(x);
    }
}
EOF
gcc -w -O1 -finline-functions -ftree-vectorize -ffast-math
-fno-tree-slp-vectorize -c test1281247203.c

test1281247203.c: In function ‘func_65’:
test1281247203.c:5:6: internal compiler error: in execute_cse_reciprocals, at
tree-ssa-math-opts.c:512


This test case is reduced from the output of Csmith 2.1.0 (git hash 541a6480,
https://github.com/csmith-project/csmith/), using the following command line:
csmith --no-paranoid --longlong --no-pointers --arrays --jumps --consts
--no-volatiles --no-checksum --no-divs --no-muls --no-bitfields
--no-packed-struct -s 1281247203