[Bug middle-end/29253] expand_abs wrong default code for floating point

["bergner at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #8 from bergner at gcc dot gnu dot org  2008-02-04 17:04 -------
Ok, I bootstrapped with revision 132091.  The patched compiler ICE's on the
following test case:

typedef float TFtype __attribute__ ((mode (TF)));
TFtype
divtc3 (TFtype a, TFtype b)
{
  if (__builtin_fabsl (a) < __builtin_fabsl (b))
    {
      return a;
    }
  return b;
}

Here's a backtrace from the non debug build:

Program received signal SIGSEGV, Segmentation fault.
0x105475d4 in commutative_operand_precedence (op=0x0)
    at /home/bergner/gcc/PR29253/gcc-mainline-patched/gcc/rtlanal.c:2886
2886      enum rtx_code code = GET_CODE (op);
(gdb) bt
#0  0x105475d4 in commutative_operand_precedence (op=0x0)
    at /home/bergner/gcc/PR29253/gcc-mainline-patched/gcc/rtlanal.c:2886
#1  0x105478b8 in swap_commutative_operands_p (x=0x0, y=0x0)
    at /home/bergner/gcc/PR29253/gcc-mainline-patched/gcc/rtlanal.c:2951
#2  0x10212b1c in do_compare_rtx_and_jump (op0=0x0, op1=0x0, code=LT,
unsignedp=0, mode=TFmode, size=0x0, 
    if_false_label=0x0, if_true_label=0xf7f02b70)
    at /home/bergner/gcc/PR29253/gcc-mainline-patched/gcc/dojump.c:837
#3  0x10213edc in do_compare_and_jump (exp=0xf7f022a0, signed_code=LT,
unsigned_code=LTU, if_false_label=0x0, 
    if_true_label=0xf7f02b70) at
/home/bergner/gcc/PR29253/gcc-mainline-patched/gcc/dojump.c:1014
#4  0x1020f4cc in do_jump (exp=0xf7f022a0, if_false_label=0x0,
if_true_label=0xf7f02b70)
    at /home/bergner/gcc/PR29253/gcc-mainline-patched/gcc/dojump.c:396
#5  0x1020c138 in jumpif (exp=0xf7f022a0, label=0xf7f02b70)
    at /home/bergner/gcc/PR29253/gcc-mainline-patched/gcc/dojump.c:109
#6  0x10b42a44 in expand_gimple_cond_expr (bb=0xf7f0f6c0, stmt=0xf7f02300)
    at /home/bergner/gcc/PR29253/gcc-mainline-patched/gcc/cfgexpand.c:1315
#7  0x10b43c44 in expand_gimple_basic_block (bb=0xf7f0f6c0)
    at /home/bergner/gcc/PR29253/gcc-mainline-patched/gcc/cfgexpand.c:1578
#8  0x10b45dc0 in tree_expand_cfg () at
/home/bergner/gcc/PR29253/gcc-mainline-patched/gcc/cfgexpand.c:1921
[snip]


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29253