openwrt/toolchain/gcc/3.4.3/700-pr15068-fix.patch

   1 See http://gcc.gnu.org/PR15068
   2
   3 Fixes error
   4
   5 ../sysdeps/generic/s_fmax.c: In function `__fmax':
   6 ../sysdeps/generic/s_fmax.c:28: internal compiler error: in elim_reg_cond, at flow.c:3257
   7 Please submit a full bug report,
   8 with preprocessed source if appropriate.
   9 See <URL:http://gcc.gnu.org/bugs.html> for instructions.
  10 make[2]: *** [/home/dank/wk/crosstool-0.28-rc35/build/arm-unknown-linux-gnu/gcc-3.4.1-glibc-20040822/build-glibc/math/s_fmax.o] Error 1
  11 make[2]: Leaving directory `/home/dank/wk/crosstool-0.28-rc35/build/arm-unknown-linux-gnu/gcc-3.4.1-glibc-20040822/glibc-20040822/math'
  12 make[1]: *** [math/others] Error 2
  13 make[1]: Leaving directory `/home/dank/wk/crosstool-0.28-rc35/build/arm-unknown-linux-gnu/gcc-3.4.1-glibc-20040822/glibc-20040822'
  14 make: *** [all] Error 2
  15
  16 [ rediffed against gcc-3.4.1, with elbow grease, ending up with same thing as
  17 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/flow.c.diff?cvsroot=gcc&only_with_tag=csl-arm-branch&r1=1.563.4.2&r2=1.563.4.3 ]
  18
  19 --- gcc-3.4.1/gcc/flow.c.old    2004-02-27 19:39:19.000000000 -0800
  20 +++ gcc-3.4.1/gcc/flow.c        2004-08-26 07:29:46.000000000 -0700
  21 @@ -1878,6 +1878,7 @@
  22           rtx set_src = SET_SRC (pc_set (BB_END (bb)));
  23           rtx cond_true = XEXP (set_src, 0);
  24           rtx reg = XEXP (cond_true, 0);
  25 +         enum rtx_code inv_cond;
  26
  27           if (GET_CODE (reg) == SUBREG)
  28             reg = SUBREG_REG (reg);
  29 @@ -1886,11 +1887,13 @@
  30              in the form of a comparison of a register against zero.
  31              If the condition is more complex than that, then it is safe
  32              not to record any information.  */
  33 -         if (GET_CODE (reg) == REG
  34 +         inv_cond = reversed_comparison_code (cond_true, BB_END (bb));
  35 +         if (inv_cond != UNKNOWN
  36 +             && GET_CODE (reg) == REG
  37               && XEXP (cond_true, 1) == const0_rtx)
  38             {
  39               rtx cond_false
  40 -               = gen_rtx_fmt_ee (reverse_condition (GET_CODE (cond_true)),
  41 +               = gen_rtx_fmt_ee (inv_cond,
  42                                   GET_MODE (cond_true), XEXP (cond_true, 0),
  43                                   XEXP (cond_true, 1));
  44               if (GET_CODE (XEXP (set_src, 1)) == PC)