| See http://gcc.gnu.org/PR15068 |
| |
| Fixes error |
| |
| ../sysdeps/generic/s_fmax.c: In function `__fmax': |
| ../sysdeps/generic/s_fmax.c:28: internal compiler error: in elim_reg_cond, at flow.c:3257 |
| Please submit a full bug report, |
| with preprocessed source if appropriate. |
| See <URL:http://gcc.gnu.org/bugs.html> for instructions. |
| 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 |
| 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' |
| make[1]: *** [math/others] Error 2 |
| make[1]: Leaving directory `/home/dank/wk/crosstool-0.28-rc35/build/arm-unknown-linux-gnu/gcc-3.4.1-glibc-20040822/glibc-20040822' |
| make: *** [all] Error 2 |
| |
| [ rediffed against gcc-3.4.1, with elbow grease, ending up with same thing as |
| 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 ] |
| |
| --- gcc-3.4.1/gcc/flow.c.old 2004-02-27 19:39:19.000000000 -0800 |
| +++ gcc-3.4.1/gcc/flow.c 2004-08-26 07:29:46.000000000 -0700 |
| @@ -1878,6 +1878,7 @@ |
| rtx set_src = SET_SRC (pc_set (BB_END (bb))); |
| rtx cond_true = XEXP (set_src, 0); |
| rtx reg = XEXP (cond_true, 0); |
| + enum rtx_code inv_cond; |
| |
| if (GET_CODE (reg) == SUBREG) |
| reg = SUBREG_REG (reg); |
| @@ -1886,11 +1887,13 @@ |
| in the form of a comparison of a register against zero. |
| If the condition is more complex than that, then it is safe |
| not to record any information. */ |
| - if (GET_CODE (reg) == REG |
| + inv_cond = reversed_comparison_code (cond_true, BB_END (bb)); |
| + if (inv_cond != UNKNOWN |
| + && GET_CODE (reg) == REG |
| && XEXP (cond_true, 1) == const0_rtx) |
| { |
| rtx cond_false |
| - = gen_rtx_fmt_ee (reverse_condition (GET_CODE (cond_true)), |
| + = gen_rtx_fmt_ee (inv_cond, |
| GET_MODE (cond_true), XEXP (cond_true, 0), |
| XEXP (cond_true, 1)); |
| if (GET_CODE (XEXP (set_src, 1)) == PC) |
