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