Hi! Seems I wrote a patch 7.5 years ago for and on the 3.4 branch (supposedly for a testcase that went latent on the trunk at that time, due to SSA merge?), and missed the fact that GET_RTX_CLASS changed on the trunk from characters to enum.
Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk? 2012-10-10 Jakub Jelinek <ja...@redhat.com> PR middle-end/54879 * combine.c (count_rtxs): Use RTX_BIN_ARITH resp. RTX_COMM_ARITH instead of '2' resp. 'c' for GET_RTX_CLASS comparisons. --- gcc/combine.c.jj 2012-09-27 12:45:55.000000000 +0200 +++ gcc/combine.c 2012-10-09 23:35:17.577659296 +0200 @@ -12015,8 +12015,8 @@ count_rtxs (rtx x) const char *fmt; int i, j, ret = 1; - if (GET_RTX_CLASS (code) == '2' - || GET_RTX_CLASS (code) == 'c') + if (GET_RTX_CLASS (code) == RTX_BIN_ARITH + || GET_RTX_CLASS (code) == RTX_COMM_ARITH) { rtx x0 = XEXP (x, 0); rtx x1 = XEXP (x, 1); @@ -12024,15 +12024,15 @@ count_rtxs (rtx x) if (x0 == x1) return 1 + 2 * count_rtxs (x0); - if ((GET_RTX_CLASS (GET_CODE (x1)) == '2' - || GET_RTX_CLASS (GET_CODE (x1)) == 'c') + if ((GET_RTX_CLASS (GET_CODE (x1)) == RTX_BIN_ARITH + || GET_RTX_CLASS (GET_CODE (x1)) == RTX_COMM_ARITH) && (x0 == XEXP (x1, 0) || x0 == XEXP (x1, 1))) return 2 + 2 * count_rtxs (x0) + count_rtxs (x == XEXP (x1, 0) ? XEXP (x1, 1) : XEXP (x1, 0)); - if ((GET_RTX_CLASS (GET_CODE (x0)) == '2' - || GET_RTX_CLASS (GET_CODE (x0)) == 'c') + if ((GET_RTX_CLASS (GET_CODE (x0)) == RTX_BIN_ARITH + || GET_RTX_CLASS (GET_CODE (x0)) == RTX_COMM_ARITH) && (x1 == XEXP (x0, 0) || x1 == XEXP (x0, 1))) return 2 + 2 * count_rtxs (x1) + count_rtxs (x == XEXP (x0, 0) Jakub