diff options
Diffstat (limited to 'gcc/optabs.c')
| -rw-r--r-- | gcc/optabs.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/gcc/optabs.c b/gcc/optabs.c index 7448450d236..969d5cf5594 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -1,7 +1,7 @@ /* Expand the basic unary and binary arithmetic operations, for GNU compiler. Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 - Free Software Foundation, Inc. + 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, + 2011 Free Software Foundation, Inc. This file is part of GCC. @@ -2350,8 +2350,10 @@ widen_leading (enum machine_mode mode, rtx op0, rtx target, optab unoptab) if (target == 0) target = gen_reg_rtx (mode); - xop0 = widen_operand (op0, wider_mode, mode, true, false); - temp = expand_unop (wider_mode, unoptab, xop0, NULL_RTX, true); + xop0 = widen_operand (op0, wider_mode, mode, + unoptab != clrsb_optab, false); + temp = expand_unop (wider_mode, unoptab, xop0, NULL_RTX, + unoptab != clrsb_optab); if (temp != 0) temp = expand_binop (wider_mode, sub_optab, temp, GEN_INT (GET_MODE_BITSIZE (wider_mode) @@ -3075,8 +3077,9 @@ expand_unop (enum machine_mode mode, optab unoptab, rtx op0, rtx target, unsignedp); /* If we are generating clz using wider mode, adjust the - result. */ - if (unoptab == clz_optab && temp != 0) + result. Similarly for clrsb. */ + if ((unoptab == clz_optab || unoptab == clrsb_optab) + && temp != 0) temp = expand_binop (wider_mode, sub_optab, temp, GEN_INT (GET_MODE_BITSIZE (wider_mode) - GET_MODE_BITSIZE (mode)), |