diff options
| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-06-21 16:25:57 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-06-21 16:25:57 +0000 |
| commit | 6aaa1f9eb2f11b9afcc7c331b6b035013eca098a (patch) | |
| tree | 9c216d752e228b140bcd643fe2591b081c4af049 /gcc/optabs.c | |
| parent | d2d4033906e05c5153757c50b9b9d2537914598a (diff) | |
| download | gcc-6aaa1f9eb2f11b9afcc7c331b6b035013eca098a.tar.gz | |
PR middle-end/49489
* builtins.c (expand_builtin_unop): Call expand_unop with 0 as
unsignedp argument instead of 1 for clrsb_optab.
(fold_builtin_bitop): Fix masking for width > HOST_BITS_PER_WIDE_INT
and < 2 * HOST_BITS_PER_WIDE_INT. Optimize BUILT_IN_CLRSB*.
(fold_builtin_1): Call fold_builtin_binop for BUILT_IN_CLRSB*.
* optabs.c (widen_leading): Call widen_operand and expand_unop
with 0 as unsignedp argument instead of 1 for clrsb_optab.
(expand_unop): Subtract difference of mode sizes also for
clrsb_optab.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@175265 138bc75d-0d04-0410-961f-82ee72b054a4
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)), |