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| author | Geoffrey Keating <geoffk@redhat.com> | 2001-07-19 19:43:44 +0000 |
|---|---|---|
| committer | Geoffrey Keating <geoffk@gcc.gnu.org> | 2001-07-19 19:43:44 +0000 |
| commit | d54ef62c4726edbe17d327535db1fd679f014200 (patch) | |
| tree | d1511976936dbd59d6ae7eb5b9c8c917fa8c8935 | |
| parent | 7d46d516525c2a1977766d88306e85493b841add (diff) | |
| download | gcc-d54ef62c4726edbe17d327535db1fd679f014200.zip gcc-d54ef62c4726edbe17d327535db1fd679f014200.tar.gz gcc-d54ef62c4726edbe17d327535db1fd679f014200.tar.bz2 | |
ifcvt.c (noce_try_store_flag_constants): Use trunc_int_for_mode when negating constants.
* ifcvt.c (noce_try_store_flag_constants): Use trunc_int_for_mode
when negating constants.
From-SVN: r44158
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/ifcvt.c | 16 |
2 files changed, 14 insertions, 7 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 76125c6..e643a76 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2001-07-19 Geoffrey Keating <geoffk@redhat.com> + + * ifcvt.c (noce_try_store_flag_constants): Use trunc_int_for_mode + when negating constants. + 2001-07-19 Toon Moene <toon@moene.indiv.nluug.nl> * tree.def: Document restriction on {L|R}SHIFT_EXPR's second argument. diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c index d23fd3a..92bb6b5 100644 --- a/gcc/ifcvt.c +++ b/gcc/ifcvt.c @@ -642,14 +642,16 @@ noce_try_store_flag_constants (if_info) int reversep; HOST_WIDE_INT itrue, ifalse, diff, tmp; int normalize, can_reverse; + enum machine_mode mode; if (! no_new_pseudos && GET_CODE (if_info->a) == CONST_INT && GET_CODE (if_info->b) == CONST_INT) { + mode = GET_MODE (if_info->x); ifalse = INTVAL (if_info->a); itrue = INTVAL (if_info->b); - diff = itrue - ifalse; + diff = trunc_int_for_mode (mode, itrue - ifalse); can_reverse = (reversed_comparison_code (if_info->cond, if_info->jump) != UNKNOWN); @@ -680,7 +682,7 @@ noce_try_store_flag_constants (if_info) if (reversep) { tmp = itrue; itrue = ifalse; ifalse = tmp; - diff = -diff; + diff = trunc_int_for_mode (mode, -diff); } start_sequence (); @@ -695,7 +697,7 @@ noce_try_store_flag_constants (if_info) => x = 3 + (test == 0); */ if (diff == STORE_FLAG_VALUE || diff == -STORE_FLAG_VALUE) { - target = expand_binop (GET_MODE (if_info->x), + target = expand_binop (mode, (diff == STORE_FLAG_VALUE ? add_optab : sub_optab), GEN_INT (ifalse), target, if_info->x, 0, @@ -706,7 +708,7 @@ noce_try_store_flag_constants (if_info) => x = (test != 0) << 3; */ else if (ifalse == 0 && (tmp = exact_log2 (itrue)) >= 0) { - target = expand_binop (GET_MODE (if_info->x), ashl_optab, + target = expand_binop (mode, ashl_optab, target, GEN_INT (tmp), if_info->x, 0, OPTAB_WIDEN); } @@ -715,7 +717,7 @@ noce_try_store_flag_constants (if_info) => x = -(test != 0) | b; */ else if (itrue == -1) { - target = expand_binop (GET_MODE (if_info->x), ior_optab, + target = expand_binop (mode, ior_optab, target, GEN_INT (ifalse), if_info->x, 0, OPTAB_WIDEN); } @@ -724,11 +726,11 @@ noce_try_store_flag_constants (if_info) => x = (-(test != 0) & (b - a)) + a; */ else { - target = expand_binop (GET_MODE (if_info->x), and_optab, + target = expand_binop (mode, and_optab, target, GEN_INT (diff), if_info->x, 0, OPTAB_WIDEN); if (target) - target = expand_binop (GET_MODE (if_info->x), add_optab, + target = expand_binop (mode, add_optab, target, GEN_INT (ifalse), if_info->x, 0, OPTAB_WIDEN); } |