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| author | tromey <tromey@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-08-22 00:42:40 +0000 |
|---|---|---|
| committer | tromey <tromey@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-08-22 00:42:40 +0000 |
| commit | d50b22afcdae7245cbef3749e85f2cce581d47f4 (patch) | |
| tree | ab953fd73d6634557761e02e3e308f4b315d6dc6 /gcc/fold-const.c | |
| parent | 8531f242aa7ca71d1aa333f56c747f5b106781e1 (diff) | |
| download | gcc-d50b22afcdae7245cbef3749e85f2cce581d47f4.tar.gz | |
For PR java/6005 and PR java/7611:
* fold-const.c (fold_truthop): Use can_use_bit_fields_p.
(fold): Likewise.
* langhooks.c (lhd_can_use_bit_fields_p): New function.
* langhooks-def.h (lhd_can_use_bit_fields_p): Declare.
(LANG_HOOKS_CAN_USE_BIT_FIELDS_P): New define.
(LANG_HOOKS_INITIALIZER): Use it.
* langhooks.h (struct lang_hooks) [can_use_bit_fields_p]: New
field.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@56498 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 033dbfcfc62..b8da1a74b26 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -1,5 +1,5 @@ /* Fold a constant sub-tree into a single node for C-compiler - Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2002, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. This file is part of GCC. @@ -3711,6 +3711,11 @@ fold_truthop (code, truth_type, lhs, rhs) return 0; } + /* After this point all optimizations will generate bit-field + references, which we might not want. */ + if (! (*lang_hooks.can_use_bit_fields_p) ()) + return 0; + /* See if we can find a mode that contains both fields being compared on the left. If we can't, fail. Otherwise, update all constants and masks to be relative to a field of that size. */ @@ -6590,7 +6595,8 @@ fold (expr) } /* If this is a comparison of a field, we may be able to simplify it. */ - if ((TREE_CODE (arg0) == COMPONENT_REF + if (((TREE_CODE (arg0) == COMPONENT_REF + && (*lang_hooks.can_use_bit_fields_p) ()) || TREE_CODE (arg0) == BIT_FIELD_REF) && (code == EQ_EXPR || code == NE_EXPR) /* Handle the constant case even without -O |