diff options
| -rw-r--r-- | gcc/ChangeLog | 86 | ||||
| -rw-r--r-- | gcc/common.opt | 2 | ||||
| -rw-r--r-- | gcc/doc/invoke.texi | 2 | ||||
| -rw-r--r-- | gcc/opts.c | 1 |
4 files changed, 50 insertions, 41 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9965730d134..c61b4cde606 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,13 @@ +2009-04-10 H.J. Lu <hongjiu.lu@intel.com> + + PR middle-end/39701 + * common.opt (-fdelete-null-pointer-checks): Initialize to 1. + + * opts.c (decode_options): Don't set flag_delete_null_pointer_checks + here. + + * doc/invoke.texi: Update -fdelete-null-pointer-checks. + 2009-04-10 Chao-ying Fu <fu@mips.com> * doc/tm.texi (Instruction Output): Document @@ -18,8 +28,8 @@ 2009-04-10 Paolo Bonzini <bonzini@gnu.org> PR middle-end/39701 - * fold-const.c (tree_single_nonzero_warnv_p): Pass non-static - variables as non-NULL even with -fdelete-null-pointer-checks. + * fold-const.c (tree_single_nonzero_warnv_p): Pass non-static + variables as non-NULL even with -fdelete-null-pointer-checks. 2009-04-10 H.J. Lu <hongjiu.lu@intel.com> @@ -54,8 +64,8 @@ * expmed.c (expand_divmod): Always use a comparison for a division by a large unsigned integer. - * fold-const.c (tree_single_nonzero_warnv_p): Always treat decls - for things others than variables or functions as nonzero. + * fold-const.c (tree_single_nonzero_warnv_p): Always treat decls + for things others than variables or functions as nonzero. 2009-04-09 Nick Clifton <nickc@redhat.com> @@ -396,40 +406,40 @@ 2009-04-09 Paolo Bonzini <bonzini@gnu.org> - * config/i386/i386.md (cmpcc): New. - * config/i386/sync.md (sync_compare_and_swap*): Set FLAGS_REG. - (sync_compare_and_swap_cc*): Delete. - - * config/s390/s390.c (s390_compare_emitted): Remove. - (s390_emit_compare): Handle MODE_CC s390_compare_op0 like - s390_compare_emitted used to be handled. Assert that modes match. - (s390_emit_compare_and_swap): Use s390_emit_compare, do not - refer to sync_compare_and_swap_ccsi. - * config/s390/s390.h (s390_compare_emitted): Remove. - * config/s390/s390.md (seq): Look for MODE_CC s390_compare_op0 - instead of s390_compare_emitted. - (stack_protect_test, sync_compare_and_swap_cc): Set s390_compare_op0 - instead of s390_compare_emitted. - * config/s390/s390.md (cmpcc): New. - (sync_compare_and_swapqi, sync_compare_and_swaphi): Clobber - CC_REGNUM, do not pretend it's set. - (sync_compare_and_swap_cc*): Delete. - * config/s390/predicates.md (cc_reg_operand): New. - - * expr.c (sync_compare_and_swap_cc): Delete. - * optabs.h (sync_compare_and_swap_cc): Delete. - * optabs.c (prepare_cmp_insn): Ignore which specific CCmode - is being used with can_compare_p. - (emit_cmp_and_jump_insn_1): Likewise when looking in the optab. - (find_cc_set): New. - (expand_bool_compare_and_swap): Do not use sync_compare_and_swap_cc, - look for a MODE_CC set instead. Use emit_store_flag. - (expand_compare_and_swap_loop): Likewise, with some additional - complication to avoid a force_reg when useless. Use - emit_cmp_and_jump_insns. - * genopinit.c (optabs): Delete sync_compare_and_swap_cc. - * doc/md.texi (sync_compare_and_swap_cc): Merge with - sync_compare_and_swap documentation. + * config/i386/i386.md (cmpcc): New. + * config/i386/sync.md (sync_compare_and_swap*): Set FLAGS_REG. + (sync_compare_and_swap_cc*): Delete. + + * config/s390/s390.c (s390_compare_emitted): Remove. + (s390_emit_compare): Handle MODE_CC s390_compare_op0 like + s390_compare_emitted used to be handled. Assert that modes match. + (s390_emit_compare_and_swap): Use s390_emit_compare, do not + refer to sync_compare_and_swap_ccsi. + * config/s390/s390.h (s390_compare_emitted): Remove. + * config/s390/s390.md (seq): Look for MODE_CC s390_compare_op0 + instead of s390_compare_emitted. + (stack_protect_test, sync_compare_and_swap_cc): Set s390_compare_op0 + instead of s390_compare_emitted. + * config/s390/s390.md (cmpcc): New. + (sync_compare_and_swapqi, sync_compare_and_swaphi): Clobber + CC_REGNUM, do not pretend it's set. + (sync_compare_and_swap_cc*): Delete. + * config/s390/predicates.md (cc_reg_operand): New. + + * expr.c (sync_compare_and_swap_cc): Delete. + * optabs.h (sync_compare_and_swap_cc): Delete. + * optabs.c (prepare_cmp_insn): Ignore which specific CCmode + is being used with can_compare_p. + (emit_cmp_and_jump_insn_1): Likewise when looking in the optab. + (find_cc_set): New. + (expand_bool_compare_and_swap): Do not use sync_compare_and_swap_cc, + look for a MODE_CC set instead. Use emit_store_flag. + (expand_compare_and_swap_loop): Likewise, with some additional + complication to avoid a force_reg when useless. Use + emit_cmp_and_jump_insns. + * genopinit.c (optabs): Delete sync_compare_and_swap_cc. + * doc/md.texi (sync_compare_and_swap_cc): Merge with + sync_compare_and_swap documentation. 2009-04-09 Jan Hubicka <jh@suse.cz> diff --git a/gcc/common.opt b/gcc/common.opt index 1cc0ac267a0..c15de5a4bce 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -436,7 +436,7 @@ Common Report Var(flag_delayed_branch) Optimization Attempt to fill delay slots of branch instructions fdelete-null-pointer-checks -Common Report Var(flag_delete_null_pointer_checks) Optimization +Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization Delete useless null pointer checks fdiagnostics-show-location= diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 29ccb2258cb..e87de62049a 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -5898,7 +5898,7 @@ safely dereference null pointers. Use @option{-fno-delete-null-pointer-checks} to disable this optimization for programs which depend on that behavior. -Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}. +Enabled by default. @item -fexpensive-optimizations @opindex fexpensive-optimizations diff --git a/gcc/opts.c b/gcc/opts.c index 2c7531e2dba..76f5d1ed913 100644 --- a/gcc/opts.c +++ b/gcc/opts.c @@ -894,7 +894,6 @@ decode_options (unsigned int argc, const char **argv) flag_regmove = opt2; flag_strict_aliasing = opt2; flag_strict_overflow = opt2; - flag_delete_null_pointer_checks = opt2; flag_reorder_blocks = opt2; flag_reorder_functions = opt2; flag_tree_vrp = opt2; |