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re PR middle-end/39701 (Revision 145846 caused many test failures)

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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.

From-SVN: r145937
This commit is contained in:
H.J. Lu 2009-04-10 11:58:12 -07:00
parent 72b75d0333
commit 1ad2f450a0
4 changed files with 48 additions and 39 deletions
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82
gcc/ChangeLog
View File

@ -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/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.
* 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.
* 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>

2
gcc/common.opt
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@ -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=

2
gcc/doc/invoke.texi
View File

@ -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

1
gcc/opts.c
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@ -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;