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| author | Uros Bizjak <uros@gcc.gnu.org> | 2008-11-17 12:19:06 +0100 |
|---|---|---|
| committer | Uros Bizjak <uros@gcc.gnu.org> | 2008-11-17 12:19:06 +0100 |
| commit | 23462d4d8fb5b5e40d6a62dd285301228f13a37b (patch) | |
| tree | ec588937bd71d8c137cd8e58e26176a069ebf17b /gcc/c.opt | |
| parent | 73ce7fcb8cdacf40e7342834e1af9d930e012e02 (diff) | |
| download | gcc-23462d4d8fb5b5e40d6a62dd285301228f13a37b.zip gcc-23462d4d8fb5b5e40d6a62dd285301228f13a37b.tar.gz gcc-23462d4d8fb5b5e40d6a62dd285301228f13a37b.tar.bz2 | |
re PR middle-end/37908 (atomic NAND op generate wrong code; __sync_nand_and_fetch, __sync_fetch_and_nand)
PR middle-end/37908
* optabs.c (expand_sync_operation): Properly handle NAND case
by calculating ~(t1 & val) instead of (~t1 & val).
* builtins.c (expand_builtin_sync_operation): Warn for changed
semantics in NAND builtins.
* c.opt (Wsync-nand): New warning option. Describe -Wsync-nand.
* doc/invoke.texi (Warning options): Add Wsync-nand.
* doc/extend.texi (Atomic Builtins) [__sync_fetch_and_nand]: Correct
__sync_fetch_and_nand builtin operation in the example. Add a note
about changed semantics in GCC 4.4.
[__sync_nand_and_fetch]: Correct __sync_nand_and_fetch builtin
operation in the example. Add a note about changed semantics in
GCC 4.4.
testsuite/ChangeLog:
PR middle-end/37908
* gcc.dg/pr37908.c: New test.
* gcc.dg/ia64-sync-1.c: Correct __sync_fetch_and_nand and
__sync_nand_and_fetch results. Add dg-message to look for the warning
about changed semantics of NAND builtin.
(init_si, init_di): Change init value for __sync_fetch_and_nand to -1.
(test_si, test_di): Change expected result of
__sync_nand_and_fetch to ~7.
* gcc.dg/ia64-sync-2.c: Correct __sync_fetch_and_nand and
__sync_nand_and_fetch results. Add dg-message to look for the warning
about changed semantics of NAND builtin.
(init_noret_si, init_noret_di): Change init value for
__sync_fetch_and_nand to -1.
(init_noret_si, init_noret_di): Change expected result of
__sync_nand_and_fetch to ~7.
* gcc.dg/sync-2.c: Correct __sync_fetch_and_nand and
__sync_nand_and_fetch results. Add dg-message to look for the warning
about changed semantics of NAND builtin.
(init_qi, init_qi): Change init value for __sync_fetch_and_nand to -1.
(init_hi, init_hi): Change expected result of
__sync_nand_and_fetch to ~7.
* gcc.dg/sync-3.c: Copy from sync-2.c instead of including
the c source file.
* gcc.c-torture/compile/sync-1.c: Add dg-message to look for the
warning about changed semantics of NAND builtin.
* gcc.c-torture/compile/sync-2.c: Ditto.
* gcc.c-torture/compile/sync-3.c: Ditto.
From-SVN: r141942
Diffstat (limited to 'gcc/c.opt')
| -rw-r--r-- | gcc/c.opt | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -428,6 +428,10 @@ Wstrict-selector-match ObjC ObjC++ Var(warn_strict_selector_match) Warning Warn if type signatures of candidate methods do not match exactly +Wsync-nand +C C++ Var(warn_sync_nand) Init(1) Warning +Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used + Wsynth C++ ObjC++ Var(warn_synth) Warning Deprecated. This switch has no effect |