* system.h (CASE_USE_BIT_TESTS): Poison.
* stmt.c (CASE_USE_BIT_TESTS): Fold away into its only user ...
(expand_switch_using_bit_tests_p): ...here.
* doc/tm.texi.in (CASE_USE_BIT_TESTS): Remove documentation.
* doc/tm.texi (CASE_USE_BIT_TESTS): Regenerate.
From-SVN: r189078
+2012-06-29 Steven Bosscher <steven@gcc.gnu.org>
+
+ * system.h (CASE_USE_BIT_TESTS): Poison.
+ * stmt.c (CASE_USE_BIT_TESTS): Fold away into its only user ...
+ (expand_switch_using_bit_tests_p): ...here.
+ * doc/tm.texi.in (CASE_USE_BIT_TESTS): Remove documentation.
+ * doc/tm.texi (CASE_USE_BIT_TESTS): Regenerate.
+
2012-06-29 Steven Bosscher <steven@gcc.gnu.org>
* system.h (IFCVT_EXTRA_FIELDS): Poison.
five otherwise. This is best for most machines.
@end deftypefn
-@defmac CASE_USE_BIT_TESTS
-Define this macro to be a C expression to indicate whether C switch
-statements may be implemented by a sequence of bit tests. This is
-advantageous on processors that can efficiently implement left shift
-of 1 by the number of bits held in a register, but inappropriate on
-targets that would require a loop. By default, this macro returns
-@code{true} if the target defines an @code{ashlsi3} pattern, and
-@code{false} otherwise.
-@end defmac
-
@defmac WORD_REGISTER_OPERATIONS
Define this macro if operations between registers with integral mode
smaller than a word are always performed on the entire register.
five otherwise. This is best for most machines.
@end deftypefn
-@defmac CASE_USE_BIT_TESTS
-Define this macro to be a C expression to indicate whether C switch
-statements may be implemented by a sequence of bit tests. This is
-advantageous on processors that can efficiently implement left shift
-of 1 by the number of bits held in a register, but inappropriate on
-targets that would require a loop. By default, this macro returns
-@code{true} if the target defines an @code{ashlsi3} pattern, and
-@code{false} otherwise.
-@end defmac
-
@defmac WORD_REGISTER_OPERATIONS
Define this macro if operations between registers with integral mode
smaller than a word are always performed on the entire register.
/* Maximum number of case bit tests. */
#define MAX_CASE_BIT_TESTS 3
-/* By default, enable case bit tests on targets with ashlsi3. */
-#ifndef CASE_USE_BIT_TESTS
-#define CASE_USE_BIT_TESTS (optab_handler (ashl_optab, word_mode) \
- != CODE_FOR_nothing)
-#endif
-
-
/* A case_bit_test represents a set of case nodes that may be
selected from using a bit-wise comparison. HI and LO hold
the integer to be tested against, LABEL contains the label
expand_switch_using_bit_tests_p (tree index_expr, tree range,
unsigned int uniq, unsigned int count)
{
- return (CASE_USE_BIT_TESTS
- && ! TREE_CONSTANT (index_expr)
+ if (optab_handler (ashl_optab, word_mode) == CODE_FOR_nothing)
+ return false;
+
+ return (! TREE_CONSTANT (index_expr)
&& compare_tree_int (range, GET_MODE_BITSIZE (word_mode)) < 0
&& compare_tree_int (range, 0) > 0
&& lshift_cheap_p ()
TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS \
IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP \
UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP \
- USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS
+ USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
+ CASE_USE_BIT_TESTS
/* Hooks that are no longer used. */
#pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE \