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| author | Steven Bosscher <steven@gcc.gnu.org> | 2012-06-29 14:48:08 +0000 |
|---|---|---|
| committer | Steven Bosscher <steven@gcc.gnu.org> | 2012-06-29 14:48:08 +0000 |
| commit | cc193fba85953801d140e87c636a208767b75dfa (patch) | |
| tree | ff5846aca298075f454abf75c2500eae0de6daa0 /gcc/stmt.c | |
| parent | 7211c82f34d7962c2af32da025aa55c4c858e528 (diff) | |
| download | gcc-cc193fba85953801d140e87c636a208767b75dfa.zip gcc-cc193fba85953801d140e87c636a208767b75dfa.tar.gz gcc-cc193fba85953801d140e87c636a208767b75dfa.tar.bz2 | |
system.h (CASE_USE_BIT_TESTS): Poison.
* 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
Diffstat (limited to 'gcc/stmt.c')
| -rw-r--r-- | gcc/stmt.c | 13 |
1 files changed, 4 insertions, 9 deletions
@@ -1722,13 +1722,6 @@ add_case_node (struct case_node *head, tree type, tree low, tree high, /* 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 @@ -1888,8 +1881,10 @@ bool 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 () |