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| author | clyon <clyon@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-09-26 13:42:47 +0000 |
|---|---|---|
| committer | clyon <clyon@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-09-26 13:42:47 +0000 |
| commit | f811051bf87b1de7804c19c8192d0d099d157145 (patch) | |
| tree | 5de5ececa60b97c5b81f927d45e3dbbf008c91e5 /gcc/tree-ssa-math-opts.c | |
| parent | 567510a28cdfeea8e43b8e5d6b72da1abe10c7c3 (diff) | |
| download | gcc-f811051bf87b1de7804c19c8192d0d099d157145.tar.gz | |
2012-09-26 Christophe Lyon <christophe.lyon@linaro.org>
gcc/
* tree-ssa-math-opts.c (bswap_stats): Add found_16bit field.
(execute_optimize_bswap): Add support for builtin_bswap16.
gcc/testsuite/
* gcc.target/arm/builtin-bswap16-1.c: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@191760 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-math-opts.c')
| -rw-r--r-- | gcc/tree-ssa-math-opts.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/gcc/tree-ssa-math-opts.c b/gcc/tree-ssa-math-opts.c index 16ff397d47d..d9f4e9ecaf0 100644 --- a/gcc/tree-ssa-math-opts.c +++ b/gcc/tree-ssa-math-opts.c @@ -154,6 +154,9 @@ static struct static struct { + /* Number of hand-written 16-bit bswaps found. */ + int found_16bit; + /* Number of hand-written 32-bit bswaps found. */ int found_32bit; @@ -1803,9 +1806,9 @@ static unsigned int execute_optimize_bswap (void) { basic_block bb; - bool bswap32_p, bswap64_p; + bool bswap16_p, bswap32_p, bswap64_p; bool changed = false; - tree bswap32_type = NULL_TREE, bswap64_type = NULL_TREE; + tree bswap16_type = NULL_TREE, bswap32_type = NULL_TREE, bswap64_type = NULL_TREE; if (BITS_PER_UNIT != 8) return 0; @@ -1813,17 +1816,25 @@ execute_optimize_bswap (void) if (sizeof (HOST_WIDEST_INT) < 8) return 0; + bswap16_p = (builtin_decl_explicit_p (BUILT_IN_BSWAP16) + && optab_handler (bswap_optab, HImode) != CODE_FOR_nothing); bswap32_p = (builtin_decl_explicit_p (BUILT_IN_BSWAP32) && optab_handler (bswap_optab, SImode) != CODE_FOR_nothing); bswap64_p = (builtin_decl_explicit_p (BUILT_IN_BSWAP64) && (optab_handler (bswap_optab, DImode) != CODE_FOR_nothing || (bswap32_p && word_mode == SImode))); - if (!bswap32_p && !bswap64_p) + if (!bswap16_p && !bswap32_p && !bswap64_p) return 0; /* Determine the argument type of the builtins. The code later on assumes that the return and argument type are the same. */ + if (bswap16_p) + { + tree fndecl = builtin_decl_explicit (BUILT_IN_BSWAP16); + bswap16_type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (fndecl))); + } + if (bswap32_p) { tree fndecl = builtin_decl_explicit (BUILT_IN_BSWAP32); @@ -1863,6 +1874,13 @@ execute_optimize_bswap (void) switch (type_size) { + case 16: + if (bswap16_p) + { + fndecl = builtin_decl_explicit (BUILT_IN_BSWAP16); + bswap_type = bswap16_type; + } + break; case 32: if (bswap32_p) { @@ -1890,7 +1908,9 @@ execute_optimize_bswap (void) continue; changed = true; - if (type_size == 32) + if (type_size == 16) + bswap_stats.found_16bit++; + else if (type_size == 32) bswap_stats.found_32bit++; else bswap_stats.found_64bit++; @@ -1935,6 +1955,8 @@ execute_optimize_bswap (void) } } + statistics_counter_event (cfun, "16-bit bswap implementations found", + bswap_stats.found_16bit); statistics_counter_event (cfun, "32-bit bswap implementations found", bswap_stats.found_32bit); statistics_counter_event (cfun, "64-bit bswap implementations found", |