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| author | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2020-05-28 00:31:15 +0200 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2020-05-28 00:33:04 +0200 |
| commit | fe7ebef7fe4f9acb79658ed9db0749b07efc3105 (patch) | |
| tree | 073db78f4f756d2542b1bd961c0eb9030a016d22 /gcc/fold-const.c | |
| parent | bbaec68c86f8e89a3460cc022c75d4c4179bfb0a (diff) | |
| download | gcc-fe7ebef7fe4f9acb79658ed9db0749b07efc3105.zip gcc-fe7ebef7fe4f9acb79658ed9db0749b07efc3105.tar.gz gcc-fe7ebef7fe4f9acb79658ed9db0749b07efc3105.tar.bz2 | |
Add support for __builtin_bswap128
This patch introduces a new builtin named __builtin_bswap128 on targets
where TImode is supported, i.e. 64-bit targets only in practice. The
implementation simply reuses the existing double word path in optab, so
no routine is added to libgcc (which means that you get two calls to
_bswapdi2 in the worst case).
gcc/ChangeLog:
* builtin-types.def (BT_UINT128): New primitive type.
(BT_FN_UINT128_UINT128): New function type.
* builtins.def (BUILT_IN_BSWAP128): New GCC builtin.
* doc/extend.texi (__builtin_bswap128): Document it.
* builtins.c (expand_builtin): Deal with BUILT_IN_BSWAP128.
(is_inexpensive_builtin): Likewise.
* fold-const-call.c (fold_const_call_ss): Likewise.
* fold-const.c (tree_call_nonnegative_warnv_p): Likewise.
* tree-ssa-ccp.c (evaluate_stmt): Likewise.
* tree-vect-stmts.c (vect_get_data_ptr_increment): Likewise.
(vectorizable_call): Likewise.
* optabs.c (expand_unop): Always use the double word path for it.
* tree-core.h (enum tree_index): Add TI_UINT128_TYPE.
* tree.h (uint128_type_node): New global type.
* tree.c (build_common_tree_nodes): Build it if TImode is supported.
gcc/testsuite/ChangeLog:
* gcc.dg/builtin-bswap-10.c: New test.
* gcc.dg/builtin-bswap-11.c: Likewise.
* gcc.dg/builtin-bswap-12.c: Likewise.
* gcc.target/i386/builtin-bswap-5.c: Likewise.
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index f054871..212d0ba 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -13794,8 +13794,10 @@ tree_call_nonnegative_warnv_p (tree type, combined_fn fn, tree arg0, tree arg1, CASE_CFN_POPCOUNT: CASE_CFN_CLZ: CASE_CFN_CLRSB: + case CFN_BUILT_IN_BSWAP16: case CFN_BUILT_IN_BSWAP32: case CFN_BUILT_IN_BSWAP64: + case CFN_BUILT_IN_BSWAP128: /* Always true. */ return true; |