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| author | Arthur Cohen <arthur.cohen@embecosm.com> | 2022-08-10 16:08:38 +0200 |
|---|---|---|
| committer | Arthur Cohen <arthur.cohen@embecosm.com> | 2022-08-16 11:29:00 +0200 |
| commit | f68ecc7e5914ef99b22c258e404c73b2401f9d89 (patch) | |
| tree | f790a4bc549fcaee5e73a566f1507a5eae7b525b /gcc/rust/backend/rust-builtins.h | |
| parent | 021e4953390da748515debfc8973149457d3118a (diff) | |
| download | gcc-f68ecc7e5914ef99b22c258e404c73b2401f9d89.zip gcc-f68ecc7e5914ef99b22c258e404c73b2401f9d89.tar.gz gcc-f68ecc7e5914ef99b22c258e404c73b2401f9d89.tar.bz2 | |
intrinsics: Add copy_nonoverlapping<T>
This intrinsic is similar to C's memcpy (or in our case, GCC's
__builtin_memcpy) with the order of arguments swapped and knowledge
about the type of the operands. So we can desugar the following calls:
`copy_nonoverlapping::<T>(src, dst, count)`
can be converted to
`__builtin_memcpy(dst, src, count * size_of::<T>())`
Finally, unlike most intrinsics, copy_nonoverlapping must be marked as impure
Co-authored-by: philbert <philip.herron@embecosm.com>
Diffstat (limited to 'gcc/rust/backend/rust-builtins.h')
| -rw-r--r-- | gcc/rust/backend/rust-builtins.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/rust/backend/rust-builtins.h b/gcc/rust/backend/rust-builtins.h index 13c16d1..2bfa6c6 100644 --- a/gcc/rust/backend/rust-builtins.h +++ b/gcc/rust/backend/rust-builtins.h @@ -122,6 +122,14 @@ private: define_builtin ("breakpoint", BUILT_IN_TRAP, "__builtin_trap", "breakpoint", build_function_type (void_type_node, void_list_node), builtin_const | builtin_noreturn); + + define_builtin ( + "memcpy", BUILT_IN_MEMCPY, "__builtin_memcpy", "memcpy", + build_function_type_list (build_pointer_type (void_type_node), + build_pointer_type (void_type_node), + build_pointer_type (void_type_node), + size_type_node, NULL_TREE), + 0); } // Define a builtin function. BCODE is the builtin function code |