Add write_bytes and arith_offset#4620
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This patch implements the 'write_bytes' compiler intrinsic. It performs a write operation to memory using '__builtin_memset'. gcc/rust/ChangeLog: * backend/rust-compile-intrinsic.cc (generic_intrinsics): Add write_bytes handler to map. * backend/rust-intrinsic-handlers.cc (write_bytes_handler): New function. * backend/rust-intrinsic-handlers.h (write_bytes_handler): New declaration. * typecheck/rust-hir-type-check-intrinsic.cc (IntrinsicChecker::intrinsic_rules): Add write_bytes rule. * util/rust-intrinsic-values.h (class Intrinsics): Add WRITE_BYTES constexpr. gcc/testsuite/ChangeLog: * rust/execute/write-bytes.rs: New test. Signed-off-by: Enes Cevik <enes@nsvke.com>
This patch implements the 'arith_offset' compiler intrinsic. It moves a pointer forward or backward by a given number of elements. It does not cause Undefined Behavior if the pointer goes out of bounds. gcc/rust/ChangeLog: * backend/rust-compile-intrinsic.cc (generic_intrinsics): Add arith_offset handler to map. * backend/rust-intrinsic-handlers.cc (arith_offset_handler): New function. * backend/rust-intrinsic-handlers.h (arith_offset_handler): New declaration. * typecheck/rust-hir-type-check-intrinsic.cc (IntrinsicChecker::intrinsic_rules): Add arith_offset rule. * util/rust-intrinsic-values.h (class Intrinsics): Add ARITH_OFFSET constexpr. gcc/testsuite/ChangeLog: * rust/execute/arith-offset.rs: New test. Signed-off-by: Enes Cevik <enes@nsvke.com>
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This patch implements
arith_offsetandwrite_bytescompiler intrinsics.write_bytes: Lowered to__builtin_memset.arith_offset: Lowered usingPOINTER_PLUS_EXPR.rustcbehavior:arith_offset-> https://godbolt.org/z/j631bMbT7write_bytes-> https://godbolt.org/z/q1K1Txc5v