diff options
Diffstat (limited to 'compiler/rustc_codegen_llvm/src/intrinsic.rs')
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/intrinsic.rs | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/compiler/rustc_codegen_llvm/src/intrinsic.rs b/compiler/rustc_codegen_llvm/src/intrinsic.rs index 623c08ce86b..b421d80b1bd 100644 --- a/compiler/rustc_codegen_llvm/src/intrinsic.rs +++ b/compiler/rustc_codegen_llvm/src/intrinsic.rs @@ -2096,29 +2096,28 @@ fn generic_simd_intrinsic<'ll, 'tcx>( sym::simd_cttz => "cttz", _ => unreachable!(), }; - let llvm_intrinsic = &format!( - "llvm.{}.v{}i{}", - intrinsic_name, - in_len, - in_elem.int_size_and_signed(bx.tcx()).0.bits(), - ); + let int_size = in_elem.int_size_and_signed(bx.tcx()).0.bits(); + let llvm_intrinsic = &format!("llvm.{}.v{}i{}", intrinsic_name, in_len, int_size,); - return Ok(if matches!(name, sym::simd_ctlz | sym::simd_cttz) { + return if name == sym::simd_bswap && int_size == 8 { + // byte swap is no-op for i8/u8 + Ok(args[0].immediate()) + } else if matches!(name, sym::simd_ctlz | sym::simd_cttz) { let fn_ty = bx.type_func(&[vec_ty, bx.type_i1()], vec_ty); let f = bx.declare_cfn(llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty); - bx.call( + Ok(bx.call( fn_ty, None, None, f, &[args[0].immediate(), bx.const_int(bx.type_i1(), 0)], None, - ) + )) } else { let fn_ty = bx.type_func(&[vec_ty], vec_ty); let f = bx.declare_cfn(llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty); - bx.call(fn_ty, None, None, f, &[args[0].immediate()], None) - }); + Ok(bx.call(fn_ty, None, None, f, &[args[0].immediate()], None)) + }; } if name == sym::simd_arith_offset { |