diff options
Diffstat (limited to 'src/ir.cpp')
| -rw-r--r-- | src/ir.cpp | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/src/ir.cpp b/src/ir.cpp index c9262038e0..92cdd8c891 100644 --- a/src/ir.cpp +++ b/src/ir.cpp @@ -14331,15 +14331,15 @@ static Error ir_read_const_ptr(IrAnalyze *ira, CodeGen *codegen, AstNode *source if ((err = type_resolve(codegen, out_val->type, ResolveStatusSizeKnown))) return ErrorSemanticAnalyzeFail; - size_t src_size = type_size(codegen, pointee->type); - size_t dst_size = type_size(codegen, out_val->type); - - if (src_size == dst_size && types_have_same_zig_comptime_repr(pointee->type, out_val->type)) { - copy_const_val(out_val, pointee, ptr_val->data.x_ptr.mut == ConstPtrMutComptimeConst); - return ErrorNone; - } + // We don't need to read the padding bytes, so we look at type_size_store bytes + size_t src_size = type_size_store(codegen, pointee->type); + size_t dst_size = type_size_store(codegen, out_val->type); if (dst_size <= src_size) { + if (types_have_same_zig_comptime_repr(pointee->type, out_val->type)) { + copy_const_val(out_val, pointee, ptr_val->data.x_ptr.mut == ConstPtrMutComptimeConst); + return ErrorNone; + } Buf buf = BUF_INIT; buf_resize(&buf, src_size); buf_write_value_bytes(codegen, (uint8_t*)buf_ptr(&buf), pointee); @@ -15798,6 +15798,8 @@ static IrInstruction *ir_analyze_instruction_typeof(IrAnalyze *ira, IrInstructio static IrInstruction *ir_analyze_instruction_to_ptr_type(IrAnalyze *ira, IrInstructionToPtrType *to_ptr_type_instruction) { + Error err; + IrInstruction *value = to_ptr_type_instruction->value->child; ZigType *type_entry = value->value.type; if (type_is_invalid(type_entry)) @@ -15813,7 +15815,17 @@ static IrInstruction *ir_analyze_instruction_to_ptr_type(IrAnalyze *ira, ptr_type = get_pointer_to_type(ira->codegen, type_entry->data.pointer.child_type->data.array.child_type, type_entry->data.pointer.is_const); } else if (is_slice(type_entry)) { - ptr_type = adjust_ptr_len(ira->codegen, type_entry->data.structure.fields[0].type_entry, PtrLenSingle); + ZigType *slice_ptr_type = type_entry->data.structure.fields[0].type_entry; + ptr_type = adjust_ptr_len(ira->codegen, slice_ptr_type, PtrLenSingle); + // If the pointer is over-aligned, we may have to reduce it based on the alignment of the element type. + if (slice_ptr_type->data.pointer.explicit_alignment != 0) { + ZigType *elem_type = slice_ptr_type->data.pointer.child_type; + if ((err = type_resolve(ira->codegen, elem_type, ResolveStatusAlignmentKnown))) + return ira->codegen->invalid_instruction; + uint32_t elem_align = get_abi_alignment(ira->codegen, elem_type); + uint32_t reduced_align = min(elem_align, slice_ptr_type->data.pointer.explicit_alignment); + ptr_type = adjust_ptr_align(ira->codegen, ptr_type, reduced_align); + } } else if (type_entry->id == ZigTypeIdArgTuple) { ConstExprValue *arg_tuple_val = ir_resolve_const(ira, value, UndefBad); if (!arg_tuple_val) |