From f75262b79f0656ebfac7fb5bd2d6d8e8cce01258 Mon Sep 17 00:00:00 2001 From: Andrew Kelley Date: Mon, 17 Dec 2018 11:05:50 -0500 Subject: fix comptime pointer reinterpretation array index offset closes #1835 --- src/ir.cpp | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) (limited to 'src') diff --git a/src/ir.cpp b/src/ir.cpp index ef7ad221cf..09a9fceabe 100644 --- a/src/ir.cpp +++ b/src/ir.cpp @@ -13744,20 +13744,19 @@ static Error ir_read_const_ptr(IrAnalyze *ira, AstNode *source_node, if (array_val->data.x_array.special != ConstArraySpecialNone) zig_panic("TODO"); size_t elem_size = src_size; - src_size = elem_size * - (array_val->type->data.array.len - ptr_val->data.x_ptr.data.base_array.elem_index); + size_t elem_index = ptr_val->data.x_ptr.data.base_array.elem_index; + src_size = elem_size * (array_val->type->data.array.len - elem_index); if (dst_size > src_size) { ir_add_error_node(ira, source_node, buf_sprintf("attempt to read %zu bytes from %s at index %" ZIG_PRI_usize " which is %zu bytes", - dst_size, buf_ptr(&array_val->type->name), ptr_val->data.x_ptr.data.base_array.elem_index, - src_size)); + dst_size, buf_ptr(&array_val->type->name), elem_index, src_size)); return ErrorSemanticAnalyzeFail; } size_t elem_count = (dst_size % elem_size == 0) ? (dst_size / elem_size) : (dst_size / elem_size + 1); Buf buf = BUF_INIT; buf_resize(&buf, elem_count * elem_size); for (size_t i = 0; i < elem_count; i += 1) { - ConstExprValue *elem_val = &array_val->data.x_array.data.s_none.elements[i]; + ConstExprValue *elem_val = &array_val->data.x_array.data.s_none.elements[elem_index + i]; buf_write_value_bytes(ira->codegen, (uint8_t*)buf_ptr(&buf) + (i * elem_size), elem_val); } buf_read_value_bytes(ira->codegen, (uint8_t*)buf_ptr(&buf), out_val); -- cgit v1.2.3