From 1e61e5f4041859859dc5b6f1936cccfd32e9c3a5 Mon Sep 17 00:00:00 2001 From: LemonBoy Date: Thu, 2 Jan 2020 12:56:46 +0100 Subject: Don't ptrCast a result-location assignment to _ After #4010 doing `_ = @bitCast(...)` triggered a nonsensical compiler error. --- src/ir.cpp | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) (limited to 'src/ir.cpp') diff --git a/src/ir.cpp b/src/ir.cpp index fbd9ba7ac0..08efdbd6e4 100644 --- a/src/ir.cpp +++ b/src/ir.cpp @@ -17394,11 +17394,23 @@ static IrInstruction *ir_resolve_result_raw(IrAnalyze *ira, IrInstruction *suspe } ZigType *parent_ptr_type = parent_result_loc->value->type; assert(parent_ptr_type->id == ZigTypeIdPointer); - if ((err = type_resolve(ira->codegen, parent_ptr_type->data.pointer.child_type, - ResolveStatusAlignmentKnown))) - { + ZigType *child_type = parent_ptr_type->data.pointer.child_type; + + bool has_bits; + if ((err = type_has_bits2(ira->codegen, child_type, &has_bits))) { + return ira->codegen->invalid_instruction; + } + + // This happens when the bitCast result is assigned to _ + if (!has_bits) { + assert(allow_discard); + return parent_result_loc; + } + + if ((err = type_resolve(ira->codegen, child_type, ResolveStatusAlignmentKnown))) { return ira->codegen->invalid_instruction; } + uint64_t parent_ptr_align = get_ptr_align(ira->codegen, parent_ptr_type); if ((err = type_resolve(ira->codegen, value_type, ResolveStatusAlignmentKnown))) { return ira->codegen->invalid_instruction; -- cgit v1.2.3