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31023de6c4
Introduce "inline" variants of ZIR tags: * block => block_inline * repeat => repeat_inline * break => break_inline * condbr => condbr_inline The inline variants perform control flow at compile-time, and they utilize the return value of `Sema.analyzeBody`. `analyzeBody` now returns an Index, not a Ref, which is the ZIR index of a break instruction. This effectively communicates both the intended break target block as well as the operand, allowing parent blocks to find out whether they, in turn, should return the break instruction up the call stack, or accept the operand as the block's result and continue analyzing instructions in the block. Additionally: * removed the deprecated ZIR tag `block_comptime`. * removed `break_void_node` so that all break instructions use the same Data. * zir.Code: remove the `root_start` and `root_len` fields. There is now implied to be a block at index 0 for the root body. This is so that `break_inline` has something to point at and we no longer need the special instruction `break_flat`. * implement source location byteOffset() for .node_offset_if_cond .node_offset_for_cond is probably redundant and can be deleted. We don't have `comptime var` supported yet, so this commit adds a test that at least makes sure the condition is required to be comptime known for `inline while`.