* Reorganize the global value kinds.
This:
- renames "deref" global values to "load" and gives it a offset that works
like the "load" instructions' does
- adds an explicit "iadd_imm" global value kind, which replaces the
builtin iadd in "vmctx" and "deref" global values.
- also renames "globalsym" to "symbol"
This makes several changes:
- It adds an index_type to heap declarations, allowing heaps to specify the
type for indexing. This also anticipates 64-bit heap support.
- It adds a memory_type to deref global values, allowing deref globals to
have types other than pointers. This is used to allow the bound variable
in dynamic heaps to have type i32, to match the index type in heaps
with i32 index type.
- And, it fixes heap legalization to do the bounds check in the heap's
index type.
* fix error not reported if at least one other error expected.
* Fixed unused extern crate error if wasm feature is not enabled.
* No longer reporting deref cycles multiple times.
* Fix filetest type_check.clif.
* Switched comparison order for perf.
* Fixed isa/riscv/verify-encoding.clif filetest.
* Fixed error reporting.
* Fixed compile time error when wasm feature is disabled.
* Fixed valid instructions not being printed in print_function_error.
* Fixed errors print_function_error not writing valid instructions after end.
* Made multiple checks non-fatal.
* verify_global_values is no longer fatal.
* Slightly better formatting of errors in pretty_verifier_error.
* clippy: Allow subsec_nanos usage for now.
The recommendation from clippy requires Rust 1.27, but we currently
support Rust 1.25 and later.
* Simplify ref pattern matches.
This was recommended by clippy.
It appears that having the meta directory crate be inside the codegen
directory is not enough to allow codegen to depend on it without it
being published. So, let's just publish it.
* Remove reserved_reg functionality.
This wasn't implemented, and if we need it in the future, it seems like
it would be better to extend the concept of global values to cover this.
* Use GlobalValue::reserved_value() for sentinal values.
