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zig ir.cpp details: remove the mem_slot mechanism

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Previously, there was hacky code to deal with result locations and how
they work with regards to comptime values and runtime values. In
addition, there was a hacky "mem_slot" mechanism that managed the memory
for local variables, and acted differently depending on comptime vs
runtime situations. All that is deleted in this commit, and as a result,
result locations code has one less complication.

Importantly, this means that a comptime result location is now passed to
a function when it is evaluated at comptime.

This test causes many regressions, and some of the behavior tests are
disabled (commented out) in this commit. Future commits will re-enable
the tests before merging the branch.
This commit is contained in:
Andrew Kelley
2020-01-09 19:15:46 -05:00
parent 0240fd9140
commit fbcee58cfc
6 changed files with 279 additions and 235 deletions
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2
src/codegen.cpp
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@@ -7604,7 +7604,7 @@ static void do_code_gen(CodeGen *g) {
} else {
if (want_sret) {
g->cur_ret_ptr = LLVMGetParam(fn, 0);
} else if (handle_is_ptr(fn_type_id->return_type)) {
} else if (type_has_bits(fn_type_id->return_type)) {
g->cur_ret_ptr = build_alloca(g, fn_type_id->return_type, "result", 0);
// TODO add debug info variable for this
} else {