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Add GlobalInit to blocks to emit initialization instructions for globals (#3687)

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`GlobalInit` block is now static block within a `SemIR` which will be
used to emit initialization instructions for variables in the `Package`
scope.

inst_block_stack now has additional methods to handle `GlobalInit` block
separately, this block can be popped without being finalized allowing to
accumulate between all instances of variables.

At the end of the `check` phase, if this block is not empty , the
function `__global_init` will be added with this block being inserted
into it.

This block is pushed to `inst_block_scope` at the end `BindName`,
allowing instruction to be emitted into it, then popped at the semicolon
(VariableDecl).

This significantly changes the `SemIR` output, that's why this commit
updates a lot of the test cases.
This commit is contained in:
Gıyaseddin Tanrıkulu
2024-02-09 16:21:57 +00:00
committed by GitHub
parent 475ecca339
commit bdff7ccf28
94 changed files with 1256 additions and 604 deletions
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toolchain/check/testdata/if_expr/fail_not_in_function.carbon
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@@ -43,7 +43,7 @@ class C {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %.loc17: i32 = block_arg <unexpected instblockref block5>
// CHECK:STDOUT: %.loc17: i32 = block_arg <unexpected instblockref block6>
// CHECK:STDOUT: %x: i32 = bind_name x, %.loc17
// CHECK:STDOUT: %C.decl = class_decl @C, ()
// CHECK:STDOUT: }