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5f81c1b793
Currently, normal globals are represented as a PatternBindingDecl and a VarDecl in the AST, directly under the SourceFile:
```
// var variable_name = 42, compiled with -parse-as-library
(source_file ...
(pattern_binding_decl ...
(pattern_entry ...
(pattern_named ... "variable_name") ...
(var_decl "variable_name" ...
```
Top-level globals are represented more like local variables, under a TopLevelCodeDecl. Note that the VarDecl is still at the file scope. In SILGen, this case has some special handling to use the a storage of a global variable, and to avoid cleanups (see `emitInitializationForVarDecl`). Effectively, this means the globals are initialized inside the `main` function.
```
// var variable_name = 42, compiled without -parse-as-library
(source_file ...
(top_level_code_decl ...
(brace_stmt ...
(pattern_binding_decl ...
(pattern_named ... "variable_name") ...
(var_decl "variable_name" ... top_level_global
```
SE-0492 needs top-level globals that have a `@section` annotation to behave like a normal global -- initialization must happen statically, and not in `main`. This PR changes the parsing of those globals to match normal globals, without the TopLevelCodeDecl wrapper. SILGen and IRGen then handles them correctly.
12 lines
756 B
Swift
12 lines
756 B
Swift
// Constant globals should "work" even in top-level code mode.
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// REQUIRES: swift_feature_CompileTimeValues
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// REQUIRES: swift_feature_CompileTimeValuesPreview
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// RUN: %target-swift-frontend -emit-ir -primary-file %s -enable-experimental-feature CompileTimeValues -enable-experimental-feature CompileTimeValuesPreview
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// RUN: %target-swift-frontend -emit-ir -primary-file %s -parse-as-library -enable-experimental-feature CompileTimeValues -enable-experimental-feature CompileTimeValuesPreview
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// RUN: %target-swift-frontend -emit-ir -primary-file %s -enable-experimental-feature CompileTimeValues
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// RUN: %target-swift-frontend -emit-ir -primary-file %s -parse-as-library -enable-experimental-feature CompileTimeValues
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@const let constGlobal: Int = 42
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