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c89df9ec98
Add a new mandatory BooleanLiteralFolding pass which constant folds conditional branches with boolean literals as operands.
```
%1 = integer_literal -1
%2 = apply %bool_init(%1) // Bool.init(_builtinBooleanLiteral:)
%3 = struct_extract %2, #Bool._value
cond_br %3, bb1, bb2
```
->
```
...
br bb1
```
This pass is intended to run before DefiniteInitialization, where mandatory inlining and constant folding didn't run, yet (which would perform this kind of optimization).
This optimization is required to let DefiniteInitialization handle boolean literals correctly.
For example in infinite loops:
```
init() {
while true { // DI need to know that there is no loop exit from this while-statement
if some_condition {
member_field = init_value
break
}
}
}
```
41 lines
2.0 KiB
Swift
41 lines
2.0 KiB
Swift
// REQUIRES: swift_swift_parser, executable_test, asserts
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// RUN: %empty-directory(%t)
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// RUN: %host-build-swift -swift-version 5 -emit-library -o %t/%target-library-name(MacroDefinition) -module-name=MacroDefinition %S/Inputs/syntax_macro_definitions.swift -g -no-toolchain-stdlib-rpath -swift-version 5
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// Diagnostics testing
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// RUN: %target-typecheck-verify-swift -swift-version 5 -enable-experimental-feature CodeItemMacros -load-plugin-library %t/%target-library-name(MacroDefinition) -module-name MacroUser -DTEST_DIAGNOSTICS
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// RUN: %target-swift-frontend -swift-version 5 -emit-sil -enable-experimental-feature CodeItemMacros -load-plugin-library %t/%target-library-name(MacroDefinition) -module-name MacroUser -DTEST_DIAGNOSTICS -serialize-diagnostics-path %t/macro_expand_codeitems.dia %s -emit-macro-expansion-files no-diagnostics
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// RUN: c-index-test -read-diagnostics %t/macro_expand_codeitems.dia 2>&1 | %FileCheck -check-prefix CHECK-DIAGS %s
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// Execution testing
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// RUN: %target-build-swift -swift-version 5 -g -enable-experimental-feature CodeItemMacros -load-plugin-library %t/%target-library-name(MacroDefinition) %s -o %t/main -module-name MacroUser
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// RUN: %target-codesign %t/main
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// RUN: %target-run %t/main | %FileCheck %s
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@freestanding(codeItem)
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macro codeItems() = #externalMacro(module: "MacroDefinition", type: "SimpleCodeItemMacro")
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func testFreestandingMacroExpansion() {
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func usedInExpandedStmt() { print("from usedInExpandedStmt") }
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// CHECK: from stmt
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// CHECK: from usedInExpandedStmt
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// CHECK: from expr
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// CHECK-DIAGS: struct $s9MacroUser016testFreestandingA9ExpansionyyF9codeItemsfMf0_3foofMu_ {
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// CHECK-DIAGS: END CONTENTS OF FILE
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#codeItems
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// CHECK: from stmt
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// CHECK: from usedInExpandedStmt
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// CHECK: from expr
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#codeItems
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}
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testFreestandingMacroExpansion()
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@freestanding(codeItem) macro varDecl() = #externalMacro(module: "MacroDefinition", type: "VarDeclMacro")
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func testVarDecl() {
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func use<T>(_ t: T) {}
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#varDecl()
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}
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