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[embedded] Avoid marking all public symbols as 'do not dead strip' in embedded Swift

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This commit is contained in:
Kuba Mracek
2023-09-12 22:25:27 -07:00
parent 163d5bceff
commit d90cf10fae
2 changed files with 40 additions and 0 deletions
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3
lib/Frontend/CompilerInvocation.cpp
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@@ -3096,6 +3096,9 @@ bool CompilerInvocation::parseArgs(
// Now that we've parsed everything, setup some inter-option-dependent state. // Now that we've parsed everything, setup some inter-option-dependent state.
setIRGenOutputOptsFromFrontendOptions(IRGenOpts, FrontendOpts); setIRGenOutputOptsFromFrontendOptions(IRGenOpts, FrontendOpts);
setBridgingHeaderFromFrontendOptions(ClangImporterOpts, FrontendOpts); setBridgingHeaderFromFrontendOptions(ClangImporterOpts, FrontendOpts);
if (LangOpts.hasFeature(Feature::Embedded)) {
IRGenOpts.InternalizeAtLink = true;
}
return false; return false;
} }

37
test/embedded/internalize-no-stdlib.swift Normal file
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@@ -0,0 +1,37 @@
// This test checks that embedded Swift doesn't mark public functions/symbols as llvm.used / llvm.compiler.used
// RUN: %target-swift-emit-ir %s -parse-stdlib -enable-experimental-feature Embedded -target arm64e-apple-none-elf | %FileCheck %s --check-prefix CHECK-ELF
// RUN: %target-swift-emit-ir %s -parse-stdlib -enable-experimental-feature Embedded -target arm64e-apple-none-macho | %FileCheck %s --check-prefix CHECK-MACHO
// REQUIRES: swift_in_compiler
struct Bool {}
protocol Player {
func play()
var canPlay: Bool { get }
}
struct Concrete : Player {
func play() { }
var canPlay: Bool { Bool() }
}
func start(p: some Player) {
p.play()
}
public func main() {
start(p: Concrete())
}
// CHECK-ELF: @"\01l_entry_point" =
// CHECK-ELF: @__swift_reflection_version =
// CHECK-ELF: @_swift1_autolink_entries =
// CHECK-ELF: @llvm.compiler.used = appending global [3 x ptr] [ptr @"\01l_entry_point", ptr @__swift_reflection_version, ptr @_swift1_autolink_entries], section "llvm.metadata"
// CHECK-ELF-NOT: @llvm.used
// CHECK-MACHO: @"\01l_entry_point" =
// CHECK-MACHO: @__swift_reflection_version =
// CHECK-MACHO-NOT: @llvm.compiler.used
// CHECK-MACHO: @llvm.used = appending global [2 x ptr] [ptr @"\01l_entry_point", ptr @__swift_reflection_version], section "llvm.metadata"