derek.holloway
7502bf64a4
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82 lines
2.8 KiB
LLVM
82 lines
2.8 KiB
LLVM
; REQUIRES: x86
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; RUN: rm -rf %t; split-file %s %t
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;; Check that `-exported_symbol` causes all non-exported symbols to be marked
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;; as hidden before LTO. We don't want to downgrade them to private extern only
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;; after LTO runs as that likely causes LTO to miss optimization opportunities.
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; RUN: llvm-as %t/foo.ll -o %t/foo.o
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; RUN: llvm-as %t/refs-foo.ll -o %t/refs-foo.o
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; RUN: %lld -lSystem -dylib %t/foo.o %t/refs-foo.o -o %t/test-fulllto \
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; RUN: -save-temps -exported_symbol _refs_foo -exported_symbol _same_module_caller
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; RUN: llvm-dis %t/test-fulllto.0.2.internalize.bc -o - | FileCheck %s --check-prefix=FULLLTO
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; RUN: llvm-objdump --macho --syms %t/test-fulllto | FileCheck %s --check-prefix=FULLLTO-SYMS
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; FULLLTO: define internal void @foo()
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; FULLLTO: define internal void @same_module_callee()
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; FULLLTO: define dso_local void @same_module_caller()
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; FULLLTO: define dso_local void @refs_foo()
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;; LTO is able to elide the hidden symbols, and they will be entirely absent
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;; from the final symbol table.
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; FULLLTO-SYMS: SYMBOL TABLE:
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; FULLLTO-SYMS: g F __TEXT,__text _refs_foo
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; FULLLTO-SYMS: g F __TEXT,__text _same_module_caller
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; FULLLTO-SYMS: *UND* dyld_stub_binder
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; FULLLTO-SYMS-EMPTY:
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;; ThinLTO is unable to internalize symbols that are referenced from another
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;; module. Verify that we still mark the final symbol as private extern.
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; RUN: opt -module-summary %t/foo.ll -o %t/foo.thinlto.o
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; RUN: opt -module-summary %t/refs-foo.ll -o %t/refs-foo.thinlto.o
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; RUN: %lld -lSystem -dylib %t/foo.thinlto.o %t/refs-foo.thinlto.o -o %t/test-thinlto \
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; RUN: -save-temps -exported_symbol _refs_foo -exported_symbol _same_module_caller
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; RUN: llvm-dis %t/foo.thinlto.o.2.internalize.bc -o - | FileCheck %s --check-prefix=THINLTO-FOO
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; RUN: llvm-dis %t/refs-foo.thinlto.o.2.internalize.bc -o - | FileCheck %s --check-prefix=THINLTO-REFS-FOO
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; RUN: llvm-objdump --macho --syms %t/test-thinlto | FileCheck %s --check-prefix=THINLTO-SYMS
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; THINLTO-FOO: define dso_local void @foo()
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; THINLTO-FOO: define internal void @same_module_callee()
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; THINLTO-REFS-FOO: declare dso_local void @foo()
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; THINLTO-REFS-FOO: define dso_local void @refs_foo()
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; THINLTO-SYMS: l F __TEXT,__text .hidden _foo
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; THINLTO-SYMS: g F __TEXT,__text _refs_foo
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; THINLTO-SYMS: g F __TEXT,__text _same_module_caller
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;--- foo.ll
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target triple = "x86_64-apple-macosx10.15.0"
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target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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define void @foo() {
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ret void
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}
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define void @same_module_callee() {
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ret void
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}
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define void @same_module_caller() {
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call void @same_module_callee()
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ret void
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}
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;--- refs-foo.ll
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target triple = "x86_64-apple-macosx10.15.0"
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target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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declare void @foo()
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define void @refs_foo() {
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call void @foo()
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ret void
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}
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