1; REQUIRES: x86 2; RUN: rm -rf %t; split-file %s %t 3 4;; Check that `-exported_symbol` causes all non-exported symbols to be marked 5;; as hidden before LTO. We don't want to downgrade them to private extern only 6;; after LTO runs as that likely causes LTO to miss optimization opportunities. 7 8; RUN: llvm-as %t/foo.ll -o %t/foo.o 9; RUN: llvm-as %t/refs-foo.ll -o %t/refs-foo.o 10 11; RUN: %lld -lSystem -dylib %t/foo.o %t/refs-foo.o -o %t/test-fulllto \ 12; RUN: -save-temps -exported_symbol _refs_foo -exported_symbol _same_module_caller 13 14; RUN: llvm-dis %t/test-fulllto.0.2.internalize.bc -o - | FileCheck %s --check-prefix=FULLLTO 15; RUN: llvm-objdump --macho --syms %t/test-fulllto | FileCheck %s --check-prefix=FULLLTO-SYMS 16 17; FULLLTO: define internal void @foo() 18; FULLLTO: define internal void @same_module_callee() 19; FULLLTO: define dso_local void @same_module_caller() 20; FULLLTO: define dso_local void @refs_foo() 21 22;; LTO is able to elide the hidden symbols, and they will be entirely absent 23;; from the final symbol table. 24 25; FULLLTO-SYMS: SYMBOL TABLE: 26; FULLLTO-SYMS: g F __TEXT,__text _refs_foo 27; FULLLTO-SYMS: g F __TEXT,__text _same_module_caller 28; FULLLTO-SYMS: *UND* dyld_stub_binder 29; FULLLTO-SYMS-EMPTY: 30 31;; ThinLTO is unable to internalize symbols that are referenced from another 32;; module. Verify that we still mark the final symbol as private extern. 33 34; RUN: opt -module-summary %t/foo.ll -o %t/foo.thinlto.o 35; RUN: opt -module-summary %t/refs-foo.ll -o %t/refs-foo.thinlto.o 36 37; RUN: %lld -lSystem -dylib %t/foo.thinlto.o %t/refs-foo.thinlto.o -o %t/test-thinlto \ 38; RUN: -save-temps -exported_symbol _refs_foo -exported_symbol _same_module_caller 39 40; RUN: llvm-dis %t/foo.thinlto.o.2.internalize.bc -o - | FileCheck %s --check-prefix=THINLTO-FOO 41; RUN: llvm-dis %t/refs-foo.thinlto.o.2.internalize.bc -o - | FileCheck %s --check-prefix=THINLTO-REFS-FOO 42; RUN: llvm-objdump --macho --syms %t/test-thinlto | FileCheck %s --check-prefix=THINLTO-SYMS 43 44; THINLTO-FOO: define dso_local void @foo() 45; THINLTO-FOO: define internal void @same_module_callee() 46; THINLTO-REFS-FOO: declare dso_local void @foo() 47; THINLTO-REFS-FOO: define dso_local void @refs_foo() 48 49; THINLTO-SYMS: l F __TEXT,__text .hidden _foo 50; THINLTO-SYMS: g F __TEXT,__text _refs_foo 51; THINLTO-SYMS: g F __TEXT,__text _same_module_caller 52 53;--- foo.ll 54 55target triple = "x86_64-apple-macosx10.15.0" 56target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 57 58define void @foo() { 59 ret void 60} 61 62define void @same_module_callee() { 63 ret void 64} 65 66define void @same_module_caller() { 67 call void @same_module_callee() 68 ret void 69} 70 71;--- refs-foo.ll 72 73target triple = "x86_64-apple-macosx10.15.0" 74target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 75 76declare void @foo() 77 78define void @refs_foo() { 79 call void @foo() 80 ret void 81} 82