1; RUN: llvm-as < %s >%t1 2; RUN: llvm-lto -o %t2 %t1 3; RUN: llvm-nm %t2 | FileCheck %s -check-prefix=NOEXPORT 4; RUN: llvm-lto -o %t3 -exported-symbol=main %t1 5; RUN: llvm-nm %t3 | FileCheck %s -check-prefix=EXPORT 6 7target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 8target triple = "x86_64-unknown-linux-gnu" 9 10module asm ".text" 11module asm ".align 16, 0x90" 12module asm ".type PR14512, @function" 13module asm "PR14512:.cfi_startproc" 14module asm "ret" 15module asm ".cfi_endproc" 16 17declare void @PR14512() 18 19; Without -exported-symbol, main should be eliminated by LTO. 20; With -exported-symbol=main, main should be preserved by LTO. 21define i32 @main(i32 %argc, i8** %argv) { 22; NOEXPORT-NOT: main 23; EXPORT: main 24 call void @PR14512() 25 ret i32 0 26} 27 28; RUN: llvm-lto -o %t -dso-symbol=zed1 -dso-symbol=zed2 %t1 -O0 29; RUN: llvm-nm %t | FileCheck %s -check-prefix=ZED1_AND_ZED2 30; ZED1_AND_ZED2: V zed1 31@zed1 = linkonce_odr global i32 42 32define i32* @get_zed1() { 33 ret i32* @zed1 34} 35 36; ZED1_AND_ZED2: r zed2 37@zed2 = linkonce_odr unnamed_addr constant i32 42 38 39define i32 @useZed2() { 40 %x = load i32, i32* @zed2 41 ret i32 %x 42} 43