1; REQUIRES: x86 2;; LTO-generated relocatable files may reference _GLOBAL_OFFSET_TABLE_ while 3;; the IR does not mention _GLOBAL_OFFSET_TABLE_. 4;; Test that there is no spurious "undefined symbol" error. 5 6; RUN: rm -rf %t && split-file %s %t && cd %t 7; RUN: opt -module-summary b.ll -o b.bc 8 9;; Test Thin LTO. 10; RUN: cat a.ll medium.ll | opt -module-summary - -o medium.bc 11; RUN: ld.lld -pie --no-relax medium.bc b.bc -o medium 12; RUN: llvm-objdump -dt medium | FileCheck %s 13 14;; Test regular LTO. 15; RUN: cat a.ll large.ll | llvm-as - -o large.bc 16; RUN: ld.lld -pie large.bc b.bc -o large 17; RUN: llvm-objdump -dt large | FileCheck %s 18 19;; Explicit reference of _GLOBAL_OFFSET_TABLE_ is fine. 20; RUN: cat a.ll medium.ll ref.ll | opt -module-summary - -o ref.bc 21; RUN: ld.lld -pie -u ref ref.bc b.bc -y _GLOBAL_OFFSET_TABLE_ -o ref 2>&1 | FileCheck %s --check-prefix=TRACE 22; RUN: llvm-objdump -dt ref | FileCheck %s 23 24; TRACE: ref.bc: reference to _GLOBAL_OFFSET_TABLE_ 25; TRACE-NEXT: ref.bc: reference to _GLOBAL_OFFSET_TABLE_ 26; TRACE-NEXT: <internal>: definition of _GLOBAL_OFFSET_TABLE_ 27; TRACE-NEXT: ref.lto.ref.o: reference to _GLOBAL_OFFSET_TABLE_ 28 29;; The IR symbol table references _GLOBAL_OFFSET_TABLE_, which causes lld to define the symbol. 30; CHECK: .got.plt 0000000000000000 .hidden _GLOBAL_OFFSET_TABLE_ 31; CHECK: movabsq 32 33;--- a.ll 34target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128" 35target triple = "x86_64-unknown-linux-gnu" 36 37@i = external global i32 38 39define dso_local void @_start() { 40entry: 41 %0 = load i32, ptr @i 42 %inc = add nsw i32 %0, 1 43 store i32 %inc, ptr @i 44 ret void 45} 46 47!llvm.module.flags = !{!0, !1, !2, !3} 48 49!0 = !{i32 8, !"PIC Level", i32 2} 50!1 = !{i32 7, !"PIE Level", i32 2} 51!2 = !{i32 1, !"Large Data Threshold", i64 0} 52 53;--- medium.ll 54!3 = !{i32 1, !"Code Model", i32 3} 55 56;--- large.ll 57!3 = !{i32 1, !"Code Model", i32 4} 58 59;--- ref.ll 60@_GLOBAL_OFFSET_TABLE_ = external global [0 x i8] 61 62define dso_local ptr @ref() { 63entry: 64 ret ptr @_GLOBAL_OFFSET_TABLE_ 65} 66 67;--- b.ll 68target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128" 69target triple = "x86_64-unknown-linux-gnu" 70 71@i = global i32 0 72