derek.holloway
7502bf64a4
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72 lines
2.2 KiB
LLVM
72 lines
2.2 KiB
LLVM
; REQUIRES: x86
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;; LTO-generated relocatable files may reference _GLOBAL_OFFSET_TABLE_ while
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;; the IR does not mention _GLOBAL_OFFSET_TABLE_.
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;; Test that there is no spurious "undefined symbol" error.
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; RUN: rm -rf %t && split-file %s %t && cd %t
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; RUN: opt -module-summary b.ll -o b.bc
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;; Test Thin LTO.
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; RUN: cat a.ll medium.ll | opt -module-summary - -o medium.bc
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; RUN: ld.lld -pie --no-relax medium.bc b.bc -o medium
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; RUN: llvm-objdump -dt medium | FileCheck %s
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;; Test regular LTO.
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; RUN: cat a.ll large.ll | llvm-as - -o large.bc
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; RUN: ld.lld -pie large.bc b.bc -o large
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; RUN: llvm-objdump -dt large | FileCheck %s
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;; Explicit reference of _GLOBAL_OFFSET_TABLE_ is fine.
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; RUN: cat a.ll medium.ll ref.ll | opt -module-summary - -o ref.bc
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; RUN: ld.lld -pie -u ref ref.bc b.bc -y _GLOBAL_OFFSET_TABLE_ -o ref 2>&1 | FileCheck %s --check-prefix=TRACE
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; RUN: llvm-objdump -dt ref | FileCheck %s
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; TRACE: ref.bc: reference to _GLOBAL_OFFSET_TABLE_
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; TRACE-NEXT: ref.bc: reference to _GLOBAL_OFFSET_TABLE_
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; TRACE-NEXT: <internal>: definition of _GLOBAL_OFFSET_TABLE_
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; TRACE-NEXT: ref.lto.ref.o: reference to _GLOBAL_OFFSET_TABLE_
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;; The IR symbol table references _GLOBAL_OFFSET_TABLE_, which causes lld to define the symbol.
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; CHECK: .got.plt 0000000000000000 .hidden _GLOBAL_OFFSET_TABLE_
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; CHECK: movabsq
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;--- a.ll
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@i = external global i32
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define dso_local void @_start() {
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entry:
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%0 = load i32, ptr @i
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%inc = add nsw i32 %0, 1
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store i32 %inc, ptr @i
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ret void
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}
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!llvm.module.flags = !{!0, !1, !2, !3}
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!0 = !{i32 8, !"PIC Level", i32 2}
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!1 = !{i32 7, !"PIE Level", i32 2}
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!2 = !{i32 1, !"Large Data Threshold", i64 0}
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;--- medium.ll
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!3 = !{i32 1, !"Code Model", i32 3}
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;--- large.ll
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!3 = !{i32 1, !"Code Model", i32 4}
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;--- ref.ll
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@_GLOBAL_OFFSET_TABLE_ = external global [0 x i8]
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define dso_local ptr @ref() {
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entry:
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ret ptr @_GLOBAL_OFFSET_TABLE_
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}
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;--- b.ll
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@i = global i32 0
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