7117dea043
https://reviews.llvm.org/D17938 introduced lowerRelativeReference to give ConstantExpr sub (A-B) special semantics in ELF: when `A` is an `unnamed_addr` function, create a PLT-generating relocation. This was intended for C++ relative vtables, but C++ relative vtable ended up using DSOLocalEquivalent (lowerDSOLocalEquivalent). This special treatment of `unnamed_addr` seems unusual. Let's remove it. Only COFF needs an overload to generate a @IMGREL32 relocation specifier (llvm/test/MC/COFF/cross-section-relative.ll). Pull Request: https://github.com/llvm/llvm-project/pull/134781
46 lines
1.6 KiB
LLVM
46 lines
1.6 KiB
LLVM
; RUN: llc -relocation-model=pic -data-sections -o - %s | FileCheck %s
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target triple = "x86_64-unknown-linux-gnu"
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@hidden = external hidden global i8
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@default = external global i8
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; CHECK: .section .rodata.rodata
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; CHECK: rodata:
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; CHECK: .long hidden-rodata
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@rodata = hidden constant i32 trunc (i64 sub (i64 ptrtoint (ptr @hidden to i64), i64 ptrtoint (ptr @rodata to i64)) to i32)
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; CHECK: .section .data.rel.ro.relro1
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; CHECK: relro1:
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; CHECK: .long default-relro1
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@relro1 = hidden constant i32 trunc (i64 sub (i64 ptrtoint (ptr @default to i64), i64 ptrtoint (ptr @relro1 to i64)) to i32)
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; CHECK: .section .data.rel.ro.relro2
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; CHECK: relro2:
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; CHECK: .long hidden-relro2
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@relro2 = constant i32 trunc (i64 sub (i64 ptrtoint (ptr @hidden to i64), i64 ptrtoint (ptr @relro2 to i64)) to i32)
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; CHECK: .section .rodata.obj
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; CHECK-NEXT: .globl obj
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; CHECK: obj:
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; CHECK: .long 0
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; CHECK: .long hidden_func@PLT-obj-4
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declare hidden void @hidden_func()
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; Ensure that inbound GEPs with constant offsets are also resolved.
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@obj = dso_local unnamed_addr constant { { i32, i32 } } {
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{ i32, i32 } {
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i32 0,
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i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @hidden_func to i64), i64 ptrtoint (ptr getelementptr inbounds ({ { i32, i32 } }, ptr @obj, i32 0, i32 0, i32 1) to i64)) to i32)
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} }, align 4
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; CHECK: .section .rodata.rodata2
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; CHECK-NEXT: .globl rodata2
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; CHECK: rodata2:
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; CHECK: .long extern_func@PLT-rodata2
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declare void @extern_func()
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@rodata2 = dso_local constant i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @extern_func to i64), i64 ptrtoint (ptr @rodata2 to i64)) to i32)
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