derek.holloway
7502bf64a4
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50 lines
2.2 KiB
LLVM
50 lines
2.2 KiB
LLVM
; RUN: opt < %s -passes=globaldce -S | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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declare { ptr, i1 } @llvm.type.checked.load(ptr, i32, metadata)
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@vtable = internal unnamed_addr constant { [3 x i32] } { [3 x i32] [
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i32 trunc (i64 sub (i64 ptrtoint (ptr @vfunc1 to i64), i64 ptrtoint (ptr @vtable to i64)) to i32),
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i32 trunc (i64 sub (i64 ptrtoint (ptr @vfunc2 to i64), i64 ptrtoint (ptr @vtable to i64)) to i32),
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; a "bad" relative pointer because it's base is not the @vtable symbol
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i32 trunc (i64 sub (i64 ptrtoint (ptr @weird_ref_1 to i64), i64 ptrtoint (ptr @weird_ref_2 to i64)) to i32)
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]}, align 8, !type !0, !type !1, !vcall_visibility !{i64 2}
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!0 = !{i64 0, !"vfunc1.type"}
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!1 = !{i64 4, !"vfunc2.type"}
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; CHECK: @vtable = internal unnamed_addr constant { [3 x i32] } zeroinitializer, align 8, !type !0, !type !1, !vcall_visibility !2
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@vtable2 = internal unnamed_addr constant { [3 x i32] } { [3 x i32] [
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i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vfunc3 to i64), i64 ptrtoint (ptr @vtable2 to i64)) to i32),
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i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vfunc4 to i64), i64 ptrtoint (ptr @vtable2 to i64)) to i32),
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; a "bad" relative pointer because it's base is not the @vtable symbol
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i32 trunc (i64 sub (i64 ptrtoint (ptr @weird_ref_3 to i64), i64 ptrtoint (ptr @weird_ref_4 to i64)) to i32)
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]}, align 4, !type !3, !type !4, !vcall_visibility !{i64 2}
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!3 = !{i64 0, !"vfunc3.type"}
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!4 = !{i64 4, !"vfunc4.type"}
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; CHECK: @vtable2 = internal unnamed_addr constant { [3 x i32] } zeroinitializer, align 4, !type !3, !type !4, !vcall_visibility !2
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define internal void @vfunc1() { ret void }
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define internal void @vfunc2() { ret void }
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define internal void @weird_ref_1() { ret void }
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define internal void @weird_ref_2() { ret void }
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declare void @vfunc3()
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declare void @vfunc4()
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declare void @weird_ref_3()
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declare void @weird_ref_4()
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define void @main() {
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%1 = ptrtoint ptr @vtable to i64 ; to keep @vtable alive
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call void @weird_ref_2()
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%2 = ptrtoint ptr @vtable2 to i64 ; to keep @vtable2 alive
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call void @weird_ref_4()
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ret void
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}
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!999 = !{i32 1, !"Virtual Function Elim", i32 1}
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!llvm.module.flags = !{!999}
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