8ebb3eac02
The legacy PM is deprecated, so update a bunch of lit tests running opt to use the new PM syntax when specifying the pipeline. In this patch focus has been put on test cases for ConstantMerge, ConstraintElimination, CorrelatedValuePropagation, GlobalDCE, GlobalOpt, SCCP, TailCallElim and PredicateInfo. Differential Revision: https://reviews.llvm.org/D114516
40 lines
1.7 KiB
LLVM
40 lines
1.7 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 { i8*, i1 } @llvm.type.checked.load(i8*, i32, metadata)
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; A vtable with "relative pointers", slots don't contain pointers to implementations, but instead have an i32 offset from the vtable itself to the implementation.
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@vtable = internal unnamed_addr constant { [2 x i32] } { [2 x i32] [
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i32 trunc (i64 sub (i64 ptrtoint (void ()* @vfunc1_live to i64), i64 ptrtoint ({ [2 x i32] }* @vtable to i64)) to i32),
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i32 trunc (i64 sub (i64 ptrtoint (void ()* @vfunc2_dead to i64), i64 ptrtoint ({ [2 x i32] }* @vtable 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 { [2 x i32] } { [2 x i32] [
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; CHECK-SAME: i32 trunc (i64 sub (i64 ptrtoint (void ()* @vfunc1_live to i64), i64 ptrtoint ({ [2 x i32] }* @vtable to i64)) to i32),
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; CHECK-SAME: i32 0
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; CHECK-SAME: ] }, align 8, !type !0, !type !1, !vcall_visibility !2
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; (1) vfunc1_live is referenced from @main, stays alive
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define internal void @vfunc1_live() {
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; CHECK: define internal void @vfunc1_live(
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ret void
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}
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; (2) vfunc2_dead is never referenced, gets removed and vtable slot is null'd
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define internal void @vfunc2_dead() {
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; CHECK-NOT: define internal void @vfunc2_dead(
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ret void
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}
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define void @main() {
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%1 = ptrtoint { [2 x i32] }* @vtable to i64 ; to keep @vtable alive
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%2 = tail call { i8*, i1 } @llvm.type.checked.load(i8* null, i32 0, metadata !"vfunc1.type")
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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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