200cc952a2
D63932 added a module flag to indicate that we are executing the regular LTO post merge pipeline, so that GlobalDCE could perform more aggressive optimization for Dead Virtual Function Elimination. This caused issues trying to reuse bitcode that had already been through the LTO pipeline (see context in D139816). Instead support this by passing down a parameter flag to the GlobalDCEPass constructor, which is the more usual way for indicating this information. Most test changes are to remove incidental uses of this flag. Of the 2 real uses, llvm/test/LTO/ARM/lto-linking-metadata.ll is now obsolete and removed in this patch, and the virtual-functions-visibility-post-lto.ll test is updated to use the regular LTO default pipeline where this parameter is set to true. Differential Revision: https://reviews.llvm.org/D153655
46 lines
1.6 KiB
LLVM
46 lines
1.6 KiB
LLVM
; RUN: opt < %s -passes=globaldce -S | FileCheck %s
|
|
|
|
; We currently only use llvm.type.checked.load for virtual function pointers,
|
|
; not any other part of the vtable, so we can't remove the RTTI pointer even if
|
|
; it's never going to be loaded from.
|
|
|
|
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
|
|
|
|
%struct.A = type { ptr }
|
|
|
|
; CHECK: @_ZTV1A = hidden unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI1A, ptr null] }, align 8, !type !0, !type !1, !vcall_visibility !2
|
|
|
|
@_ZTV1A = hidden unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI1A, ptr @_ZN1A3fooEv] }, align 8, !type !0, !type !1, !vcall_visibility !2
|
|
@_ZTS1A = hidden constant [3 x i8] c"1A\00", align 1
|
|
@_ZTI1A = hidden constant { ptr, ptr } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv117__class_type_infoE, i64 2), ptr @_ZTS1A }, align 8
|
|
|
|
define internal void @_ZN1AC2Ev(ptr %this) {
|
|
entry:
|
|
store ptr getelementptr inbounds ({ [3 x ptr] }, ptr @_ZTV1A, i64 0, inrange i32 0, i64 2), ptr %this, align 8
|
|
ret void
|
|
}
|
|
|
|
; CHECK-NOT: define {{.*}} @_ZN1A3fooEv(
|
|
define internal void @_ZN1A3fooEv(ptr nocapture %this) {
|
|
entry:
|
|
ret void
|
|
}
|
|
|
|
define dso_local ptr @_Z6make_Av() {
|
|
entry:
|
|
%call = tail call ptr @_Znwm(i64 8)
|
|
tail call void @_ZN1AC2Ev(ptr %call)
|
|
ret ptr %call
|
|
}
|
|
|
|
|
|
declare dso_local noalias nonnull ptr @_Znwm(i64)
|
|
@_ZTVN10__cxxabiv117__class_type_infoE = external dso_local global ptr
|
|
|
|
!llvm.module.flags = !{!4}
|
|
|
|
!0 = !{i64 16, !"_ZTS1A"}
|
|
!1 = !{i64 16, !"_ZTSM1AFvvE.virtual"}
|
|
!2 = !{i64 2} ; translation-unit vcall visibility
|
|
!4 = !{i32 1, !"Virtual Function Elim", i32 1}
|