| ; REQUIRES: x86 |
| ;; Test that dynamically exported symbols prevent devirtualization. |
| |
| ;; First check that we get devirtualization without any export dynamic options. |
| |
| ;; Index based WPD |
| ;; Generate unsplit module with summary for ThinLTO index-based WPD. |
| ; RUN: opt --thinlto-bc -o %t2.o %s |
| ; RUN: ld.lld %t2.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. 2>&1 | FileCheck %s --check-prefix=REMARK |
| ; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR |
| |
| ;; Hybrid WPD |
| ;; Generate split module with summary for hybrid Thin/Regular LTO WPD. |
| ; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o %t.o %s |
| ; RUN: ld.lld %t.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. 2>&1 | FileCheck %s --check-prefix=REMARK |
| ; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR |
| |
| ;; Regular LTO WPD |
| ; RUN: opt -o %t4.o %s |
| ; RUN: ld.lld %t4.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. 2>&1 | FileCheck %s --check-prefix=REMARK |
| ; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR |
| |
| ; REMARK-DAG: single-impl: devirtualized a call to _ZN1A1nEi |
| ; REMARK-DAG: single-impl: devirtualized a call to _ZN1D1mEi |
| |
| ;; Check that all WPD fails with --export-dynamic. |
| |
| ;; Index based WPD |
| ; RUN: ld.lld %t2.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. \ |
| ; RUN: --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty |
| ; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR |
| |
| ;; Hybrid WPD |
| ; RUN: ld.lld %t.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. \ |
| ; RUN: --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty |
| ; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR |
| |
| ;; Regular LTO WPD |
| ; RUN: ld.lld %t4.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. \ |
| ; RUN: --export-dynamic 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty |
| ; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR |
| |
| ;; Check that WPD fails for target _ZN1D1mEi with --export-dynamic-symbol=_ZTV1D. |
| |
| ;; Index based WPD |
| ; RUN: ld.lld %t2.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. \ |
| ; RUN: --export-dynamic-symbol=_ZTV1D 2>&1 | FileCheck %s --check-prefix=REMARK-AONLY |
| ; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-AONLY-IR |
| |
| ;; Hybrid WPD |
| ; RUN: ld.lld %t.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. \ |
| ; RUN: --export-dynamic-symbol=_ZTV1D 2>&1 | FileCheck %s --check-prefix=REMARK-AONLY |
| ; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-AONLY-IR |
| |
| ;; Regular LTO WPD |
| ; RUN: ld.lld %t4.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. \ |
| ; RUN: --export-dynamic-symbol=_ZTV1D 2>&1 | FileCheck %s --check-prefix=REMARK-AONLY |
| ; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-AONLY-IR |
| |
| ; REMARK-AONLY-NOT: single-impl: |
| ; REMARK-AONLY: single-impl: devirtualized a call to _ZN1A1nEi |
| ; REMARK-AONLY-NOT: single-impl: |
| |
| ;; Check that WPD fails for target _ZN1D1mEi with _ZTV1D in --dynamic-list. |
| ; RUN: echo "{ _ZTV1D; };" > %t.list |
| |
| ;; Index based WPD |
| ; RUN: ld.lld %t2.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. \ |
| ; RUN: --dynamic-list=%t.list 2>&1 | FileCheck %s --check-prefix=REMARK-AONLY |
| ; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-AONLY-IR |
| |
| ;; Hybrid WPD |
| ; RUN: ld.lld %t.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. \ |
| ; RUN: --dynamic-list=%t.list 2>&1 | FileCheck %s --check-prefix=REMARK-AONLY |
| ; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-AONLY-IR |
| |
| ;; Regular LTO WPD |
| ; RUN: ld.lld %t4.o -o %t3 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. \ |
| ; RUN: --dynamic-list=%t.list 2>&1 | FileCheck %s --check-prefix=REMARK-AONLY |
| ; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-AONLY-IR |
| |
| |
| ;; Check that all WPD fails with when linking against a shared library containing |
| ;; preemptible versions of the vtables. In this case the symbols in the object being |
| ;; linked against the shared library must be exported to .dynsym to allow the runtime |
| ;; preemption, even without any options. |
| |
| ;; Index based WPD |
| ; RUN: opt -relocation-model=pic --thinlto-bc -o %t5.o %s |
| ; RUN: ld.lld %t5.o -o %t5.so -shared |
| ; RUN: ld.lld %t5.o %t5.so -o %t5 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty |
| |
| ;; Hybrid WPD |
| ; RUN: opt -relocation-model=pic --thinlto-bc --thinlto-split-lto-unit -o %t5.o %s |
| ; RUN: ld.lld %t5.o -o %t5.so -shared |
| ; RUN: ld.lld %t5.o %t5.so -o %t5 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty |
| |
| ;; Regular LTO WPD |
| ; RUN: opt -relocation-model=pic -o %t5.o %s |
| ; RUN: ld.lld %t5.o -o %t5.so -shared |
| ; RUN: ld.lld %t5.o %t5.so -o %t5 -save-temps --lto-whole-program-visibility \ |
| ; RUN: -mllvm -pass-remarks=. 2>&1 | FileCheck /dev/null --implicit-check-not single-impl --allow-empty |
| |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-grtev4-linux-gnu" |
| |
| %struct.A = type { ptr } |
| %struct.B = type { %struct.A } |
| %struct.C = type { %struct.A } |
| %struct.D = type { ptr } |
| |
| @_ZTV1B = linkonce_odr unnamed_addr constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1B1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !1, !vcall_visibility !5 |
| @_ZTV1C = linkonce_odr unnamed_addr constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1C1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !2, !vcall_visibility !5 |
| @_ZTV1D = linkonce_odr unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr undef, ptr @_ZN1D1mEi] }, !type !3, !vcall_visibility !5 |
| |
| ;; Prevent the vtables from being dead code eliminated. |
| @llvm.used = appending global [3 x ptr] [ ptr @_ZTV1B, ptr @_ZTV1C, ptr @_ZTV1D] |
| |
| ; CHECK-IR-LABEL: define dso_local {{(noundef )?}}i32 @_start |
| define i32 @_start(ptr %obj, ptr %obj2, i32 %a) { |
| entry: |
| %vtable = load ptr, ptr %obj |
| %p = call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS1A") |
| call void @llvm.assume(i1 %p) |
| %fptrptr = getelementptr ptr, ptr %vtable, i32 1 |
| %fptr1 = load ptr, ptr %fptrptr, align 8 |
| |
| ;; Check that the call was devirtualized. |
| ; CHECK-IR: %call = tail call i32 @_ZN1A1nEi |
| ; CHECK-AONLY-IR: %call = tail call i32 @_ZN1A1nEi |
| ; CHECK-NODEVIRT-IR: %call = tail call i32 %fptr1 |
| %call = tail call i32 %fptr1(ptr nonnull %obj, i32 %a) |
| |
| %fptr22 = load ptr, ptr %vtable, align 8 |
| |
| ;; We still have to call it as virtual. |
| ; CHECK-IR: %call3 = tail call i32 %fptr22 |
| ; CHECK-AONLY-IR: %call3 = tail call i32 %fptr22 |
| ; CHECK-NODEVIRT-IR: %call3 = tail call i32 %fptr22 |
| %call3 = tail call i32 %fptr22(ptr nonnull %obj, i32 %call) |
| |
| %vtable2 = load ptr, ptr %obj2 |
| %p2 = call i1 @llvm.type.test(ptr %vtable2, metadata !4) |
| call void @llvm.assume(i1 %p2) |
| |
| %fptr33 = load ptr, ptr %vtable2, align 8 |
| |
| ;; Check that the call was devirtualized. |
| ; CHECK-IR: %call4 = tail call i32 @_ZN1D1mEi |
| ; CHECK-AONLY-IR: %call4 = tail call i32 %fptr33 |
| ; CHECK-NODEVIRT-IR: %call4 = tail call i32 %fptr33 |
| %call4 = tail call i32 %fptr33(ptr nonnull %obj2, i32 %call3) |
| ret i32 %call4 |
| } |
| ; CHECK-IR-LABEL: ret i32 |
| ; CHECK-IR-LABEL: } |
| |
| declare i1 @llvm.type.test(ptr, metadata) |
| declare void @llvm.assume(i1) |
| |
| define i32 @_ZN1B1fEi(ptr %this, i32 %a) #0 { |
| ret i32 0; |
| } |
| |
| define i32 @_ZN1A1nEi(ptr %this, i32 %a) #0 { |
| ret i32 0; |
| } |
| |
| define i32 @_ZN1C1fEi(ptr %this, i32 %a) #0 { |
| ret i32 0; |
| } |
| |
| define i32 @_ZN1D1mEi(ptr %this, i32 %a) #0 { |
| ret i32 0; |
| } |
| |
| ;; Make sure we don't inline or otherwise optimize out the direct calls. |
| attributes #0 = { noinline optnone } |
| |
| !0 = !{i64 16, !"_ZTS1A"} |
| !1 = !{i64 16, !"_ZTS1B"} |
| !2 = !{i64 16, !"_ZTS1C"} |
| !3 = !{i64 16, !4} |
| !4 = distinct !{} |
| !5 = !{i64 0} |