9c2eb220ed
Summary: Second patch in series to support Safe Whole Program Devirtualization Enablement, see RFC here: http://lists.llvm.org/pipermail/llvm-dev/2019-December/137543.html Summarize vcall_visibility metadata in ThinLTO global variable summary. Depends on D71907. Reviewers: pcc, evgeny777, steven_wu Subscribers: mehdi_amini, Prazek, inglorion, hiraditya, dexonsmith, arphaman, ostannard, llvm-commits, cfe-commits, davidxl Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D71911
102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
// RUN: %clang_cc1 -flto -flto-unit -triple x86_64-unknown-linux -emit-llvm -fvirtual-function-elimination -fwhole-program-vtables -o - %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-VFE
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// RUN: %clang_cc1 -flto -flto-unit -triple x86_64-unknown-linux -emit-llvm -fwhole-program-vtables -o - %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NOVFE
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// Check that in ThinLTO we also get vcall_visibility summary entries in the bitcode
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// RUN: %clang_cc1 -flto=thin -flto-unit -triple x86_64-unknown-linux -emit-llvm-bc -fwhole-program-vtables -o - %s | llvm-dis -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NOVFE --check-prefix=CHECK-SUMMARY
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// Anonymous namespace.
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namespace {
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// CHECK: @_ZTVN12_GLOBAL__N_11AE = {{.*}} !vcall_visibility [[VIS_TU:![0-9]+]]
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struct A {
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A() {}
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virtual int f() { return 1; }
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};
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}
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void *construct_A() {
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return new A();
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}
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// Hidden visibility.
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// CHECK: @_ZTV1B = {{.*}} !vcall_visibility [[VIS_DSO:![0-9]+]]
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struct __attribute__((visibility("hidden"))) B {
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B() {}
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virtual int f() { return 1; }
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};
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B *construct_B() {
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return new B();
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}
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// Default visibility.
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// CHECK-NOT: @_ZTV1C = {{.*}} !vcall_visibility
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struct __attribute__((visibility("default"))) C {
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C() {}
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virtual int f() { return 1; }
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};
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C *construct_C() {
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return new C();
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}
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// Hidden visibility, public LTO visibility.
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// CHECK-NOT: @_ZTV1D = {{.*}} !vcall_visibility
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struct __attribute__((visibility("hidden"))) [[clang::lto_visibility_public]] D {
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D() {}
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virtual int f() { return 1; }
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};
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D *construct_D() {
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return new D();
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}
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// Hidden visibility, but inherits from class with default visibility.
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// CHECK-NOT: @_ZTV1E = {{.*}} !vcall_visibility
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struct __attribute__((visibility("hidden"))) E : C {
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E() {}
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virtual int f() { return 1; }
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};
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E *construct_E() {
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return new E();
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}
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// Anonymous namespace, but inherits from class with default visibility.
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// CHECK-NOT: @_ZTVN12_GLOBAL__N_11FE = {{.*}} !vcall_visibility
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namespace {
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struct __attribute__((visibility("hidden"))) F : C {
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F() {}
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virtual int f() { return 1; }
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};
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}
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void *construct_F() {
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return new F();
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}
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// Anonymous namespace, but inherits from class with hidden visibility.
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// CHECK: @_ZTVN12_GLOBAL__N_11GE = {{.*}} !vcall_visibility [[VIS_DSO:![0-9]+]]
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namespace {
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struct __attribute__((visibility("hidden"))) G : B {
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G() {}
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virtual int f() { return 1; }
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};
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}
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void *construct_G() {
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return new G();
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}
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// CHECK-DAG: [[VIS_DSO]] = !{i64 1}
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// CHECK-DAG: [[VIS_TU]] = !{i64 2}
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// CHECK-VFE-DAG: !{i32 1, !"Virtual Function Elim", i32 1}
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// CHECK-NOVFE-DAG: !{i32 1, !"Virtual Function Elim", i32 0}
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// CHECK-SUMMARY-DAG: gv: (name: "_ZTV1B", {{.*}} vcall_visibility: 1
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// CHECK-SUMMARY-DAG: gv: (name: "_ZTVN12_GLOBAL__N_11FE", {{.*}} vcall_visibility: 0
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// CHECK-SUMMARY-DAG: gv: (name: "_ZTV1D", {{.*}} vcall_visibility: 0
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// CHECK-SUMMARY-DAG: gv: (name: "_ZTV1C", {{.*}} vcall_visibility: 0
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// CHECK-SUMMARY-DAG: gv: (name: "_ZTV1E", {{.*}} vcall_visibility: 0
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// CHECK-SUMMARY-DAG: gv: (name: "_ZTVN12_GLOBAL__N_11AE", {{.*}} vcall_visibility: 2
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// CHECK-SUMMARY-DAG: gv: (name: "_ZTVN12_GLOBAL__N_11GE", {{.*}} vcall_visibility: 1
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