| ; REQUIRES: x86-registered-target |
| |
| ; Test CFI devirtualization through the thin link and backend when |
| ; a type id is Unsat (not used on any global's type metadata). |
| ; |
| ; In this test case, the first module is split and will import a resolution |
| ; for its type test. The resolution would be exported by the second |
| ; module, which is set up so that it does not get split (treated as regular |
| ; LTO because it does not have any external globals from which to create |
| ; a unique module ID). We should not actually get any resolution for the |
| ; type id in this case, since no globals include it in their type metadata, |
| ; so the resolution is Unsat and the type.checked.load instructions are |
| ; converted to type tests that evaluate to false. |
| |
| ; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t.o %s |
| ; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t1.o %p/Inputs/cfi-unsat.ll |
| |
| ; RUN: llvm-lto2 run %t.o %t1.o -save-temps -pass-remarks=. \ |
| ; RUN: -whole-program-visibility \ |
| ; RUN: -o %t3 \ |
| ; RUN: -r=%t.o,test2,px \ |
| ; RUN: -r=%t1.o,_ZTV1B,px \ |
| ; RUN: -r=%t1.o,test,px \ |
| ; RUN: -r=%t1.o,testb,px |
| ; RUN: llvm-dis %t3.index.bc -o - | FileCheck %s --check-prefix=INDEX |
| ; RUN: llvm-dis %t3.0.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR0 |
| ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR1 |
| |
| ; INDEX-NOT: "typeid:" |
| |
| 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 } |
| |
| $test2 = comdat any |
| |
| define linkonce_odr i32 @test2(ptr %obj, i32 %a) comdat { |
| entry: |
| %vtable5 = load ptr, ptr %obj |
| |
| %0 = tail call { ptr, i1 } @llvm.type.checked.load(ptr %vtable5, i32 8, metadata !"_ZTS1A") |
| %1 = extractvalue { ptr, i1 } %0, 1 |
| br i1 %1, label %cont, label %trap |
| |
| trap: |
| tail call void @llvm.trap() |
| unreachable |
| |
| cont: |
| %2 = extractvalue { ptr, i1 } %0, 0 |
| |
| %call = tail call i32 %2(ptr nonnull %obj, i32 %a) |
| |
| ret i32 %call |
| } |
| |
| ; CHECK-IR0: define weak_odr i32 @test |
| ; CHECK-IR0-NEXT: entry: |
| ; CHECK-IR0-NEXT: %vtable5 = |
| ; CHECK-IR0-NEXT: tail call void @llvm.trap() |
| ; CHECK-IR0-NEXT: unreachable |
| ; CHECK-IR0-NEXT: } |
| ; CHECK-IR0: define weak_odr i32 @testb |
| ; CHECK-IR0-NEXT: entry: |
| ; CHECK-IR0-NEXT: %vtable5 = |
| ; CHECK-IR0-NEXT: tail call void @llvm.trap() |
| ; CHECK-IR0-NEXT: unreachable |
| ; CHECK-IR0-NEXT: } |
| |
| ; CHECK-IR1: define weak_odr i32 @test2 |
| ; CHECK-IR1-NEXT: entry: |
| ; CHECK-IR1-NEXT: tail call void @llvm.trap() |
| ; CHECK-IR1-NEXT: unreachable |
| ; CHECK-IR1-NEXT: } |
| |
| declare { ptr, i1 } @llvm.type.checked.load(ptr, i32, metadata) |
| declare void @llvm.trap() |