| ; REQUIRES: x86-registered-target |
| |
| ; Test that index-based devirtualization in the presence of same-named |
| ; local vtables in same named source files fails. |
| |
| ; Generate unsplit module with summary for ThinLTO index-based WPD. |
| ; RUN: opt -thinlto-bc -o %t3.o %s |
| ; RUN: opt -thinlto-bc -o %t4.o %p/Inputs/devirt_local_same_guid.ll |
| |
| ; RUN: llvm-lto2 run %t3.o %t4.o -save-temps -pass-remarks=. \ |
| ; RUN: -wholeprogramdevirt-print-index-based \ |
| ; RUN: -o %t5 \ |
| ; RUN: -r=%t3.o,use_B,px \ |
| ; RUN: -r=%t3.o,test,px \ |
| ; RUN: -r=%t4.o,test2,px |
| ; RUN: llvm-dis %t5.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR1 |
| ; RUN: llvm-dis %t5.2.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR2 |
| |
| 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" |
| |
| source_filename = "-" |
| |
| %struct.A = type { ptr } |
| %struct.B = type { %struct.A } |
| |
| @_ZTV1B = internal constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1B1fEi, ptr @_ZN1B1nEi] }, !type !0, !type !1 |
| |
| define internal i32 @_ZN1B1fEi(ptr %this, i32 %a) #0 { |
| ret i32 0; |
| } |
| |
| define internal i32 @_ZN1B1nEi(ptr %this, i32 %a) #0 { |
| ret i32 0; |
| } |
| |
| ; Ensures that vtable of B is live so that we will attempt devirt. |
| define dso_local i32 @use_B(ptr %a) { |
| entry: |
| store ptr getelementptr inbounds ({ [4 x ptr] }, ptr @_ZTV1B, i64 0, inrange i32 0, i64 2), ptr %a, align 8 |
| ret i32 0 |
| } |
| |
| ; CHECK-IR1: define i32 @test( |
| define i32 @test(ptr %obj, 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 not devirtualized. |
| ; CHECK-IR1: %call = tail call i32 %fptr1 |
| %call = tail call i32 %fptr1(ptr nonnull %obj, i32 %a) |
| |
| ret i32 %call |
| } |
| |
| ; CHECK-IR2: define i32 @test2 |
| ; Check that the call was not devirtualized. |
| ; CHECK-IR2: %call4 = tail call i32 %fptr |
| |
| declare i1 @llvm.type.test(ptr, metadata) |
| declare void @llvm.assume(i1) |
| |
| attributes #0 = { noinline optnone } |
| |
| !0 = !{i64 16, !"_ZTS1A"} |
| !1 = !{i64 16, !"_ZTS1B"} |