| ; REQUIRES: x86-registered-target |
| |
| ; Test devirtualization through the thin link and backend. |
| |
| ; Generate split module with summary for hybrid Thin/Regular LTO WPD. |
| ; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t.o %s |
| |
| ; Check that we have module flag showing splitting enabled, and that we don't |
| ; generate summary information needed for index-based WPD. |
| ; RUN: llvm-modextract -b -n=0 %t.o -o %t.o.0 |
| ; RUN: llvm-dis -o - %t.o.0 | FileCheck %s --check-prefix=ENABLESPLITFLAG --implicit-check-not=vTableFuncs --implicit-check-not=typeidCompatibleVTable |
| ; RUN: llvm-modextract -b -n=1 %t.o -o %t.o.1 |
| ; RUN: llvm-dis -o - %t.o.1 | FileCheck %s --check-prefix=ENABLESPLITFLAG --implicit-check-not=vTableFuncs --implicit-check-not=typeidCompatibleVTable |
| ; ENABLESPLITFLAG: !{i32 1, !"EnableSplitLTOUnit", i32 1} |
| |
| ; Generate unsplit module with summary for ThinLTO index-based WPD. |
| ; RUN: opt -thinlto-bc -o %t2.o %s |
| |
| ; Check that we don't have module flag when splitting not enabled for ThinLTO, |
| ; and that we generate summary information needed for index-based WPD. |
| ; RUN: llvm-dis -o - %t2.o | FileCheck %s --check-prefix=NOENABLESPLITFLAG |
| ; NOENABLESPLITFLAG-DAG: !{i32 1, !"EnableSplitLTOUnit", i32 0} |
| ; NOENABLESPLITFLAG-DAG: [[An:\^[0-9]+]] = gv: (name: "_ZN1A1nEi" |
| ; NOENABLESPLITFLAG-DAG: [[Bf:\^[0-9]+]] = gv: (name: "_ZN1B1fEi" |
| ; NOENABLESPLITFLAG-DAG: [[Cf:\^[0-9]+]] = gv: (name: "_ZN1C1fEi" |
| ; NOENABLESPLITFLAG-DAG: [[Dm:\^[0-9]+]] = gv: (name: "_ZN1D1mEi" |
| ; NOENABLESPLITFLAG-DAG: [[B:\^[0-9]+]] = gv: (name: "_ZTV1B", {{.*}} vTableFuncs: ((virtFunc: [[Bf]], offset: 16), (virtFunc: [[An]], offset: 24)), refs: ([[Bf]], [[An]]) |
| ; NOENABLESPLITFLAG-DAG: [[C:\^[0-9]+]] = gv: (name: "_ZTV1C", {{.*}} vTableFuncs: ((virtFunc: [[Cf]], offset: 16), (virtFunc: [[An]], offset: 24)), refs: ([[An]], [[Cf]]) |
| ; NOENABLESPLITFLAG-DAG: [[D:\^[0-9]+]] = gv: (name: "_ZTV1D", {{.*}} vTableFuncs: ((virtFunc: [[Dm]], offset: 16)), refs: ([[Dm]]) |
| ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1A", summary: ((offset: 16, [[B]]), (offset: 16, [[C]]))) |
| ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1B", summary: ((offset: 16, [[B]]))) |
| ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "_ZTS1C", summary: ((offset: 16, [[C]]))) |
| ; Type Id on _ZTV1D should have been promoted |
| ; NOENABLESPLITFLAG-DAG: typeidCompatibleVTable: (name: "1.{{.*}}", summary: ((offset: 16, [[D]]))) |
| |
| ; Index based WPD |
| ; RUN: llvm-lto2 run %t2.o -save-temps -pass-remarks=. \ |
| ; RUN: -whole-program-visibility \ |
| ; RUN: -o %t3 \ |
| ; RUN: -r=%t2.o,test,px \ |
| ; RUN: -r=%t2.o,_ZN1A1nEi,p \ |
| ; RUN: -r=%t2.o,_ZN1B1fEi,p \ |
| ; RUN: -r=%t2.o,_ZN1C1fEi,p \ |
| ; RUN: -r=%t2.o,_ZN1D1mEi,p \ |
| ; RUN: -r=%t2.o,_ZTV1B,px \ |
| ; RUN: -r=%t2.o,_ZTV1C,px \ |
| ; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK |
| ; RUN: llvm-dis %t3.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR |
| |
| ; Check that we're able to prevent specific function from being |
| ; devirtualized when running index based WPD. |
| ; RUN: llvm-lto2 run %t2.o -save-temps -pass-remarks=. \ |
| ; RUN: -whole-program-visibility \ |
| ; RUN: -wholeprogramdevirt-skip=_ZN1A1nEi \ |
| ; RUN: -o %t3 \ |
| ; RUN: -r=%t2.o,test,px \ |
| ; RUN: -r=%t2.o,_ZN1A1nEi,p \ |
| ; RUN: -r=%t2.o,_ZN1B1fEi,p \ |
| ; RUN: -r=%t2.o,_ZN1C1fEi,p \ |
| ; RUN: -r=%t2.o,_ZN1D1mEi,p \ |
| ; RUN: -r=%t2.o,_ZTV1B,px \ |
| ; RUN: -r=%t2.o,_ZTV1C,px \ |
| ; RUN: -r=%t2.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=SKIP |
| |
| ; RUN: llvm-lto2 run %t.o -save-temps -pass-remarks=. \ |
| ; RUN: -whole-program-visibility \ |
| ; RUN: -o %t3 \ |
| ; RUN: -r=%t.o,test,px \ |
| ; RUN: -r=%t.o,_ZN1A1nEi,p \ |
| ; RUN: -r=%t.o,_ZN1B1fEi,p \ |
| ; RUN: -r=%t.o,_ZN1C1fEi,p \ |
| ; RUN: -r=%t.o,_ZN1D1mEi,p \ |
| ; RUN: -r=%t.o,_ZTV1B, \ |
| ; RUN: -r=%t.o,_ZTV1C, \ |
| ; RUN: -r=%t.o,_ZTV1D, \ |
| ; RUN: -r=%t.o,_ZN1A1nEi, \ |
| ; RUN: -r=%t.o,_ZN1B1fEi, \ |
| ; RUN: -r=%t.o,_ZN1C1fEi, \ |
| ; RUN: -r=%t.o,_ZN1D1mEi, \ |
| ; RUN: -r=%t.o,_ZTV1B,px \ |
| ; RUN: -r=%t.o,_ZTV1C,px \ |
| ; RUN: -r=%t.o,_ZTV1D,px 2>&1 | FileCheck %s --check-prefix=REMARK --dump-input=fail |
| ; RUN: llvm-dis %t3.1.4.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 |
| |
| ; SKIP-NOT: devirtualized a call to _ZN1A1nEi |
| |
| 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 = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1B1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !1 |
| @_ZTV1C = constant { [4 x ptr] } { [4 x ptr] [ptr null, ptr undef, ptr @_ZN1C1fEi, ptr @_ZN1A1nEi] }, !type !0, !type !2 |
| @_ZTV1D = constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr undef, ptr @_ZN1D1mEi] }, !type !3 |
| |
| |
| ; CHECK-IR-LABEL: define i32 @test |
| define i32 @test(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 |
| ; Ensure !prof and !callees metadata for indirect call promotion removed. |
| ; CHECK-IR-NOT: prof |
| ; CHECK-IR-NOT: callees |
| %call = tail call i32 %fptr1(ptr nonnull %obj, i32 %a), !prof !5, !callees !6 |
| |
| %fptr22 = load ptr, ptr %vtable, align 8 |
| |
| ; We still have to call it as virtual. |
| ; CHECK-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 |
| %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 = !{!"VP", i32 0, i64 1, i64 1621563287929432257, i64 1} |
| !6 = !{ptr @_ZN1A1nEi} |