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[ThinLTO] Ignore unreachable virtual functions in WPD in thin LTO.
Differential Revision: https://reviews.llvm.org/D115648
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llvm/test/ThinLTO/X86/devirt_after_filtering_unreachable.ll
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| ; Test that unreachable functions are ignored by WPD in hybrid LTO, and thin LTO. | ||
| ; In this test case, the unreachable function is the virtual deleting destructor of an abstract class. | ||
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| ; Generate split module with summary for hybrid Regular LTO WPD | ||
| ; RUN: opt -thinlto-bc -thinlto-split-lto-unit %s -o %t-main.bc | ||
| ; RUN: opt -thinlto-bc -thinlto-split-lto-unit %p/Inputs/devirt_after_filtering_unreachable_lib.ll -o %t-foo.bc | ||
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| ; Check that deleting destructor of pure virtual class is unreachable. | ||
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| ; Check that deleting destructor of pure virtual class is unreachable. | ||
| ; RUN: llvm-modextract -b -n=0 %t-foo.bc -o %t-foo.bc.0 | ||
| ; RUN: llvm-dis -o - %t-foo.bc.0 | FileCheck %s --check-prefix=UNREACHABLEFLAG | ||
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| ; Tests that devirtualization happens. | ||
| ; RUN: llvm-lto2 run -save-temps %t-main.bc %t-foo.bc -pass-remarks=. -o %t \ | ||
| ; RUN: -whole-program-visibility \ | ||
| ; RUN: -r=%t-foo.bc,_ZN7Derived1xEv,pl \ | ||
| ; RUN: -r=%t-foo.bc,puts, \ | ||
| ; RUN: -r=%t-foo.bc,_Z3fooP4Base,pl \ | ||
| ; RUN: -r=%t-foo.bc,_ZN7DerivedD2Ev,pl \ | ||
| ; RUN: -r=%t-foo.bc,_ZN7DerivedD0Ev,pl \ | ||
| ; RUN: -r=%t-foo.bc,_ZN4BaseD2Ev,pl \ | ||
| ; RUN: -r=%t-foo.bc,_ZN4BaseD0Ev,pl \ | ||
| ; RUN: -r=%t-foo.bc,__cxa_pure_virtual, \ | ||
| ; RUN: -r=%t-foo.bc,_ZdlPv, \ | ||
| ; RUN: -r=%t-foo.bc,_ZTV7Derived,l \ | ||
| ; RUN: -r=%t-foo.bc,_ZTVN10__cxxabiv120__si_class_type_infoE, \ | ||
| ; RUN: -r=%t-foo.bc,_ZTS7Derived,pl \ | ||
| ; RUN: -r=%t-foo.bc,_ZTVN10__cxxabiv117__class_type_infoE, \ | ||
| ; RUN: -r=%t-foo.bc,_ZTS4Base,pl \ | ||
| ; RUN: -r=%t-foo.bc,_ZTI4Base,pl \ | ||
| ; RUN: -r=%t-foo.bc,_ZTI7Derived,pl \ | ||
| ; RUN: -r=%t-foo.bc,_ZTV4Base,l \ | ||
| ; RUN: -r=%t-foo.bc,__cxa_pure_virtual, \ | ||
| ; RUN: -r=%t-foo.bc,_ZN7Derived1xEv, \ | ||
| ; RUN: -r=%t-foo.bc,_ZN7DerivedD2Ev, \ | ||
| ; RUN: -r=%t-foo.bc,_ZN7DerivedD0Ev, \ | ||
| ; RUN: -r=%t-foo.bc,_ZN4BaseD2Ev, \ | ||
| ; RUN: -r=%t-foo.bc,_ZN4BaseD0Ev, \ | ||
| ; RUN: -r=%t-foo.bc,_ZTV7Derived,pl \ | ||
| ; RUN: -r=%t-foo.bc,_ZTI4Base, \ | ||
| ; RUN: -r=%t-foo.bc,_ZTI7Derived, \ | ||
| ; RUN: -r=%t-foo.bc,_ZTV4Base,pl \ | ||
| ; RUN: -r=%t-main.bc,main,plx \ | ||
| ; RUN: -r=%t-main.bc,_Znwm,pl \ | ||
| ; RUN: -r=%t-main.bc,_Z3fooP4Base, \ | ||
| ; RUN: -r=%t-main.bc,_ZTV7Derived, 2>&1 | FileCheck %s --check-prefix=REMARK | ||
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| ; REMARK-COUNT-1: single-impl: devirtualized a call to _ZN7DerivedD0Ev | ||
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| ; Generate unsplit module with summary for ThinLTO index-based WPD. | ||
| ; RUN: opt -thinlto-bc -o %t3.o %s | ||
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| ; Check that deleting destructor of pure virtual class is unreachable. | ||
| ; RUN: opt -thinlto-bc -o %t4.o %p/Inputs/devirt_after_filtering_unreachable_lib.ll | ||
| ; RUN: llvm-dis -o - %t4.o | FileCheck %s --check-prefix=UNREACHABLEFLAG | ||
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| ; UNREACHABLEFLAG: gv: (name: "_ZN4BaseD0Ev", {{.*}}, funcFlags: ({{.*}} mustBeUnreachable: 1 | ||
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| ; Test that devirtualized happen in index based WPD | ||
| ; RUN: llvm-lto2 run %t4.o %t3.o -save-temps -pass-remarks=. \ | ||
| ; RUN: -whole-program-visibility \ | ||
| ; RUN: -wholeprogramdevirt-print-index-based \ | ||
| ; RUN: -o %t5 \ | ||
| ; RUN: -r=%t4.o,_ZN7Derived1xEv,pl \ | ||
| ; RUN: -r=%t4.o,puts, \ | ||
| ; RUN: -r=%t4.o,_Z3fooP4Base,pl \ | ||
| ; RUN: -r=%t4.o,_ZN7DerivedD2Ev,pl \ | ||
| ; RUN: -r=%t4.o,_ZN7DerivedD0Ev,pl \ | ||
| ; RUN: -r=%t4.o,_ZN4BaseD2Ev,pl \ | ||
| ; RUN: -r=%t4.o,_ZN4BaseD0Ev,pl \ | ||
| ; RUN: -r=%t4.o,__cxa_pure_virtual, \ | ||
| ; RUN: -r=%t4.o,_ZdlPv, \ | ||
| ; RUN: -r=%t4.o,_ZTV7Derived,pl \ | ||
| ; RUN: -r=%t4.o,_ZTVN10__cxxabiv120__si_class_type_infoE, \ | ||
| ; RUN: -r=%t4.o,_ZTS7Derived,pl \ | ||
| ; RUN: -r=%t4.o,_ZTVN10__cxxabiv117__class_type_infoE, \ | ||
| ; RUN: -r=%t4.o,_ZTS4Base,pl \ | ||
| ; RUN: -r=%t4.o,_ZTI4Base,pl \ | ||
| ; RUN: -r=%t4.o,_ZTI7Derived,pl \ | ||
| ; RUN: -r=%t4.o,_ZTV4Base,pl \ | ||
| ; RUN: -r=%t3.o,main,plx \ | ||
| ; RUN: -r=%t3.o,_Znwm, \ | ||
| ; RUN: -r=%t3.o,_Z3fooP4Base, \ | ||
| ; RUN: -r=%t3.o,_ZTV7Derived, 2>&1 | FileCheck %s --check-prefix=THINREMARK | ||
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| ; THINREMARK: Devirtualized call to {{.*}} (_ZN7DerivedD0Ev) | ||
| ; THINREMARK: single-impl: devirtualized a call to _ZN7DerivedD0Ev | ||
| ; THINREMARK: single-impl: devirtualized a call to _ZN7DerivedD0Ev | ||
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| ; ModuleID = 'tmp.cc' | ||
| source_filename = "tmp.cc" | ||
| 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-unknown-linux-gnu" | ||
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| %class.Derived = type { %class.Base } | ||
| %class.Base = type { i32 (...)** } | ||
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| @_ZTV7Derived = external dso_local unnamed_addr constant { [5 x i8*] }, align 8 | ||
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| define hidden i32 @main() local_unnamed_addr { | ||
| entry: | ||
| %call = tail call noalias nonnull dereferenceable(8) i8* @_Znwm(i64 8) | ||
| %0 = bitcast i8* %call to %class.Derived* | ||
| %1 = getelementptr inbounds %class.Derived, %class.Derived* %0, i64 0, i32 0, i32 0 | ||
| store i32 (...)** bitcast (i8** getelementptr inbounds ({ [5 x i8*] }, { [5 x i8*] }* @_ZTV7Derived, i64 0, inrange i32 0, i64 2) to i32 (...)**), i32 (...)*** %1, align 8, !tbaa !4 | ||
| %2 = getelementptr %class.Derived, %class.Derived* %0, i64 0, i32 0 | ||
| tail call void @_Z3fooP4Base(%class.Base* nonnull %2) | ||
| ret i32 0 | ||
| } | ||
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| declare dso_local nonnull i8* @_Znwm(i64) local_unnamed_addr | ||
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| declare dso_local void @_Z3fooP4Base(%class.Base*) local_unnamed_addr | ||
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| !llvm.module.flags = !{!0, !1, !2} | ||
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| !0 = !{i32 1, !"wchar_size", i32 4} | ||
| !1 = !{i32 1, !"Virtual Function Elim", i32 0} | ||
| !2 = !{i32 7, !"uwtable", i32 1} | ||
| !4 = !{!5, !5, i64 0} | ||
| !5 = !{!"vtable pointer", !6, i64 0} | ||
| !6 = !{!"Simple C++ TBAA"} |
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