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Restore "[WPD/LowerTypeTests] Delay lowering/removal of type tests until after ICP" 

This restores commit 80d0a137a5, and the
follow on fix in 873c0d0786, with a new
fix for test failures after a 2-stage clang bootstrap, and a more robust
fix for the Chromium build failure that an earlier version partially
fixed. See also discussion on D75201.

Reviewers: evgeny777

Subscribers: mehdi_amini, Prazek, hiraditya, steven_wu, dexonsmith, arphaman, davidxl, cfe-commits, llvm-commits

Tags: #clang, #llvm

Differential Revision: https://reviews.llvm.org/D73242
This commit is contained in:
Teresa Johnson 2020-03-17 11:08:35 -07:00
parent 02c3f70b47
commit 6014c46c80
25 changed files with 376 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
llvm/include/llvm/IR/ModuleSummaryIndex.h
View File

@ -894,7 +894,8 @@ struct TypeTestResolution {
Single, ///< Single element (last example in "Short Inline Bit Vectors")
AllOnes, ///< All-ones bit vector ("Eliminating Bit Vector Checks for
/// All-Ones Bit Vectors")
} TheKind = Unsat;
Unknown, ///< Unknown (analysis not performed, don't lower)
} TheKind = Unknown;
/// Range of size-1 expressed as a bit width. For example, if the size is in
/// range [1,256], this number will be 8. This helps generate the most compact
@ -1092,7 +1093,7 @@ public:
// in the way some record are interpreted, like flags for instance.
// Note that incrementing this may require changes in both BitcodeReader.cpp
// and BitcodeWriter.cpp.
static constexpr uint64_t BitcodeSummaryVersion = 8;
static constexpr uint64_t BitcodeSummaryVersion = 9;
// Regular LTO module name for ASM writer
static constexpr const char *getRegularLTOModuleName() {

1
llvm/include/llvm/IR/ModuleSummaryIndexYAML.h
View File

@ -17,6 +17,7 @@ namespace yaml {
template <> struct ScalarEnumerationTraits<TypeTestResolution::Kind> {
static void enumeration(IO &io, TypeTestResolution::Kind &value) {
io.enumCase(value, "Unknown", TypeTestResolution::Unknown);
io.enumCase(value, "Unsat", TypeTestResolution::Unsat);
io.enumCase(value, "ByteArray", TypeTestResolution::ByteArray);
io.enumCase(value, "Inline", TypeTestResolution::Inline);

3
llvm/lib/AsmParser/LLParser.cpp
View File

@ -7799,6 +7799,9 @@ bool LLParser::ParseTypeTestResolution(TypeTestResolution &TTRes) {
return true;
switch (Lex.getKind()) {
case lltok::kw_unknown:
TTRes.TheKind = TypeTestResolution::Unknown;
break;
case lltok::kw_unsat:
TTRes.TheKind = TypeTestResolution::Unsat;
break;

2
llvm/lib/IR/AsmWriter.cpp
View File

@ -2861,6 +2861,8 @@ static const char *getWholeProgDevirtResByArgKindName(
static const char *getTTResKindName(TypeTestResolution::Kind K) {
switch (K) {
case TypeTestResolution::Unknown:
return "unknown";
case TypeTestResolution::Unsat:
return "unsat";
case TypeTestResolution::ByteArray:

16
llvm/lib/Passes/PassBuilder.cpp
View File

@ -971,6 +971,12 @@ ModulePassManager PassBuilder::buildModuleSimplificationPipeline(
if (AttributorRun & AttributorRunOption::MODULE)
MPM.addPass(AttributorPass());
// Lower type metadata and the type.test intrinsic in the ThinLTO
// post link pipeline after ICP. This is to enable usage of the type
// tests in ICP sequences.
if (Phase == ThinLTOPhase::PostLink)
MPM.addPass(LowerTypeTestsPass(nullptr, nullptr, true));
// Interprocedural constant propagation now that basic cleanup has occurred
// and prior to optimizing globals.
// FIXME: This position in the pipeline hasn't been carefully considered in
@ -1355,6 +1361,9 @@ PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level, bool DebugLogging,
// metadata and intrinsics.
MPM.addPass(WholeProgramDevirtPass(ExportSummary, nullptr));
MPM.addPass(LowerTypeTestsPass(ExportSummary, nullptr));
// Run a second time to clean up any type tests left behind by WPD for use
// in ICP.
MPM.addPass(LowerTypeTestsPass(nullptr, nullptr, true));
return MPM;
}
@ -1421,6 +1430,10 @@ PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level, bool DebugLogging,
// The LowerTypeTestsPass needs to run to lower type metadata and the
// type.test intrinsics. The pass does nothing if CFI is disabled.
MPM.addPass(LowerTypeTestsPass(ExportSummary, nullptr));
// Run a second time to clean up any type tests left behind by WPD for use
// in ICP (which is performed earlier than this in the regular LTO
// pipeline).
MPM.addPass(LowerTypeTestsPass(nullptr, nullptr, true));
return MPM;
}
@ -1548,6 +1561,9 @@ PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level, bool DebugLogging,
// to be run at link time if CFI is enabled. This pass does nothing if
// CFI is disabled.
MPM.addPass(LowerTypeTestsPass(ExportSummary, nullptr));
// Run a second time to clean up any type tests left behind by WPD for use
// in ICP (which is performed earlier than this in the regular LTO pipeline).
MPM.addPass(LowerTypeTestsPass(nullptr, nullptr, true));
// Enable splitting late in the FullLTO post-link pipeline. This is done in
// the same stage in the old pass manager (\ref addLateLTOOptimizationPasses).

21
llvm/lib/Transforms/IPO/LowerTypeTests.cpp
View File

@ -735,6 +735,9 @@ static bool isKnownTypeIdMember(Metadata *TypeId, const DataLayout &DL,
/// replace the call with.
Value *LowerTypeTestsModule::lowerTypeTestCall(Metadata *TypeId, CallInst *CI,
const TypeIdLowering &TIL) {
// Delay lowering if the resolution is currently unknown.
if (TIL.TheKind == TypeTestResolution::Unknown)
return nullptr;
if (TIL.TheKind == TypeTestResolution::Unsat)
return ConstantInt::getFalse(M.getContext());
@ -1036,14 +1039,18 @@ void LowerTypeTestsModule::importTypeTest(CallInst *CI) {
report_fatal_error("Second argument of llvm.type.test must be metadata");
auto TypeIdStr = dyn_cast<MDString>(TypeIdMDVal->getMetadata());
// If this is a local unpromoted type, which doesn't have a metadata string,
// treat as Unknown and delay lowering, so that we can still utilize it for
// later optimizations.
if (!TypeIdStr)
report_fatal_error(
"Second argument of llvm.type.test must be a metadata string");
return;
TypeIdLowering TIL = importTypeId(TypeIdStr->getString());
Value *Lowered = lowerTypeTestCall(TypeIdStr, CI, TIL);
CI->replaceAllUsesWith(Lowered);
CI->eraseFromParent();
if (Lowered) {
CI->replaceAllUsesWith(Lowered);
CI->eraseFromParent();
}
}
// ThinLTO backend: the function F has a jump table entry; update this module
@ -1166,8 +1173,10 @@ void LowerTypeTestsModule::lowerTypeTestCalls(
for (CallInst *CI : TIUI.CallSites) {
++NumTypeTestCallsLowered;
Value *Lowered = lowerTypeTestCall(TypeId, CI, TIL);
CI->replaceAllUsesWith(Lowered);
CI->eraseFromParent();
if (Lowered) {
CI->replaceAllUsesWith(Lowered);
CI->eraseFromParent();
}
}
}
}

12
llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
View File

@ -515,6 +515,7 @@ void PassManagerBuilder::populateModulePassManager(
MPM.add(createBarrierNoopPass());
if (PerformThinLTO) {
MPM.add(createLowerTypeTestsPass(nullptr, nullptr, true));
// Drop available_externally and unreferenced globals. This is necessary
// with ThinLTO in order to avoid leaving undefined references to dead
// globals in the object file.
@ -548,9 +549,11 @@ void PassManagerBuilder::populateModulePassManager(
// inter-module indirect calls. For that we perform indirect call promotion
// earlier in the pass pipeline, here before globalopt. Otherwise imported
// available_externally functions look unreferenced and are removed.
if (PerformThinLTO)
if (PerformThinLTO) {
MPM.add(createPGOIndirectCallPromotionLegacyPass(/*InLTO = */ true,
!PGOSampleUse.empty()));
MPM.add(createLowerTypeTestsPass(nullptr, nullptr, true));
}
// For SamplePGO in ThinLTO compile phase, we do not want to unroll loops
// as it will change the CFG too much to make the 2nd profile annotation
@ -1079,8 +1082,8 @@ void PassManagerBuilder::populateThinLTOPassManager(
PM.add(createVerifierPass());
if (ImportSummary) {
// These passes import type identifier resolutions for whole-program
// devirtualization and CFI. They must run early because other passes may
// This pass imports type identifier resolutions for whole-program
// devirtualization and CFI. It must run early because other passes may
// disturb the specific instruction patterns that these passes look for,
// creating dependencies on resolutions that may not appear in the summary.
//
@ -1128,6 +1131,9 @@ void PassManagerBuilder::populateLTOPassManager(legacy::PassManagerBase &PM) {
// control flow integrity mechanisms (-fsanitize=cfi*) and needs to run at
// link time if CFI is enabled. The pass does nothing if CFI is disabled.
PM.add(createLowerTypeTestsPass(ExportSummary, nullptr));
// Run a second time to clean up any type tests left behind by WPD for use
// in ICP (which is performed earlier than this in the regular LTO pipeline).
PM.add(createLowerTypeTestsPass(nullptr, nullptr, true));
if (OptLevel != 0)
addLateLTOOptimizationPasses(PM);

105
llvm/lib/Transforms/IPO/WholeProgramDevirt.cpp
View File

@ -540,7 +540,9 @@ struct DevirtModule {
bool areRemarksEnabled();
void scanTypeTestUsers(Function *TypeTestFunc);
void
scanTypeTestUsers(Function *TypeTestFunc,
DenseMap<Metadata *, std::set<TypeMemberInfo>> &TypeIdMap);
void scanTypeCheckedLoadUsers(Function *TypeCheckedLoadFunc);
void buildTypeIdentifierMap(
@ -1705,7 +1707,9 @@ bool DevirtModule::areRemarksEnabled() {
return false;
}
void DevirtModule::scanTypeTestUsers(Function *TypeTestFunc) {
void DevirtModule::scanTypeTestUsers(
Function *TypeTestFunc,
DenseMap<Metadata *, std::set<TypeMemberInfo>> &TypeIdMap) {
// Find all virtual calls via a virtual table pointer %p under an assumption
// of the form llvm.assume(llvm.type.test(%p, %md)). This indicates that %p
// points to a member of the type identifier %md. Group calls by (type ID,
@ -1724,22 +1728,59 @@ void DevirtModule::scanTypeTestUsers(Function *TypeTestFunc) {
auto &DT = LookupDomTree(*CI->getFunction());
findDevirtualizableCallsForTypeTest(DevirtCalls, Assumes, CI, DT);
Metadata *TypeId =
cast<MetadataAsValue>(CI->getArgOperand(1))->getMetadata();
// If we found any, add them to CallSlots.
if (!Assumes.empty()) {
Metadata *TypeId =
cast<MetadataAsValue>(CI->getArgOperand(1))->getMetadata();
Value *Ptr = CI->getArgOperand(0)->stripPointerCasts();
for (DevirtCallSite Call : DevirtCalls)
CallSlots[{TypeId, Call.Offset}].addCallSite(Ptr, Call.CB, nullptr);
}
// We no longer need the assumes or the type test.
for (auto Assume : Assumes)
Assume->eraseFromParent();
// We can't use RecursivelyDeleteTriviallyDeadInstructions here because we
// may use the vtable argument later.
if (CI->use_empty())
CI->eraseFromParent();
auto RemoveTypeTestAssumes = [&]() {
// We no longer need the assumes or the type test.
for (auto Assume : Assumes)
Assume->eraseFromParent();
// We can't use RecursivelyDeleteTriviallyDeadInstructions here because we
// may use the vtable argument later.
if (CI->use_empty())
CI->eraseFromParent();
};
// At this point we could remove all type test assume sequences, as they
// were originally inserted for WPD. However, we can keep these in the
// code stream for later analysis (e.g. to help drive more efficient ICP
// sequences). They will eventually be removed by a second LowerTypeTests
// invocation that cleans them up. In order to do this correctly, the first
// LowerTypeTests invocation needs to know that they have "Unknown" type
// test resolution, so that they aren't treated as Unsat and lowered to
// False, which will break any uses on assumes. Below we remove any type
// test assumes that will not be treated as Unknown by LTT.
// The type test assumes will be treated by LTT as Unsat if the type id is
// not used on a global (in which case it has no entry in the TypeIdMap).
if (!TypeIdMap.count(TypeId))
RemoveTypeTestAssumes();
// For ThinLTO importing, we need to remove the type test assumes if this is
// an MDString type id without a corresponding TypeIdSummary. Any
// non-MDString type ids are ignored and treated as Unknown by LTT, so their
// type test assumes can be kept. If the MDString type id is missing a
// TypeIdSummary (e.g. because there was no use on a vcall, preventing the
// exporting phase of WPD from analyzing it), then it would be treated as
// Unsat by LTT and we need to remove its type test assumes here. If not
// used on a vcall we don't need them for later optimization use in any
// case.
else if (ImportSummary && isa<MDString>(TypeId)) {
const TypeIdSummary *TidSummary =
ImportSummary->getTypeIdSummary(cast<MDString>(TypeId)->getString());
if (!TidSummary)
RemoveTypeTestAssumes();
else
// If one was created it should not be Unsat, because if we reached here
// the type id was used on a global.
assert(TidSummary->TTRes.TheKind != TypeTestResolution::Unsat);
}
}
}
@ -1931,8 +1972,13 @@ bool DevirtModule::run() {
(!TypeCheckedLoadFunc || TypeCheckedLoadFunc->use_empty()))
return false;
// Rebuild type metadata into a map for easy lookup.
std::vector<VTableBits> Bits;
DenseMap<Metadata *, std::set<TypeMemberInfo>> TypeIdMap;
buildTypeIdentifierMap(Bits, TypeIdMap);
if (TypeTestFunc && AssumeFunc)
scanTypeTestUsers(TypeTestFunc);
scanTypeTestUsers(TypeTestFunc, TypeIdMap);
if (TypeCheckedLoadFunc)
scanTypeCheckedLoadUsers(TypeCheckedLoadFunc);
@ -1954,10 +2000,6 @@ bool DevirtModule::run() {
return true;
}
// Rebuild type metadata into a map for easy lookup.
std::vector<VTableBits> Bits;
DenseMap<Metadata *, std::set<TypeMemberInfo>> TypeIdMap;
buildTypeIdentifierMap(Bits, TypeIdMap);
if (TypeIdMap.empty())
return true;
@ -2014,14 +2056,22 @@ bool DevirtModule::run() {
// function implementation at offset S.first.ByteOffset, and add to
// TargetsForSlot.
std::vector<VirtualCallTarget> TargetsForSlot;
if (tryFindVirtualCallTargets(TargetsForSlot, TypeIdMap[S.first.TypeID],
WholeProgramDevirtResolution *Res = nullptr;
const std::set<TypeMemberInfo> &TypeMemberInfos = TypeIdMap[S.first.TypeID];
if (ExportSummary && isa<MDString>(S.first.TypeID) &&
TypeMemberInfos.size())
// For any type id used on a global's type metadata, create the type id
// summary resolution regardless of whether we can devirtualize, so that
// lower type tests knows the type id is not Unsat. If it was not used on
// a global's type metadata, the TypeIdMap entry set will be empty, and
// we don't want to create an entry (with the default Unknown type
// resolution), which can prevent detection of the Unsat.
Res = &ExportSummary
->getOrInsertTypeIdSummary(
cast<MDString>(S.first.TypeID)->getString())
.WPDRes[S.first.ByteOffset];
if (tryFindVirtualCallTargets(TargetsForSlot, TypeMemberInfos,
S.first.ByteOffset)) {
WholeProgramDevirtResolution *Res = nullptr;
if (ExportSummary && isa<MDString>(S.first.TypeID))
Res = &ExportSummary
->getOrInsertTypeIdSummary(
cast<MDString>(S.first.TypeID)->getString())
.WPDRes[S.first.ByteOffset];
if (!trySingleImplDevirt(ExportSummary, TargetsForSlot, S.second, Res)) {
DidVirtualConstProp |=
@ -2135,11 +2185,14 @@ void DevirtIndex::run() {
std::vector<ValueInfo> TargetsForSlot;
auto TidSummary = ExportSummary.getTypeIdCompatibleVtableSummary(S.first.TypeID);
assert(TidSummary);
// Create the type id summary resolution regardlness of whether we can
// devirtualize, so that lower type tests knows the type id is used on
// a global and not Unsat.
WholeProgramDevirtResolution *Res =
&ExportSummary.getOrInsertTypeIdSummary(S.first.TypeID)
.WPDRes[S.first.ByteOffset];
if (tryFindVirtualCallTargets(TargetsForSlot, *TidSummary,
S.first.ByteOffset)) {
WholeProgramDevirtResolution *Res =
&ExportSummary.getOrInsertTypeIdSummary(S.first.TypeID)
.WPDRes[S.first.ByteOffset];
if (!trySingleImplDevirt(TargetsForSlot, S.first, S.second, Res,
DevirtTargets))

2
llvm/test/Bitcode/summary_version.ll
View File

@ -2,7 +2,7 @@
; RUN: opt -module-summary %s -o - | llvm-bcanalyzer -dump | FileCheck %s
; CHECK: <GLOBALVAL_SUMMARY_BLOCK
; CHECK: <VERSION op0=8/>
; CHECK: <VERSION op0=9/>

1
llvm/test/Other/new-pm-lto-defaults.ll
View File

@ -99,6 +99,7 @@
; CHECK-O2-NEXT: Running analysis: DemandedBitsAnalysis
; CHECK-O2-NEXT: Running pass: CrossDSOCFIPass
; CHECK-O2-NEXT: Running pass: LowerTypeTestsPass
; CHECK-O-NEXT: Running pass: LowerTypeTestsPass
; CHECK-O2-NEXT: Running pass: ModuleToFunctionPassAdaptor<{{.*}}SimplifyCFGPass>
; CHECK-O2-NEXT: Running pass: EliminateAvailableExternallyPass
; CHECK-O2-NEXT: Running pass: GlobalDCEPass

1
llvm/test/Other/new-pm-thinlto-defaults.ll
View File

@ -79,6 +79,7 @@
; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O3-NEXT: Running pass: CallSiteSplittingPass
; CHECK-O-NEXT: Finished llvm::Function pass manager run.
; CHECK-POSTLINK-O-NEXT: Running pass: LowerTypeTestsPass
; CHECK-O-NEXT: Running pass: IPSCCPPass
; CHECK-O-NEXT: Running pass: CalledValuePropagationPass
; CHECK-O-NEXT: Running pass: GlobalOptPass

1
llvm/test/Other/new-pm-thinlto-postlink-pgo-defaults.ll
View File

@ -48,6 +48,7 @@
; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O3-NEXT: Running pass: CallSiteSplittingPass
; CHECK-O-NEXT: Finished {{.*}}Function pass manager run.
; CHECK-O-NEXT: Running pass: LowerTypeTestsPass
; CHECK-O-NEXT: Running pass: IPSCCPPass
; CHECK-O-NEXT: Running pass: CalledValuePropagationPass
; CHECK-O-NEXT: Running pass: GlobalOptPass

1
llvm/test/Other/new-pm-thinlto-postlink-samplepgo-defaults.ll
View File

@ -59,6 +59,7 @@
; CHECK-O-NEXT: Running analysis: CallGraphAnalysis
; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}ProfileSummaryAnalysis
; CHECK-O-NEXT: Running pass: PGOIndirectCallPromotion
; CHECK-O-NEXT: Running pass: LowerTypeTestsPass
; CHECK-O-NEXT: Running pass: IPSCCPPass
; CHECK-O-NEXT: Running pass: CalledValuePropagationPass
; CHECK-O-NEXT: Running pass: GlobalOptPass

68
llvm/test/ThinLTO/X86/Inputs/cfi-unsat.ll Normal file
View File

@ -0,0 +1,68 @@
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 { i32 (...)** }
%struct.B = type { i32 (...)** }
@_ZTV1B = linkonce_odr constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.B*, i32)* @_ZN1B1fEi to i8*), i8* bitcast (i32 (%struct.B*, i32)* @_ZN1B1nEi to i8*)] }, !type !0
$test = comdat any
$testb = comdat any
define linkonce_odr i32 @test(%struct.A* %obj, i32 %a) comdat {
entry:
%0 = bitcast %struct.A* %obj to i8**
%vtable5 = load i8*, i8** %0
%1 = tail call { i8*, i1 } @llvm.type.checked.load(i8* %vtable5, i32 8, metadata !"_ZTS1A")
%2 = extractvalue { i8*, i1 } %1, 1
br i1 %2, label %cont, label %trap
trap:
tail call void @llvm.trap()
unreachable
cont:
%3 = extractvalue { i8*, i1 } %1, 0
%4 = bitcast i8* %3 to i32 (%struct.A*, i32)*
%call = tail call i32 %4(%struct.A* nonnull %obj, i32 %a)
ret i32 %call
}
define linkonce_odr i32 @testb(%struct.A* %obj, i32 %a) comdat {
entry:
%0 = bitcast %struct.A* %obj to i8**
%vtable5 = load i8*, i8** %0
%1 = tail call { i8*, i1 } @llvm.type.checked.load(i8* %vtable5, i32 0, metadata !"_ZTS1A")
%2 = extractvalue { i8*, i1 } %1, 1
br i1 %2, label %cont, label %trap
trap:
tail call void @llvm.trap()
unreachable
cont:
%3 = extractvalue { i8*, i1 } %1, 0
%4 = bitcast i8* %3 to i32 (%struct.A*, i32)*
%call = tail call i32 %4(%struct.A* nonnull %obj, i32 %a)
ret i32 %call
}
declare { i8*, i1 } @llvm.type.checked.load(i8*, i32, metadata)
declare void @llvm.trap()
define internal i32 @_ZN1B1fEi(%struct.B* %this, i32 %a) {
entry:
ret i32 0
}
define internal i32 @_ZN1B1nEi(%struct.B* %this, i32 %a) {
entry:
ret i32 0
}
!0 = !{i64 16, !"_ZTS1B"}

82
llvm/test/ThinLTO/X86/cfi-unsat.ll Normal file
View File

@ -0,0 +1,82 @@
; 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 -use-new-pm -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 { i32 (...)** }
$test2 = comdat any
define linkonce_odr i32 @test2(%struct.A* %obj, i32 %a) comdat {
entry:
%0 = bitcast %struct.A* %obj to i8**
%vtable5 = load i8*, i8** %0
%1 = tail call { i8*, i1 } @llvm.type.checked.load(i8* %vtable5, i32 8, metadata !"_ZTS1A")
%2 = extractvalue { i8*, i1 } %1, 1
br i1 %2, label %cont, label %trap
trap:
tail call void @llvm.trap()
unreachable
cont:
%3 = extractvalue { i8*, i1 } %1, 0
%4 = bitcast i8* %3 to i32 (%struct.A*, i32)*
%call = tail call i32 %4(%struct.A* nonnull %obj, i32 %a)
ret i32 %call
}
; CHECK-IR0: define weak_odr i32 @test
; CHECK-IR0-NEXT: entry:
; CHECK-IR0-NEXT: %0 = bitcast
; 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: %0 = bitcast
; 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 { i8*, i1 } @llvm.type.checked.load(i8*, i32, metadata)
declare void @llvm.trap()

19
llvm/test/ThinLTO/X86/nodevirt-nonpromoted-typeid.ll
View File

@ -33,6 +33,8 @@
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"
@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @g, i8* null }]
%struct.D = type { i32 (...)** }
@_ZTV1D = internal constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.D*, i32)* @_ZN1D1mEi to i8*)] }, !type !3
@ -57,6 +59,23 @@ entry:
; CHECK-IR-LABEL: ret i32
; CHECK-IR-LABEL: }
; Function Attrs: inlinehint nounwind uwtable
define internal void @_ZN1DC2Ev(%struct.D* %this) unnamed_addr align 2 {
entry:
%this.addr = alloca %struct.D*, align 8
store %struct.D* %this, %struct.D** %this.addr, align 8
%this1 = load %struct.D*, %struct.D** %this.addr
%0 = bitcast %struct.D* %this1 to i32 (...)***
store i32 (...)** bitcast (i8** getelementptr inbounds ({ [3 x i8*] }, { [3 x i8*] }* @_ZTV1D, i64 0, inrange i32 0, i64 2) to i32 (...)**), i32 (...)*** %0, align 8
ret void
}
define internal void @g() section ".text.startup" {
%d = alloca %struct.D, align 8
call void @_ZN1DC2Ev(%struct.D* %d)
ret void
}
declare i1 @llvm.type.test(i8*, metadata)
declare void @llvm.assume(i1)

59
llvm/test/ThinLTO/X86/type_test_noindircall.ll Normal file
View File

@ -0,0 +1,59 @@
; Test to ensure that we correctly handle a type test not used for a virtual call.
; If it isn't removed correctly by WPD then we could incorrectly get an Unsat
; (resulting in an unreachable in the IR).
; REQUIRES: x86-registered-target
; RUN: opt -thinlto-bc -o %t.o %s
; FIXME: Fix machine verifier issues and remove -verify-machineinstrs=0. PR39436.
; RUN: llvm-lto2 run %t.o -save-temps -pass-remarks=. \
; RUN: -whole-program-visibility \
; RUN: -verify-machineinstrs=0 \
; RUN: -r=%t.o,_ZTVN12_GLOBAL__N_18RealFileE,px \
; RUN: -o %t2
; RUN: llvm-dis %t2.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
; Try again without LTO unit splitting.
; RUN: opt -thinlto-bc -thinlto-split-lto-unit=false -o %t3.o %s
; RUN: llvm-lto2 run %t.o -save-temps -pass-remarks=. \
; RUN: -whole-program-visibility \
; RUN: -verify-machineinstrs=0 \
; RUN: -r=%t.o,_ZTVN12_GLOBAL__N_18RealFileE,px \
; RUN: -o %t4
; RUN: llvm-dis %t4.1.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-IR
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"
%"class.llvm::vfs::File" = type { i32 (...)** }
%"class.llvm::vfs::Status" = type <{ %"class.std::__cxx11::basic_string", %"class.llvm::sys::fs::UniqueID", %"struct.std::chrono::time_point", i32, i32, i64, i32, i32, i8, [7 x i8] }>
%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider" = type { i8* }
%union.anon = type { i64, [8 x i8] }
%"class.llvm::sys::fs::UniqueID" = type { i64, i64 }
%"struct.std::chrono::time_point" = type { %"struct.std::chrono::duration" }
%"struct.std::chrono::duration" = type { i64 }
%"class.(anonymous namespace)::RealFile" = type { %"class.llvm::vfs::File", i32, [4 x i8], %"class.llvm::vfs::Status", %"class.std::__cxx11::basic_string" }
@_ZTVN12_GLOBAL__N_18RealFileE = unnamed_addr constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* null, i8* bitcast (void (%"class.(anonymous namespace)::RealFile"*)* @_ZN12_GLOBAL__N_18RealFileD2Ev to i8*)] }, align 8, !type !74
define internal void @_ZN12_GLOBAL__N_18RealFileD2Ev(%"class.(anonymous namespace)::RealFile"* %this) unnamed_addr #0 align 2 {
entry:
; CHECK-IR: %0 = getelementptr
%0 = getelementptr %"class.(anonymous namespace)::RealFile", %"class.(anonymous namespace)::RealFile"* %this, i64 0, i32 0, i32 0
; CHECK-IR-NEXT: store
store i32 (...)** bitcast (i8** getelementptr inbounds ({ [3 x i8*] }, { [3 x i8*] }* @_ZTVN12_GLOBAL__N_18RealFileE, i64 0, inrange i32 0, i64 2) to i32 (...)**), i32 (...)*** %0, align 8
%1 = tail call i1 @llvm.type.test(i8* bitcast (i8** getelementptr inbounds ({ [3 x i8*] }, { [3 x i8*] }* @_ZTVN12_GLOBAL__N_18RealFileE, i64 0, inrange i32 0, i64 2) to i8*), metadata !"4$09c6cc733fc6accb91e5d7b87cb48f2d")
tail call void @llvm.assume(i1 %1)
; CHECK-IR-NEXT: ret void
ret void
}
declare i1 @llvm.type.test(i8*, metadata)
declare void @llvm.assume(i1)
; Make sure we don't inline or otherwise optimize out the direct calls.
attributes #0 = { noinline optnone }
!74 = !{i64 16, !"4$09c6cc733fc6accb91e5d7b87cb48f2d"}

6
llvm/test/Transforms/WholeProgramDevirt/branch-funnel.ll
View File

@ -10,7 +10,7 @@
; SUMMARY: TypeIdMap:
; SUMMARY-NEXT: typeid3:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0
@ -23,7 +23,7 @@
; SUMMARY-NEXT: ResByArg:
; SUMMARY-NEXT: typeid1:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0
@ -36,7 +36,7 @@
; SUMMARY-NEXT: ResByArg:
; SUMMARY-NEXT: typeid2:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0

2
llvm/test/Transforms/WholeProgramDevirt/devirt-single-impl2.ll
View File

@ -14,7 +14,7 @@
; RUN: -wholeprogramdevirt-summary-action=export -o /dev/null 2>&1 | FileCheck %s --check-prefix=MISSING-MODULE
; Check single impl devirtulation in summary
; CHECK: typeid: (name: "_ZTS1A", summary: (typeTestRes: (kind: unsat, sizeM1BitWidth: 0), wpdResolutions: ((offset: 0, wpdRes: (kind: singleImpl, singleImplName: "_ZNK1A1fEv"))))) ; guid
; CHECK: typeid: (name: "_ZTS1A", summary: (typeTestRes: (kind: unknown, sizeM1BitWidth: 0), wpdResolutions: ((offset: 0, wpdRes: (kind: singleImpl, singleImplName: "_ZNK1A1fEv"))))) ; guid
; MISSING-MODULE: combined summary should contain Regular LTO module

8
llvm/test/Transforms/WholeProgramDevirt/export-single-impl.ll
View File

@ -4,7 +4,7 @@
; SUMMARY: TypeIdMap:
; SUMMARY-NEXT: typeid3:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0
@ -17,7 +17,7 @@
; SUMMARY-NEXT: ResByArg:
; SUMMARY-NEXT: typeid1:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0
@ -30,7 +30,7 @@
; SUMMARY-NEXT: ResByArg:
; SUMMARY-NEXT: typeid2:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0
@ -43,7 +43,7 @@
; SUMMARY-NEXT: ResByArg:
; SUMMARY-NEXT: typeid4:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0

2
llvm/test/Transforms/WholeProgramDevirt/export-uniform-ret-val.ll
View File

@ -6,7 +6,7 @@
; SUMMARY: TypeIdMap:
; SUMMARY-NEXT: typeid4:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0

4
llvm/test/Transforms/WholeProgramDevirt/export-unique-ret-val.ll
View File

@ -6,7 +6,7 @@
; SUMMARY: TypeIdMap:
; SUMMARY-NEXT: typeid3:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0
@ -24,7 +24,7 @@
; SUMMARY-NEXT: Bit: 0
; SUMMARY-NEXT: typeid4:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0

4
llvm/test/Transforms/WholeProgramDevirt/export-vcp.ll
View File

@ -9,7 +9,7 @@ target datalayout = "e-p:64:64"
; SUMMARY: TypeIdMap:
; SUMMARY-NEXT: typeid3:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0
@ -29,7 +29,7 @@ target datalayout = "e-p:64:64"
; SUMMARY-ARM-NEXT: Bit: 1
; SUMMARY-NEXT: typeid4:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0

2
llvm/test/Transforms/WholeProgramDevirt/import-indir.ll
View File

@ -32,7 +32,7 @@
; SUMMARY-NEXT: TypeIdMap:
; SUMMARY-NEXT: typeid1:
; SUMMARY-NEXT: TTRes:
; SUMMARY-NEXT: Kind: Unsat
; SUMMARY-NEXT: Kind: Unknown
; SUMMARY-NEXT: SizeM1BitWidth: 0
; SUMMARY-NEXT: AlignLog2: 0
; SUMMARY-NEXT: SizeM1: 0

2
llvm/test/Transforms/WholeProgramDevirt/uniform-retval.ll
View File

@ -25,7 +25,7 @@ define i32 @call(i8* %obj) {
%fptr = load i8*, i8** %fptrptr
%fptr_casted = bitcast i8* %fptr to i32 (i8*)*
%result = call i32 %fptr_casted(i8* %obj)
; CHECK-NOT: call
; CHECK-NOT: call i32 %
; CHECK: ret i32 123
ret i32 %result
}