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

This reverts commit 748bb5a0f1.

Due to Chromium CFI+ThinLTO test crashes reported on patch.
This commit is contained in:
Teresa Johnson 2020-02-05 19:25:38 -08:00
parent ccf900fc93
commit 25aa2eef99
21 changed files with 43 additions and 101 deletions
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5
llvm/include/llvm/IR/ModuleSummaryIndex.h
View File

@ -833,8 +833,7 @@ 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")
Unknown, ///< Unknown (analysis not performed, don't lower)
} TheKind = Unknown;
} TheKind = Unsat;
/// 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
@ -1027,7 +1026,7 @@ 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 = 9;
static constexpr uint64_t BitcodeSummaryVersion = 8;
// Regular LTO module name for ASM writer
static constexpr const char *getRegularLTOModuleName() {

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

@ -17,7 +17,6 @@ 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

@ -7660,9 +7660,6 @@ 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

@ -2772,8 +2772,6 @@ 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

@ -748,12 +748,6 @@ PassBuilder::buildModuleSimplificationPipeline(OptimizationLevel Level,
true /* SamplePGO */));
}
// 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
@ -1176,9 +1170,6 @@ 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;
}
@ -1245,10 +1236,6 @@ 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;
}
@ -1376,9 +1363,6 @@ 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).

15
llvm/lib/Transforms/IPO/LowerTypeTests.cpp
View File

@ -735,9 +735,6 @@ 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());
@ -1046,10 +1043,8 @@ void LowerTypeTestsModule::importTypeTest(CallInst *CI) {
TypeIdLowering TIL = importTypeId(TypeIdStr->getString());
Value *Lowered = lowerTypeTestCall(TypeIdStr, CI, TIL);
if (Lowered) {
CI->replaceAllUsesWith(Lowered);
CI->eraseFromParent();
}
CI->replaceAllUsesWith(Lowered);
CI->eraseFromParent();
}
// ThinLTO backend: the function F has a jump table entry; update this module
@ -1172,10 +1167,8 @@ void LowerTypeTestsModule::lowerTypeTestCalls(
for (CallInst *CI : TIUI.CallSites) {
++NumTypeTestCallsLowered;
Value *Lowered = lowerTypeTestCall(TypeId, CI, TIL);
if (Lowered) {
CI->replaceAllUsesWith(Lowered);
CI->eraseFromParent();
}
CI->replaceAllUsesWith(Lowered);
CI->eraseFromParent();
}
}
}

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

@ -503,7 +503,6 @@ 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.
@ -537,11 +536,9 @@ 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
@ -1041,8 +1038,8 @@ void PassManagerBuilder::populateThinLTOPassManager(
PM.add(createVerifierPass());
if (ImportSummary) {
// This pass imports type identifier resolutions for whole-program
// devirtualization and CFI. It must run early because other passes may
// These passes import type identifier resolutions for whole-program
// devirtualization and CFI. They 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.
//
@ -1090,9 +1087,6 @@ 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);

54
llvm/lib/Transforms/IPO/WholeProgramDevirt.cpp
View File

@ -510,9 +510,7 @@ struct DevirtModule {
bool areRemarksEnabled();
void
scanTypeTestUsers(Function *TypeTestFunc,
DenseMap<Metadata *, std::set<TypeMemberInfo>> &TypeIdMap);
void scanTypeTestUsers(Function *TypeTestFunc);
void scanTypeCheckedLoadUsers(Function *TypeCheckedLoadFunc);
void buildTypeIdentifierMap(
@ -1668,9 +1666,7 @@ bool DevirtModule::areRemarksEnabled() {
return false;
}
void DevirtModule::scanTypeTestUsers(
Function *TypeTestFunc,
DenseMap<Metadata *, std::set<TypeMemberInfo>> &TypeIdMap) {
void DevirtModule::scanTypeTestUsers(Function *TypeTestFunc) {
// 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,
@ -1690,10 +1686,10 @@ void DevirtModule::scanTypeTestUsers(
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) {
// Only add this CallSite if we haven't seen it before. The vtable
@ -1706,13 +1702,6 @@ void DevirtModule::scanTypeTestUsers(
}
}
// If we have any uses on type metadata, keep the type test assumes for
// later analysis. Otherwise remove as they aren't useful, and
// LowerTypeTests will think they are Unsat and lower to False, which
// breaks any uses on assumes.
if (TypeIdMap.count(TypeId))
continue;
// We no longer need the assumes or the type test.
for (auto Assume : Assumes)
Assume->eraseFromParent();
@ -1911,13 +1900,8 @@ 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, TypeIdMap);
scanTypeTestUsers(TypeTestFunc);
if (TypeCheckedLoadFunc)
scanTypeCheckedLoadUsers(TypeCheckedLoadFunc);
@ -1939,6 +1923,10 @@ 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;
@ -1995,17 +1983,14 @@ bool DevirtModule::run() {
// function implementation at offset S.first.ByteOffset, and add to
// TargetsForSlot.
std::vector<VirtualCallTarget> TargetsForSlot;
WholeProgramDevirtResolution *Res = nullptr;
if (ExportSummary && isa<MDString>(S.first.TypeID))
// 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.
Res = &ExportSummary
->getOrInsertTypeIdSummary(
cast<MDString>(S.first.TypeID)->getString())
.WPDRes[S.first.ByteOffset];
if (tryFindVirtualCallTargets(TargetsForSlot, TypeIdMap[S.first.TypeID],
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 |=
@ -2119,14 +2104,11 @@ 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=9/>
; CHECK: <VERSION op0=8/>

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

@ -92,7 +92,6 @@
; 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

@ -79,7 +79,6 @@
; 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

@ -48,7 +48,6 @@
; 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

@ -59,7 +59,6 @@
; 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

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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: unknown, sizeM1BitWidth: 0), wpdResolutions: ((offset: 0, wpdRes: (kind: singleImpl, singleImplName: "_ZNK1A1fEv"))))) ; guid
; CHECK: typeid: (name: "_ZTS1A", summary: (typeTestRes: (kind: unsat, 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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: Unknown
; SUMMARY-NEXT: Kind: Unsat
; 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 i32 %
; CHECK-NOT: call
; CHECK: ret i32 123
ret i32 %result
}