[llvm-branch-commits] [clang][CallGraphSection] Add type id metadata to indirect call and targets (PR #117036)
via llvm-branch-commits
llvm-branch-commits at lists.llvm.org
Wed Nov 20 11:53:30 PST 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang
Author: Prabhuk (Prabhuk)
<details>
<summary>Changes</summary>
Create and add generalized type identifier metadata to indirect calls,
and to functions that may be target to indirect calls.
Original RFC: https://lists.llvm.org/pipermail/llvm-dev/2021-June/151044.html
Updated RFC: https://lists.llvm.org/pipermail/llvm-dev/2021-July/151739.html
---
Patch is 21.21 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/117036.diff
9 Files Affected:
- (modified) clang/lib/CodeGen/CGCall.cpp (+38)
- (modified) clang/lib/CodeGen/CGExpr.cpp (+6)
- (modified) clang/lib/CodeGen/CGObjCMac.cpp (+2-3)
- (modified) clang/lib/CodeGen/CodeGenModule.cpp (+30-5)
- (modified) clang/lib/CodeGen/CodeGenModule.h (+4)
- (added) clang/test/CodeGen/call-graph-section-1.cpp (+110)
- (added) clang/test/CodeGen/call-graph-section-2.cpp (+95)
- (added) clang/test/CodeGen/call-graph-section-3.cpp (+52)
- (added) clang/test/CodeGen/call-graph-section.c (+85)
``````````diff
diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
index 35d495d4dfab82..d5240db0fceb8f 100644
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -25,6 +25,7 @@
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
+#include "clang/AST/Type.h"
#include "clang/Basic/CodeGenOptions.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/CodeGen/CGFunctionInfo.h"
@@ -5077,6 +5078,11 @@ static unsigned getMaxVectorWidth(const llvm::Type *Ty) {
return MaxVectorWidth;
}
+static bool isCXXDeclType(const FunctionDecl *FD) {
+ return isa<CXXConstructorDecl>(FD) || isa<CXXMethodDecl>(FD) ||
+ isa<CXXDestructorDecl>(FD);
+}
+
RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
const CGCallee &Callee,
ReturnValueSlot ReturnValue,
@@ -5765,6 +5771,38 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
AllocAlignAttrEmitter AllocAlignAttrEmitter(*this, TargetDecl, CallArgs);
Attrs = AllocAlignAttrEmitter.TryEmitAsCallSiteAttribute(Attrs);
+ if (CGM.getCodeGenOpts().CallGraphSection) {
+ // Create operand bundle only for indirect calls, not for all
+ if (callOrInvoke && *callOrInvoke && (*callOrInvoke)->isIndirectCall()) {
+
+ assert((TargetDecl && TargetDecl->getFunctionType() ||
+ Callee.getAbstractInfo().getCalleeFunctionProtoType()) &&
+ "cannot find callsite type");
+
+ QualType CST;
+ if (TargetDecl && TargetDecl->getFunctionType())
+ CST = QualType(TargetDecl->getFunctionType(), 0);
+ else if (const auto *FPT =
+ Callee.getAbstractInfo().getCalleeFunctionProtoType())
+ CST = QualType(FPT, 0);
+
+ if (!CST.isNull()) {
+ auto *TypeIdMD = CGM.CreateMetadataIdentifierGeneralized(CST);
+ auto *TypeIdMDVal =
+ llvm::MetadataAsValue::get(getLLVMContext(), TypeIdMD);
+ BundleList.emplace_back("type", TypeIdMDVal);
+ }
+
+ // Set type identifier metadata of indirect calls for call graph section.
+ if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(TargetDecl)) {
+ // Type id metadata is set only for C/C++ contexts.
+ if (isCXXDeclType(FD)) {
+ CGM.CreateFunctionTypeMetadataForIcall(FD->getType(), *callOrInvoke);
+ }
+ }
+ }
+ }
+
// Emit the actual call/invoke instruction.
llvm::CallBase *CI;
if (!InvokeDest) {
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 232cac22d1bfca..97f2cfe35ec59a 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -6173,6 +6173,12 @@ RValue CodeGenFunction::EmitCall(QualType CalleeType,
if (CallOrInvoke)
*CallOrInvoke = LocalCallOrInvoke;
+ // Set type identifier metadata of indirect calls for call graph section.
+ if (CGM.getCodeGenOpts().CallGraphSection && LocalCallOrInvoke &&
+ LocalCallOrInvoke->isIndirectCall())
+ CGM.CreateFunctionTypeMetadataForIcall(QualType(FnType, 0),
+ LocalCallOrInvoke);
+
return Call;
}
diff --git a/clang/lib/CodeGen/CGObjCMac.cpp b/clang/lib/CodeGen/CGObjCMac.cpp
index 7b85dcc2c7984f..248fb2ef68c43a 100644
--- a/clang/lib/CodeGen/CGObjCMac.cpp
+++ b/clang/lib/CodeGen/CGObjCMac.cpp
@@ -2214,9 +2214,8 @@ CGObjCCommonMac::EmitMessageSend(CodeGen::CodeGenFunction &CGF,
llvm::CallBase *CallSite;
CGCallee Callee = CGCallee::forDirect(BitcastFn);
- RValue rvalue = CGF.EmitCall(MSI.CallInfo, Callee, Return, ActualArgs,
- &CallSite);
-
+ RValue rvalue =
+ CGF.EmitCall(MSI.CallInfo, Callee, Return, ActualArgs, &CallSite);
// Mark the call as noreturn if the method is marked noreturn and the
// receiver cannot be null.
if (Method && Method->hasAttr<NoReturnAttr>() && !ReceiverCanBeNull) {
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index b854eeb62a80ce..56a831b13bd083 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -2622,8 +2622,9 @@ void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D,
// In the cross-dso CFI mode with canonical jump tables, we want !type
// attributes on definitions only.
- if (CodeGenOpts.SanitizeCfiCrossDso &&
- CodeGenOpts.SanitizeCfiCanonicalJumpTables) {
+ if ((CodeGenOpts.SanitizeCfiCrossDso &&
+ CodeGenOpts.SanitizeCfiCanonicalJumpTables) ||
+ CodeGenOpts.CallGraphSection) {
if (auto *FD = dyn_cast<FunctionDecl>(D)) {
// Skip available_externally functions. They won't be codegen'ed in the
// current module anyway.
@@ -2813,7 +2814,17 @@ static void setLinkageForGV(llvm::GlobalValue *GV, const NamedDecl *ND) {
void CodeGenModule::CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD,
llvm::Function *F) {
- // Only if we are checking indirect calls.
+ bool EmittedMDIdGeneralized = false;
+ if (CodeGenOpts.CallGraphSection &&
+ (!F->hasLocalLinkage() ||
+ F->getFunction().hasAddressTaken(nullptr, /*IgnoreCallbackUses=*/true,
+ /*IgnoreAssumeLikeCalls=*/true,
+ /*IgnoreLLVMUsed=*/false))) {
+ F->addTypeMetadata(0, CreateMetadataIdentifierGeneralized(FD->getType()));
+ EmittedMDIdGeneralized = true;
+ }
+
+ // Add additional metadata only if we are checking indirect calls with CFI.
if (!LangOpts.Sanitize.has(SanitizerKind::CFIICall))
return;
@@ -2824,7 +2835,9 @@ void CodeGenModule::CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD,
llvm::Metadata *MD = CreateMetadataIdentifierForType(FD->getType());
F->addTypeMetadata(0, MD);
- F->addTypeMetadata(0, CreateMetadataIdentifierGeneralized(FD->getType()));
+ // Add the generalized identifier if not added already.
+ if (!EmittedMDIdGeneralized)
+ F->addTypeMetadata(0, CreateMetadataIdentifierGeneralized(FD->getType()));
// Emit a hash-based bit set entry for cross-DSO calls.
if (CodeGenOpts.SanitizeCfiCrossDso)
@@ -2832,6 +2845,17 @@ void CodeGenModule::CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD,
F->addTypeMetadata(0, llvm::ConstantAsMetadata::get(CrossDsoTypeId));
}
+void CodeGenModule::CreateFunctionTypeMetadataForIcall(const QualType &QT,
+ llvm::CallBase *CB) {
+ // Only if needed for call graph section and only for indirect calls.
+ if (!CodeGenOpts.CallGraphSection || !CB || !CB->isIndirectCall())
+ return;
+
+ auto *MD = CreateMetadataIdentifierGeneralized(QT);
+ auto *MDN = llvm::MDNode::get(getLLVMContext(), MD);
+ CB->setMetadata(llvm::LLVMContext::MD_type, MDN);
+}
+
void CodeGenModule::setKCFIType(const FunctionDecl *FD, llvm::Function *F) {
llvm::LLVMContext &Ctx = F->getContext();
llvm::MDBuilder MDB(Ctx);
@@ -2959,7 +2983,8 @@ void CodeGenModule::SetFunctionAttributes(GlobalDecl GD, llvm::Function *F,
// are non-canonical then we need type metadata in order to produce the local
// jump table.
if (!CodeGenOpts.SanitizeCfiCrossDso ||
- !CodeGenOpts.SanitizeCfiCanonicalJumpTables)
+ !CodeGenOpts.SanitizeCfiCanonicalJumpTables ||
+ CodeGenOpts.CallGraphSection)
CreateFunctionTypeMetadataForIcall(FD, F);
if (LangOpts.Sanitize.has(SanitizerKind::KCFI))
diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
index 741b0f17da6584..bbaf5b150f1768 100644
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -1572,6 +1572,10 @@ class CodeGenModule : public CodeGenTypeCache {
void CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD,
llvm::Function *F);
+ /// Create and attach type metadata to the given call.
+ void CreateFunctionTypeMetadataForIcall(const QualType &QT,
+ llvm::CallBase *CB);
+
/// Set type metadata to the given function.
void setKCFIType(const FunctionDecl *FD, llvm::Function *F);
diff --git a/clang/test/CodeGen/call-graph-section-1.cpp b/clang/test/CodeGen/call-graph-section-1.cpp
new file mode 100644
index 00000000000000..25397e94422b7a
--- /dev/null
+++ b/clang/test/CodeGen/call-graph-section-1.cpp
@@ -0,0 +1,110 @@
+// Tests that we assign appropriate identifiers to indirect calls and targets
+// specifically for C++ class and instance methods.
+
+// RUN: %clang_cc1 -triple x86_64-unknown-linux -fcall-graph-section -S \
+// RUN: -emit-llvm -o %t %s
+// RUN: FileCheck --check-prefix=FT %s < %t
+// RUN: FileCheck --check-prefix=CST %s < %t
+
+////////////////////////////////////////////////////////////////////////////////
+// Class definitions (check for indirect target metadata)
+
+class Cls1 {
+public:
+ // FT-DAG: define {{.*}} ptr @_ZN4Cls18receiverEPcPf({{.*}} !type [[F_TCLS1RECEIVER:![0-9]+]]
+ static int *receiver(char *a, float *b) { return 0; }
+};
+
+class Cls2 {
+public:
+ int *(*fp)(char *, float *);
+
+ // FT-DAG: define {{.*}} i32 @_ZN4Cls22f1Ecfd({{.*}} !type [[F_TCLS2F1:![0-9]+]]
+ int f1(char a, float b, double c) { return 0; }
+
+ // FT-DAG: define {{.*}} ptr @_ZN4Cls22f2EPcPfPd({{.*}} !type [[F_TCLS2F2:![0-9]+]]
+ int *f2(char *a, float *b, double *c) { return 0; }
+
+ // FT-DAG: define {{.*}} void @_ZN4Cls22f3E4Cls1({{.*}} !type [[F_TCLS2F3F4:![0-9]+]]
+ void f3(Cls1 a) {}
+
+ // FT-DAG: define {{.*}} void @_ZN4Cls22f4E4Cls1({{.*}} !type [[F_TCLS2F3F4]]
+ void f4(const Cls1 a) {}
+
+ // FT-DAG: define {{.*}} void @_ZN4Cls22f5EP4Cls1({{.*}} !type [[F_TCLS2F5:![0-9]+]]
+ void f5(Cls1 *a) {}
+
+ // FT-DAG: define {{.*}} void @_ZN4Cls22f6EPK4Cls1({{.*}} !type [[F_TCLS2F6:![0-9]+]]
+ void f6(const Cls1 *a) {}
+
+ // FT-DAG: define {{.*}} void @_ZN4Cls22f7ER4Cls1({{.*}} !type [[F_TCLS2F7:![0-9]+]]
+ void f7(Cls1 &a) {}
+
+ // FT-DAG: define {{.*}} void @_ZN4Cls22f8ERK4Cls1({{.*}} !type [[F_TCLS2F8:![0-9]+]]
+ void f8(const Cls1 &a) {}
+
+ // FT-DAG: define {{.*}} void @_ZNK4Cls22f9Ev({{.*}} !type [[F_TCLS2F9:![0-9]+]]
+ void f9() const {}
+};
+
+// FT-DAG: [[F_TCLS1RECEIVER]] = !{i64 0, !"_ZTSFPvS_S_E.generalized"}
+// FT-DAG: [[F_TCLS2F2]] = !{i64 0, !"_ZTSFPvS_S_S_E.generalized"}
+// FT-DAG: [[F_TCLS2F1]] = !{i64 0, !"_ZTSFicfdE.generalized"}
+// FT-DAG: [[F_TCLS2F3F4]] = !{i64 0, !"_ZTSFv4Cls1E.generalized"}
+// FT-DAG: [[F_TCLS2F5]] = !{i64 0, !"_ZTSFvPvE.generalized"}
+// FT-DAG: [[F_TCLS2F6]] = !{i64 0, !"_ZTSFvPKvE.generalized"}
+// FT-DAG: [[F_TCLS2F7]] = !{i64 0, !"_ZTSFvR4Cls1E.generalized"}
+// FT-DAG: [[F_TCLS2F8]] = !{i64 0, !"_ZTSFvRK4Cls1E.generalized"}
+// FT-DAG: [[F_TCLS2F9]] = !{i64 0, !"_ZTSKFvvE.generalized"}
+
+////////////////////////////////////////////////////////////////////////////////
+// Callsites (check for indirect callsite operand bundles)
+
+// CST-LABEL: define {{.*}} @_Z3foov
+void foo() {
+ Cls2 ObjCls2;
+ ObjCls2.fp = &Cls1::receiver;
+
+ // CST: call noundef ptr %{{.*}} [ "type"(metadata !"_ZTSFPvS_S_E.generalized") ]
+ ObjCls2.fp(0, 0);
+
+ auto fp_f1 = &Cls2::f1;
+ auto fp_f2 = &Cls2::f2;
+ auto fp_f3 = &Cls2::f3;
+ auto fp_f4 = &Cls2::f4;
+ auto fp_f5 = &Cls2::f5;
+ auto fp_f6 = &Cls2::f6;
+ auto fp_f7 = &Cls2::f7;
+ auto fp_f8 = &Cls2::f8;
+ auto fp_f9 = &Cls2::f9;
+
+ Cls2 *ObjCls2Ptr = &ObjCls2;
+ Cls1 Cls1Param;
+
+ // CST: call noundef i32 %{{.*}} [ "type"(metadata !"_ZTSFicfdE.generalized") ]
+ (ObjCls2Ptr->*fp_f1)(0, 0, 0);
+
+ // CST: call noundef ptr %{{.*}} [ "type"(metadata !"_ZTSFPvS_S_S_E.generalized") ]
+ (ObjCls2Ptr->*fp_f2)(0, 0, 0);
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFv4Cls1E.generalized") ]
+ (ObjCls2Ptr->*fp_f3)(Cls1Param);
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFv4Cls1E.generalized") ]
+ (ObjCls2Ptr->*fp_f4)(Cls1Param);
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFvPvE.generalized") ]
+ (ObjCls2Ptr->*fp_f5)(&Cls1Param);
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFvPKvE.generalized") ]
+ (ObjCls2Ptr->*fp_f6)(&Cls1Param);
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFvR4Cls1E.generalized") ]
+ (ObjCls2Ptr->*fp_f7)(Cls1Param);
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFvRK4Cls1E.generalized") ]
+ (ObjCls2Ptr->*fp_f8)(Cls1Param);
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSKFvvE.generalized") ]
+ (ObjCls2Ptr->*fp_f9)();
+}
diff --git a/clang/test/CodeGen/call-graph-section-2.cpp b/clang/test/CodeGen/call-graph-section-2.cpp
new file mode 100644
index 00000000000000..4187faea495bee
--- /dev/null
+++ b/clang/test/CodeGen/call-graph-section-2.cpp
@@ -0,0 +1,95 @@
+// Tests that we assign appropriate identifiers to indirect calls and targets
+// specifically for C++ templates.
+
+// RUN: %clang_cc1 -triple x86_64-unknown-linux -fcall-graph-section -S \
+// RUN: -emit-llvm -o %t %s
+// RUN: FileCheck --check-prefix=FT %s < %t
+// RUN: FileCheck --check-prefix=CST %s < %t
+// RUN: FileCheck --check-prefix=CHECK %s < %t
+
+////////////////////////////////////////////////////////////////////////////////
+// Class definitions and template classes (check for indirect target metadata)
+
+class Cls1 {};
+
+// Cls2 is instantiated with T=Cls1 in foo(). Following checks are for this
+// instantiation.
+template <class T>
+class Cls2 {
+public:
+ // FT: define {{.*}} void @_ZN4Cls2I4Cls1E2f1Ev({{.*}} !type [[F_TCLS2F1:![0-9]+]]
+ void f1() {}
+
+ // FT: define {{.*}} void @_ZN4Cls2I4Cls1E2f2ES0_({{.*}} !type [[F_TCLS2F2:![0-9]+]]
+ void f2(T a) {}
+
+ // FT: define {{.*}} void @_ZN4Cls2I4Cls1E2f3EPS0_({{.*}} !type [[F_TCLS2F3:![0-9]+]]
+ void f3(T *a) {}
+
+ // FT: define {{.*}} void @_ZN4Cls2I4Cls1E2f4EPKS0_({{.*}} !type [[F_TCLS2F4:![0-9]+]]
+ void f4(const T *a) {}
+
+ // FT: define {{.*}} void @_ZN4Cls2I4Cls1E2f5ERS0_({{.*}} !type [[F_TCLS2F5:![0-9]+]]
+ void f5(T &a) {}
+
+ // FT: define {{.*}} void @_ZN4Cls2I4Cls1E2f6ERKS0_({{.*}} !type [[F_TCLS2F6:![0-9]+]]
+ void f6(const T &a) {}
+
+ // Mixed type function pointer member
+ T *(*fp)(T a, T *b, const T *c, T &d, const T &e);
+};
+
+// FT-DAG: [[F_TCLS2F1]] = !{i64 0, !"_ZTSFvvE.generalized"}
+// FT-DAG: [[F_TCLS2F2]] = !{i64 0, !"_ZTSFv4Cls1E.generalized"}
+// FT-DAG: [[F_TCLS2F3]] = !{i64 0, !"_ZTSFvPvE.generalized"}
+// FT-DAG: [[F_TCLS2F4]] = !{i64 0, !"_ZTSFvPKvE.generalized"}
+// FT-DAG: [[F_TCLS2F5]] = !{i64 0, !"_ZTSFvR4Cls1E.generalized"}
+// FT-DAG: [[F_TCLS2F6]] = !{i64 0, !"_ZTSFvRK4Cls1E.generalized"}
+
+////////////////////////////////////////////////////////////////////////////////
+// Callsites (check for indirect callsite operand bundles)
+
+template <class T>
+T *T_func(T a, T *b, const T *c, T &d, const T &e) { return b; }
+
+// CST-LABEL: define {{.*}} @_Z3foov
+void foo() {
+ // Methods for Cls2<Cls1> is checked above within the template description.
+ Cls2<Cls1> Obj;
+
+ // CHECK-DAG: define {{.*}} @_Z6T_funcI4Cls1EPT_S1_S2_PKS1_RS1_RS3_({{.*}} !type [[F_TFUNC_CLS1:![0-9]+]]
+ // CHECK-DAG: [[F_TFUNC_CLS1]] = !{i64 0, !"_ZTSFPv4Cls1S_PKvRS0_RKS0_E.generalized"}
+ Obj.fp = T_func<Cls1>;
+ Cls1 Cls1Obj;
+
+ // CST: call noundef ptr %{{.*}} [ "type"(metadata !"_ZTSFPv4Cls1S_PKvRS0_RKS0_E.generalized") ]
+ Obj.fp(Cls1Obj, &Cls1Obj, &Cls1Obj, Cls1Obj, Cls1Obj);
+
+ // Make indirect calls to Cls2's member methods
+ auto fp_f1 = &Cls2<Cls1>::f1;
+ auto fp_f2 = &Cls2<Cls1>::f2;
+ auto fp_f3 = &Cls2<Cls1>::f3;
+ auto fp_f4 = &Cls2<Cls1>::f4;
+ auto fp_f5 = &Cls2<Cls1>::f5;
+ auto fp_f6 = &Cls2<Cls1>::f6;
+
+ auto *Obj2Ptr = &Obj;
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFvvE.generalized") ]
+ (Obj2Ptr->*fp_f1)();
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFv4Cls1E.generalized") ]
+ (Obj2Ptr->*fp_f2)(Cls1Obj);
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFvPvE.generalized") ]
+ (Obj2Ptr->*fp_f3)(&Cls1Obj);
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFvPKvE.generalized") ]
+ (Obj2Ptr->*fp_f4)(&Cls1Obj);
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFvR4Cls1E.generalized") ]
+ (Obj2Ptr->*fp_f5)(Cls1Obj);
+
+ // CST: call void %{{.*}} [ "type"(metadata !"_ZTSFvRK4Cls1E.generalized") ]
+ (Obj2Ptr->*fp_f6)(Cls1Obj);
+}
diff --git a/clang/test/CodeGen/call-graph-section-3.cpp b/clang/test/CodeGen/call-graph-section-3.cpp
new file mode 100644
index 00000000000000..77bb110c664ef6
--- /dev/null
+++ b/clang/test/CodeGen/call-graph-section-3.cpp
@@ -0,0 +1,52 @@
+// Tests that we assign appropriate identifiers to indirect calls and targets
+// specifically for virtual methods.
+
+// RUN: %clang_cc1 -triple x86_64-unknown-linux -fcall-graph-section -S \
+// RUN: -emit-llvm -o %t %s
+// RUN: FileCheck --check-prefix=FT %s < %t
+// RUN: FileCheck --check-prefix=CST %s < %t
+
+////////////////////////////////////////////////////////////////////////////////
+// Class definitions (check for indirect target metadata)
+
+class Base {
+public:
+ // FT-DAG: define {{.*}} @_ZN4Base2vfEPc({{.*}} !type [[F_TVF:![0-9]+]]
+ virtual int vf(char *a) { return 0; };
+};
+
+class Derived : public Base {
+public:
+ // FT-DAG: define {{.*}} @_ZN7Derived2vfEPc({{.*}} !type [[F_TVF]]
+ int vf(char *a) override { return 1; };
+};
+
+// FT-DAG: [[F_TVF]] = !{i64 0, !"_ZTSFiPvE.generalized"}
+
+////////////////////////////////////////////////////////////////////////////////
+// Callsites (check for indirect callsite operand bundles)
+
+// CST-LABEL: define {{.*}} @_Z3foov
+void foo() {
+ auto B = Base();
+ auto D = Derived();
+
+ Base *Bptr = &B;
+ Base *BptrToD = &D;
+ Derived *Dptr = &D;
+
+ auto FpBaseVf = &Base::vf;
+ auto FpDerivedVf = &Derived::vf;
+
+ // CST: call noundef i32 %{{.*}} [ "type"(metadata !"_ZTSFiPvE.generalized") ]
+ (Bptr->*FpBaseVf)(0);
+
+ // CST: call noundef i32 %{{.*}} [ "type"(metadata !"_ZTSFiPvE.generalized") ]
+ (BptrToD->*FpBaseVf)(0);
+
+ // CST: call noundef i32 %{{.*}} [ "type"(metadata !"_ZTSFiPvE.generalized") ]
+ (Dptr->*FpBaseVf)(0);
+
+ // CST: call noundef i32 %{{.*}} [ "type"(metadata !"_ZTSFiPvE.generalized") ]
+ (Dptr->*FpDerivedVf)(0);
+}
diff --git a/clang/test/CodeGen/call-graph-section.c b/clang/test/CodeGen/call-graph-section.c
new file mode 100644
index 00000000000000..ed1bdb876152aa
--- /dev/null
+++ b/clang/test/CodeGen/call-graph-section.c
@@ -0,0 +1,85 @@
+// Tests that we assign appropriate identifiers to indirect calls and targets.
+
+// RUN: %clang_cc1 -triple x86_64-unknown-linux -fcall-graph-section -S \
+// RUN: -emit-llvm -o - %s | FileCheck --check-prefixes=CHECK,ITANIUM %s
+
+// RUN: %clang_cc1 -triple x86_64-pc-windows-msvc -fcall-graph-section -S \
+// RUN: -emit-llvm -o - %s | FileCheck --check-prefixes=CHECK,MS %s
+
+// CHECK-DAG: define {{(dso_local)?}} void @foo({{.*}} !type [[F_TVOID:![0-9]+]]
+void foo() {
+}
+
+// CHECK-DAG: define {{(dso_local)?}} void @bar({{.*}} !type [[F_TVOID]]
+void bar() {
+ void (*fp)() = foo;
+ // ITANIUM: call {{.*}} [ "type"(metadata !"_ZTSFvE.generalized") ]
+ // MS: call {{.*}} [ "type"(metadata !"?6AX at Z.generalized") ]
+ fp();
+}
+
+// CHECK-DAG: define {{(dso_local)?}} i32 @baz({{.*}} !type [[F_TPRIMITIVE:![0-9]+]]
+int baz(char a, float b, double c) {
+ return 1;
+}
+
+// CHECK-DAG: define {{(dso_local)?}} ptr @qux({{.*}} !type [[F_TPTR:![0-9]+]]
+int *qux(char *a, float *b, double *c) {
+ return 0;
+}
+
+// CHECK-DAG: define {{(dso_local)?}} void @corge({{.*}} !type [[F_TVOID]]
+void corge() {
+ int (*fp_baz)(char, float, double) = baz;
+ // ITANIUM: call i32 {{.*}} [ "type"(metadata !"_ZTSFicfdE.generalized") ]
+ // MS: call i32 {{.*}} [ "type"(metadata !"?6AHDMN at Z.generalized") ]
+ fp_baz('a', .0f, .0);
+
+ int *(*fp_qux)(char *, float *, double *) = qux;
+ // ITANIUM: call ptr {{.*}} [ "type"(metadata !"_ZTSFPvS_S_S_E.generalized") ]
+ // MS: call ptr {{.*}} [ "type"(metadata !"?6APEAXPEAX00 at Z.generalized") ]
+ fp_qux(0, 0, 0);
+}
+
+struct st1 {
+ int *(*fp)(char *, float *, double *);
+};
+
+struct st2 {
+ struct st1 m;
+};
+
+// CHECK-DAG: define {{(dso_local)?}} void @stparam({{.*}} !type [[F_TSTRUCT:![0-9]+]]
+void stparam(struct st2 a, struct st2 *b) {}
+
+// CHECK-DAG: define {{(dso_local)?}} void @stf({{.*}} !type [[F_TVOID]]
+void stf() {
+ struct st1 St1;
+ St1.f...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/117036
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