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RedBear-OS/local/recipes/dev/libclc/source/llvm/unittests/Bitcode/BitReaderTest.cpp
T
vasilito cb424d7448 build: static patch-sanity linter (shift-left the malformed-patch class) 
verify-patch-sanity.py validates every active recipe .patch has internally-
consistent hunk line counts — catching the 'malformed patch at line N' failure
at commit/CI/preflight time instead of hours into a cook. This cycle hit that
class three times (qtwaylandscanner, sddm, xwayland), each only discovered when
cookbook tried to apply the patch.

Running it across the repo found 29 latent malformed patches (validated against
GNU patch: e.g. relibc/P3-sysv-ipc reproduces 'malformed patch at line 22').
They were harmless only because they sit in vendored recipes (baked, not re-
applied) — but would fail on any version-bump re-derivation. --fix recounts the
hunk headers (body untouched) and repaired all 29.

Wired into build-preflight.sh (Phase 1.0D) and redbear-ci.yml, with a unit test
(test-patch-sanity.sh). Skips archived/legacy trees and unvalidatable formats
(empty placeholders, bare-@@ git hunks).
2026-08-01 05:13:02 +03:00

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//===- llvm/unittest/Bitcode/BitReaderTest.cpp - Tests for BitReader ------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "BitReaderTestCode.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Verifier.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
std::unique_ptr<Module> parseAssembly(LLVMContext &Context,
const char *Assembly) {
SMDiagnostic Error;
std::unique_ptr<Module> M = parseAssemblyString(Assembly, Error, Context);
std::string ErrMsg;
raw_string_ostream OS(ErrMsg);
Error.print("", OS);
// A failure here means that the test itself is buggy.
if (!M)
report_fatal_error(ErrMsg.c_str());
return M;
}
static void writeModuleToBuffer(std::unique_ptr<Module> Mod,
SmallVectorImpl<char> &Buffer) {
raw_svector_ostream OS(Buffer);
WriteBitcodeToFile(*Mod, OS);
}
static std::unique_ptr<Module> getLazyModuleFromAssembly(LLVMContext &Context,
SmallString<1024> &Mem,
const char *Assembly) {
writeModuleToBuffer(parseAssembly(Context, Assembly), Mem);
Expected<std::unique_ptr<Module>> ModuleOrErr =
getLazyBitcodeModule(MemoryBufferRef(Mem.str(), "test"), Context);
if (!ModuleOrErr)
report_fatal_error("Could not parse bitcode module");
return std::move(ModuleOrErr.get());
}
// Tests that lazy evaluation can parse functions out of order.
TEST(BitReaderTest, MaterializeFunctionsOutOfOrder) {
SmallString<1024> Mem;
LLVMContext Context;
std::unique_ptr<Module> M = getLazyModuleFromAssembly(
Context, Mem, "define void @f() {\n"
" unreachable\n"
"}\n"
"define void @g() {\n"
" unreachable\n"
"}\n"
"define void @h() {\n"
" unreachable\n"
"}\n"
"define void @j() {\n"
" unreachable\n"
"}\n");
EXPECT_FALSE(verifyModule(*M, &dbgs()));
Function *F = M->getFunction("f");
Function *G = M->getFunction("g");
Function *H = M->getFunction("h");
Function *J = M->getFunction("j");
// Initially all functions are not materialized (no basic blocks).
EXPECT_TRUE(F->empty());
EXPECT_TRUE(G->empty());
EXPECT_TRUE(H->empty());
EXPECT_TRUE(J->empty());
EXPECT_FALSE(verifyModule(*M, &dbgs()));
// Materialize h.
ASSERT_FALSE(H->materialize());
EXPECT_TRUE(F->empty());
EXPECT_TRUE(G->empty());
EXPECT_FALSE(H->empty());
EXPECT_TRUE(J->empty());
EXPECT_FALSE(verifyModule(*M, &dbgs()));
// Materialize g.
ASSERT_FALSE(G->materialize());
EXPECT_TRUE(F->empty());
EXPECT_FALSE(G->empty());
EXPECT_FALSE(H->empty());
EXPECT_TRUE(J->empty());
EXPECT_FALSE(verifyModule(*M, &dbgs()));
// Materialize j.
ASSERT_FALSE(J->materialize());
EXPECT_TRUE(F->empty());
EXPECT_FALSE(G->empty());
EXPECT_FALSE(H->empty());
EXPECT_FALSE(J->empty());
EXPECT_FALSE(verifyModule(*M, &dbgs()));
// Materialize f.
ASSERT_FALSE(F->materialize());
EXPECT_FALSE(F->empty());
EXPECT_FALSE(G->empty());
EXPECT_FALSE(H->empty());
EXPECT_FALSE(J->empty());
EXPECT_FALSE(verifyModule(*M, &dbgs()));
}
TEST(BitReaderTest, MaterializeFunctionsStrictFP) {
SmallString<1024> Mem;
LLVMContext Context;
std::unique_ptr<Module> M = getLazyModuleFromAssembly(
Context, Mem, "define double @foo(double %a) {\n"
" %result = call double @bar(double %a) strictfp\n"
" ret double %result\n"
"}\n"
"declare double @bar(double)\n");
Function *Foo = M->getFunction("foo");
ASSERT_FALSE(Foo->materialize());
EXPECT_FALSE(Foo->empty());
for (auto &BB : *Foo) {
auto It = BB.begin();
while (It != BB.end()) {
Instruction &I = *It;
++It;
if (auto *Call = dyn_cast<CallBase>(&I)) {
EXPECT_FALSE(Call->isStrictFP());
EXPECT_TRUE(Call->isNoBuiltin());
}
}
}
EXPECT_FALSE(verifyModule(*M, &dbgs()));
}
TEST(BitReaderTest, MaterializeConstrainedFPStrictFP) {
SmallString<1024> Mem;
LLVMContext Context;
std::unique_ptr<Module> M = getLazyModuleFromAssembly(
Context, Mem,
"define double @foo(double %a) strictfp {\n"
" %result = call double @llvm.experimental.constrained.sqrt.f64(double "
"%a, metadata !\"round.tonearest\", metadata !\"fpexcept.strict\") "
"strictfp\n"
" ret double %result\n"
"}\n"
"declare double @llvm.experimental.constrained.sqrt.f64(double, "
"metadata, metadata)\n");
Function *Foo = M->getFunction("foo");
ASSERT_FALSE(Foo->materialize());
EXPECT_FALSE(Foo->empty());
for (auto &BB : *Foo) {
auto It = BB.begin();
while (It != BB.end()) {
Instruction &I = *It;
++It;
if (auto *Call = dyn_cast<CallBase>(&I)) {
EXPECT_TRUE(Call->isStrictFP());
EXPECT_FALSE(Call->isNoBuiltin());
}
}
}
EXPECT_FALSE(verifyModule(*M, &dbgs()));
}
TEST(BitReaderTest, MaterializeFunctionsForBlockAddr) { // PR11677
SmallString<1024> Mem;
LLVMContext Context;
std::unique_ptr<Module> M = getLazyModuleFromAssembly(
Context, Mem, "@table = constant i8* blockaddress(@func, %bb)\n"
"define void @func() {\n"
" unreachable\n"
"bb:\n"
" unreachable\n"
"}\n");
EXPECT_FALSE(verifyModule(*M, &dbgs()));
EXPECT_FALSE(M->getFunction("func")->empty());
}
TEST(BitReaderTest, MaterializeFunctionsForBlockAddrInFunctionBefore) {
SmallString<1024> Mem;
LLVMContext Context;
std::unique_ptr<Module> M = getLazyModuleFromAssembly(
Context, Mem, "define i8* @before() {\n"
" ret i8* blockaddress(@func, %bb)\n"
"}\n"
"define void @other() {\n"
" unreachable\n"
"}\n"
"define void @func() {\n"
" unreachable\n"
"bb:\n"
" unreachable\n"
"}\n");
EXPECT_TRUE(M->getFunction("before")->empty());
EXPECT_TRUE(M->getFunction("func")->empty());
EXPECT_FALSE(verifyModule(*M, &dbgs()));
// Materialize @before, pulling in @func.
EXPECT_FALSE(M->getFunction("before")->materialize());
EXPECT_FALSE(M->getFunction("func")->empty());
EXPECT_TRUE(M->getFunction("other")->empty());
EXPECT_FALSE(verifyModule(*M, &dbgs()));
}
TEST(BitReaderTest, MaterializeFunctionsForBlockAddrInFunctionAfter) {
SmallString<1024> Mem;
LLVMContext Context;
std::unique_ptr<Module> M = getLazyModuleFromAssembly(
Context, Mem, "define void @func() {\n"
" unreachable\n"
"bb:\n"
" unreachable\n"
"}\n"
"define void @other() {\n"
" unreachable\n"
"}\n"
"define i8* @after() {\n"
" ret i8* blockaddress(@func, %bb)\n"
"}\n");
EXPECT_TRUE(M->getFunction("after")->empty());
EXPECT_TRUE(M->getFunction("func")->empty());
EXPECT_FALSE(verifyModule(*M, &dbgs()));
// Materialize @after, pulling in @func.
EXPECT_FALSE(M->getFunction("after")->materialize());
EXPECT_FALSE(M->getFunction("func")->empty());
EXPECT_TRUE(M->getFunction("other")->empty());
EXPECT_FALSE(verifyModule(*M, &dbgs()));
}
// Helper function to convert type metadata to a string for testing
static std::string mdToString(Metadata *MD) {
std::string S;
if (auto *VMD = dyn_cast<ValueAsMetadata>(MD)) {
if (VMD->getType()->isPointerTy()) {
S += "ptr";
return S;
}
}
if (auto *TMD = dyn_cast<MDTuple>(MD)) {
S += "!{";
for (unsigned I = 0; I < TMD->getNumOperands(); I++) {
if (I != 0)
S += ", ";
S += mdToString(TMD->getOperand(I).get());
}
S += "}";
} else if (auto *SMD = dyn_cast<MDString>(MD)) {
S += "!'";
S += SMD->getString();
S += "'";
} else if (auto *I = mdconst::dyn_extract<ConstantInt>(MD)) {
S += std::to_string(I->getZExtValue());
} else if (auto *P = mdconst::dyn_extract<PoisonValue>(MD)) {
auto *Ty = P->getType();
if (Ty->isIntegerTy()) {
S += "i";
S += std::to_string(Ty->getIntegerBitWidth());
} else if (Ty->isStructTy()) {
S += "%";
S += Ty->getStructName();
} else {
llvm_unreachable("unhandled poison metadata");
}
} else {
llvm_unreachable("unhandled metadata");
}
return S;
}
// Recursively look into a (pointer) type and the the type.
// For primitive types it's a poison value of the type, for a pointer it's a
// metadata tuple with the addrspace and the referenced type. For a function,
// it's a tuple where the first element is the string "function", the second
// element is the return type or the string "void" and the following elements
// are the argument types.
static Metadata *getTypeMetadataEntry(unsigned TypeID, LLVMContext &Context,
GetTypeByIDTy GetTypeByID,
GetContainedTypeIDTy GetContainedTypeID) {
Type *Ty = GetTypeByID(TypeID);
if (auto *FTy = dyn_cast<FunctionType>(Ty)) {
// Save the function signature as metadata
SmallVector<Metadata *> SignatureMD;
SignatureMD.push_back(MDString::get(Context, "function"));
// Return type
if (FTy->getReturnType()->isVoidTy())
SignatureMD.push_back(MDString::get(Context, "void"));
else
SignatureMD.push_back(getTypeMetadataEntry(GetContainedTypeID(TypeID, 0),
Context, GetTypeByID,
GetContainedTypeID));
// Arguments
for (unsigned I = 0; I != FTy->getNumParams(); ++I)
SignatureMD.push_back(
getTypeMetadataEntry(GetContainedTypeID(TypeID, I + 1), Context,
GetTypeByID, GetContainedTypeID));
return MDTuple::get(Context, SignatureMD);
}
if (!Ty->isPointerTy())
return ConstantAsMetadata::get(PoisonValue::get(Ty));
// Return !{<addrspace>, <inner>} for pointer
SmallVector<Metadata *, 2> MD;
MD.push_back(ConstantAsMetadata::get(ConstantInt::get(
Type::getInt32Ty(Context), Ty->getPointerAddressSpace())));
MD.push_back(getTypeMetadataEntry(GetContainedTypeID(TypeID, 0), Context,
GetTypeByID, GetContainedTypeID));
return MDTuple::get(Context, MD);
}
// Test that when reading bitcode with typed pointers and upgrading them to
// opaque pointers, the type information of function signatures can be extracted
// and stored in metadata.
TEST(BitReaderTest, AccessFunctionTypeInfo) {
StringRef Bitcode(reinterpret_cast<const char *>(AccessFunctionTypeInfoBc),
sizeof(AccessFunctionTypeInfoBc));
LLVMContext Context;
ParserCallbacks Callbacks;
// Supply a callback that stores the signature of a function into metadata,
// so that the types behind pointers can be accessed.
// Each function gets a !types metadata, which is a tuple with one element
// for a non-void return type and every argument. For primitive types it's
// a poison value of the type, for a pointer it's a metadata tuple with
// the addrspace and the referenced type.
Callbacks.ValueType = [&](Value *V, unsigned TypeID,
GetTypeByIDTy GetTypeByID,
GetContainedTypeIDTy GetContainedTypeID) {
if (auto *F = dyn_cast<Function>(V)) {
auto *MD = getTypeMetadataEntry(TypeID, F->getContext(), GetTypeByID,
GetContainedTypeID);
F->setMetadata("types", cast<MDNode>(MD));
}
};
Expected<std::unique_ptr<Module>> ModuleOrErr =
parseBitcodeFile(MemoryBufferRef(Bitcode, "test"), Context, Callbacks);
if (!ModuleOrErr)
report_fatal_error("Could not parse bitcode module");
std::unique_ptr<Module> M = std::move(ModuleOrErr.get());
EXPECT_EQ(mdToString(M->getFunction("func")->getMetadata("types")),
"!{!'function', !'void'}");
EXPECT_EQ(mdToString(M->getFunction("func_header")->getMetadata("types")),
"!{!'function', i32}");
EXPECT_EQ(mdToString(M->getFunction("ret_ptr")->getMetadata("types")),
"!{!'function', !{0, i8}}");
EXPECT_EQ(mdToString(M->getFunction("ret_and_arg_ptr")->getMetadata("types")),
"!{!'function', !{0, i8}, !{8, i32}}");
EXPECT_EQ(mdToString(M->getFunction("double_ptr")->getMetadata("types")),
"!{!'function', !{1, i8}, !{2, !{0, i32}}, !{0, !{0, !{0, i32}}}}");
}
// Test that when reading bitcode with typed pointers and upgrading them to
// opaque pointers, the type information of pointers in metadata can be
// extracted and stored in metadata.
TEST(BitReaderTest, AccessMetadataTypeInfo) {
StringRef Bitcode(reinterpret_cast<const char *>(AccessMetadataTypeInfoBc),
sizeof(AccessFunctionTypeInfoBc));
LLVMContext Context;
ParserCallbacks Callbacks;
// Supply a callback that stores types from metadata,
// so that the types behind pointers can be accessed.
// Non-pointer entries are ignored. Values with a pointer type are
// replaced by a metadata tuple with {original value, type md}. We cannot
// save the metadata outside because after conversion to opaque pointers,
// entries are not distinguishable anymore (e.g. i32* and i8* are both
// upgraded to ptr).
Callbacks.MDType = [&](Metadata **Val, unsigned TypeID,
GetTypeByIDTy GetTypeByID,
GetContainedTypeIDTy GetContainedTypeID) {
auto *OrigVal = cast<ValueAsMetadata>(*Val);
if (OrigVal->getType()->isPointerTy()) {
// Ignore function references, their signature can be saved like
// in the test above
if (!isa<Function>(OrigVal->getValue())) {
SmallVector<Metadata *> Tuple;
Tuple.push_back(OrigVal);
Tuple.push_back(getTypeMetadataEntry(GetContainedTypeID(TypeID, 0),
OrigVal->getContext(), GetTypeByID,
GetContainedTypeID));
*Val = MDTuple::get(OrigVal->getContext(), Tuple);
}
}
};
Expected<std::unique_ptr<Module>> ModuleOrErr =
parseBitcodeFile(MemoryBufferRef(Bitcode, "test"), Context, Callbacks);
if (!ModuleOrErr)
report_fatal_error("Could not parse bitcode module");
std::unique_ptr<Module> M = std::move(ModuleOrErr.get());
EXPECT_EQ(
mdToString(M->getNamedMetadata("md")->getOperand(0)),
"!{2, !{ptr, %dx.types.f32}, ptr, !{ptr, !{!'function', !'void'}}}");
EXPECT_EQ(mdToString(M->getNamedMetadata("md2")->getOperand(0)),
"!{!{ptr, !{!'function', !{0, i8}, !{2, !{0, i32}}}}, !{ptr, !{0, "
"!{0, i32}}}}");
}
} // end namespace
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