forked from OSchip/llvm-project
128 lines
4.6 KiB
C++
128 lines
4.6 KiB
C++
//===- ForceFunctionAttrs.cpp - Force function attrs for debugging --------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Transforms/IPO/ForceFunctionAttrs.h"
|
|
#include "llvm/ADT/StringSwitch.h"
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "forceattrs"
|
|
|
|
static cl::list<std::string>
|
|
ForceAttributes("force-attribute", cl::Hidden,
|
|
cl::desc("Add an attribute to a function. This should be a "
|
|
"pair of 'function-name:attribute-name', for "
|
|
"example -force-attribute=foo:noinline. This "
|
|
"option can be specified multiple times."));
|
|
|
|
static Attribute::AttrKind parseAttrKind(StringRef Kind) {
|
|
return StringSwitch<Attribute::AttrKind>(Kind)
|
|
.Case("alwaysinline", Attribute::AlwaysInline)
|
|
.Case("builtin", Attribute::Builtin)
|
|
.Case("cold", Attribute::Cold)
|
|
.Case("convergent", Attribute::Convergent)
|
|
.Case("inlinehint", Attribute::InlineHint)
|
|
.Case("jumptable", Attribute::JumpTable)
|
|
.Case("minsize", Attribute::MinSize)
|
|
.Case("naked", Attribute::Naked)
|
|
.Case("nobuiltin", Attribute::NoBuiltin)
|
|
.Case("noduplicate", Attribute::NoDuplicate)
|
|
.Case("noimplicitfloat", Attribute::NoImplicitFloat)
|
|
.Case("noinline", Attribute::NoInline)
|
|
.Case("nonlazybind", Attribute::NonLazyBind)
|
|
.Case("noredzone", Attribute::NoRedZone)
|
|
.Case("noreturn", Attribute::NoReturn)
|
|
.Case("nocf_check", Attribute::NoCfCheck)
|
|
.Case("norecurse", Attribute::NoRecurse)
|
|
.Case("nounwind", Attribute::NoUnwind)
|
|
.Case("optforfuzzing", Attribute::OptForFuzzing)
|
|
.Case("optnone", Attribute::OptimizeNone)
|
|
.Case("optsize", Attribute::OptimizeForSize)
|
|
.Case("readnone", Attribute::ReadNone)
|
|
.Case("readonly", Attribute::ReadOnly)
|
|
.Case("argmemonly", Attribute::ArgMemOnly)
|
|
.Case("returns_twice", Attribute::ReturnsTwice)
|
|
.Case("safestack", Attribute::SafeStack)
|
|
.Case("shadowcallstack", Attribute::ShadowCallStack)
|
|
.Case("sanitize_address", Attribute::SanitizeAddress)
|
|
.Case("sanitize_hwaddress", Attribute::SanitizeHWAddress)
|
|
.Case("sanitize_memory", Attribute::SanitizeMemory)
|
|
.Case("sanitize_thread", Attribute::SanitizeThread)
|
|
.Case("ssp", Attribute::StackProtect)
|
|
.Case("sspreq", Attribute::StackProtectReq)
|
|
.Case("sspstrong", Attribute::StackProtectStrong)
|
|
.Case("strictfp", Attribute::StrictFP)
|
|
.Case("uwtable", Attribute::UWTable)
|
|
.Default(Attribute::None);
|
|
}
|
|
|
|
/// If F has any forced attributes given on the command line, add them.
|
|
static void addForcedAttributes(Function &F) {
|
|
for (auto &S : ForceAttributes) {
|
|
auto KV = StringRef(S).split(':');
|
|
if (KV.first != F.getName())
|
|
continue;
|
|
|
|
auto Kind = parseAttrKind(KV.second);
|
|
if (Kind == Attribute::None) {
|
|
LLVM_DEBUG(dbgs() << "ForcedAttribute: " << KV.second
|
|
<< " unknown or not handled!\n");
|
|
continue;
|
|
}
|
|
if (F.hasFnAttribute(Kind))
|
|
continue;
|
|
F.addFnAttr(Kind);
|
|
}
|
|
}
|
|
|
|
PreservedAnalyses ForceFunctionAttrsPass::run(Module &M,
|
|
ModuleAnalysisManager &) {
|
|
if (ForceAttributes.empty())
|
|
return PreservedAnalyses::all();
|
|
|
|
for (Function &F : M.functions())
|
|
addForcedAttributes(F);
|
|
|
|
// Just conservatively invalidate analyses, this isn't likely to be important.
|
|
return PreservedAnalyses::none();
|
|
}
|
|
|
|
namespace {
|
|
struct ForceFunctionAttrsLegacyPass : public ModulePass {
|
|
static char ID; // Pass identification, replacement for typeid
|
|
ForceFunctionAttrsLegacyPass() : ModulePass(ID) {
|
|
initializeForceFunctionAttrsLegacyPassPass(
|
|
*PassRegistry::getPassRegistry());
|
|
}
|
|
|
|
bool runOnModule(Module &M) override {
|
|
if (ForceAttributes.empty())
|
|
return false;
|
|
|
|
for (Function &F : M.functions())
|
|
addForcedAttributes(F);
|
|
|
|
// Conservatively assume we changed something.
|
|
return true;
|
|
}
|
|
};
|
|
}
|
|
|
|
char ForceFunctionAttrsLegacyPass::ID = 0;
|
|
INITIALIZE_PASS(ForceFunctionAttrsLegacyPass, "forceattrs",
|
|
"Force set function attributes", false, false)
|
|
|
|
Pass *llvm::createForceFunctionAttrsLegacyPass() {
|
|
return new ForceFunctionAttrsLegacyPass();
|
|
}
|