Don't make assumptions about the name of private global variables.
Private variables are can be renamed, so it is not reliable to make decisions on the name. The name is also dropped by the assembler before getting to the linker, so using the name causes a disconnect between how llvm makes a decision (var name) and how the linker makes a decision (section it is in). This patch changes one case where we were looking at the variable name to use the section instead. Test tuning by Michael Gottesman. llvm-svn: 222061
This commit is contained in:
parent
183cb6e35d
commit
2fc723099f
|
@ -107,6 +107,8 @@ namespace llvm {
|
||||||
//
|
//
|
||||||
ImmutablePass *createObjCARCAliasAnalysisPass();
|
ImmutablePass *createObjCARCAliasAnalysisPass();
|
||||||
|
|
||||||
|
FunctionPass *createPAEvalPass();
|
||||||
|
|
||||||
//===--------------------------------------------------------------------===//
|
//===--------------------------------------------------------------------===//
|
||||||
//
|
//
|
||||||
/// createLazyValueInfoPass - This creates an instance of the LazyValueInfo
|
/// createLazyValueInfoPass - This creates an instance of the LazyValueInfo
|
||||||
|
|
|
@ -211,6 +211,7 @@ void initializeObjCARCAPElimPass(PassRegistry&);
|
||||||
void initializeObjCARCExpandPass(PassRegistry&);
|
void initializeObjCARCExpandPass(PassRegistry&);
|
||||||
void initializeObjCARCContractPass(PassRegistry&);
|
void initializeObjCARCContractPass(PassRegistry&);
|
||||||
void initializeObjCARCOptPass(PassRegistry&);
|
void initializeObjCARCOptPass(PassRegistry&);
|
||||||
|
void initializePAEvalPass(PassRegistry &);
|
||||||
void initializeOptimizePHIsPass(PassRegistry&);
|
void initializeOptimizePHIsPass(PassRegistry&);
|
||||||
void initializePartiallyInlineLibCallsPass(PassRegistry&);
|
void initializePartiallyInlineLibCallsPass(PassRegistry&);
|
||||||
void initializePEIPass(PassRegistry&);
|
void initializePEIPass(PassRegistry&);
|
||||||
|
|
|
@ -111,6 +111,7 @@ namespace {
|
||||||
(void) llvm::createObjCARCExpandPass();
|
(void) llvm::createObjCARCExpandPass();
|
||||||
(void) llvm::createObjCARCContractPass();
|
(void) llvm::createObjCARCContractPass();
|
||||||
(void) llvm::createObjCARCOptPass();
|
(void) llvm::createObjCARCOptPass();
|
||||||
|
(void) llvm::createPAEvalPass();
|
||||||
(void) llvm::createPromoteMemoryToRegisterPass();
|
(void) llvm::createPromoteMemoryToRegisterPass();
|
||||||
(void) llvm::createDemoteRegisterToMemoryPass();
|
(void) llvm::createDemoteRegisterToMemoryPass();
|
||||||
(void) llvm::createPruneEHPass();
|
(void) llvm::createPruneEHPass();
|
||||||
|
|
|
@ -68,6 +68,7 @@ void llvm::initializeAnalysis(PassRegistry &Registry) {
|
||||||
initializeTargetTransformInfoAnalysisGroup(Registry);
|
initializeTargetTransformInfoAnalysisGroup(Registry);
|
||||||
initializeTypeBasedAliasAnalysisPass(Registry);
|
initializeTypeBasedAliasAnalysisPass(Registry);
|
||||||
initializeScopedNoAliasAAPass(Registry);
|
initializeScopedNoAliasAAPass(Registry);
|
||||||
|
initializePAEvalPass(Registry);
|
||||||
}
|
}
|
||||||
|
|
||||||
void LLVMInitializeAnalysis(LLVMPassRegistryRef R) {
|
void LLVMInitializeAnalysis(LLVMPassRegistryRef R) {
|
||||||
|
|
|
@ -8,6 +8,7 @@ add_llvm_library(LLVMObjCARCOpts
|
||||||
ObjCARCContract.cpp
|
ObjCARCContract.cpp
|
||||||
DependencyAnalysis.cpp
|
DependencyAnalysis.cpp
|
||||||
ProvenanceAnalysis.cpp
|
ProvenanceAnalysis.cpp
|
||||||
|
ProvenanceAnalysisEvaluator.cpp
|
||||||
)
|
)
|
||||||
|
|
||||||
add_dependencies(LLVMObjCARCOpts intrinsics_gen)
|
add_dependencies(LLVMObjCARCOpts intrinsics_gen)
|
||||||
|
|
|
@ -380,11 +380,15 @@ static inline bool IsObjCIdentifiedObject(const Value *V) {
|
||||||
StringRef Name = GV->getName();
|
StringRef Name = GV->getName();
|
||||||
// These special variables are known to hold values which are not
|
// These special variables are known to hold values which are not
|
||||||
// reference-counted pointers.
|
// reference-counted pointers.
|
||||||
if (Name.startswith("\01L_OBJC_SELECTOR_REFERENCES_") ||
|
if (Name.startswith("\01l_objc_msgSend_fixup_"))
|
||||||
Name.startswith("\01L_OBJC_CLASSLIST_REFERENCES_") ||
|
return true;
|
||||||
Name.startswith("\01L_OBJC_CLASSLIST_SUP_REFS_$_") ||
|
|
||||||
Name.startswith("\01L_OBJC_METH_VAR_NAME_") ||
|
StringRef Section = GV->getSection();
|
||||||
Name.startswith("\01l_objc_msgSend_fixup_"))
|
if (Section.find("__message_refs") != StringRef::npos ||
|
||||||
|
Section.find("__objc_classrefs") != StringRef::npos ||
|
||||||
|
Section.find("__objc_superrefs") != StringRef::npos ||
|
||||||
|
Section.find("__objc_methname") != StringRef::npos ||
|
||||||
|
Section.find("__cstring") != StringRef::npos)
|
||||||
return true;
|
return true;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
|
@ -0,0 +1,92 @@
|
||||||
|
//===- ProvenanceAnalysisEvaluator.cpp - ObjC ARC Optimization ------------===//
|
||||||
|
//
|
||||||
|
// The LLVM Compiler Infrastructure
|
||||||
|
//
|
||||||
|
// This file is distributed under the University of Illinois Open Source
|
||||||
|
// License. See LICENSE.TXT for details.
|
||||||
|
//
|
||||||
|
//===----------------------------------------------------------------------===//
|
||||||
|
|
||||||
|
#include "ProvenanceAnalysis.h"
|
||||||
|
#include "llvm/Pass.h"
|
||||||
|
#include "llvm/ADT/SetVector.h"
|
||||||
|
#include "llvm/Analysis/AliasAnalysis.h"
|
||||||
|
#include "llvm/Analysis/Passes.h"
|
||||||
|
#include "llvm/IR/InstIterator.h"
|
||||||
|
#include "llvm/IR/Function.h"
|
||||||
|
#include "llvm/Support/raw_ostream.h"
|
||||||
|
|
||||||
|
using namespace llvm;
|
||||||
|
using namespace llvm::objcarc;
|
||||||
|
|
||||||
|
namespace {
|
||||||
|
class PAEval : public FunctionPass {
|
||||||
|
|
||||||
|
public:
|
||||||
|
static char ID;
|
||||||
|
PAEval();
|
||||||
|
void getAnalysisUsage(AnalysisUsage &AU) const override;
|
||||||
|
bool runOnFunction(Function &F) override;
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
char PAEval::ID = 0;
|
||||||
|
PAEval::PAEval() : FunctionPass(ID) {}
|
||||||
|
|
||||||
|
void PAEval::getAnalysisUsage(AnalysisUsage &AU) const {
|
||||||
|
AU.addRequired<AliasAnalysis>();
|
||||||
|
}
|
||||||
|
|
||||||
|
static StringRef getName(Value *V) {
|
||||||
|
StringRef Name = V->getName();
|
||||||
|
if (Name.startswith("\1"))
|
||||||
|
return Name.substr(1);
|
||||||
|
return Name;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void insertIfNamed(SetVector<Value *> &Values, Value *V) {
|
||||||
|
if (!V->hasName())
|
||||||
|
return;
|
||||||
|
Values.insert(V);
|
||||||
|
}
|
||||||
|
|
||||||
|
bool PAEval::runOnFunction(Function &F) {
|
||||||
|
SetVector<Value *> Values;
|
||||||
|
|
||||||
|
for (auto &Arg : F.args())
|
||||||
|
insertIfNamed(Values, &Arg);
|
||||||
|
|
||||||
|
for (auto I = inst_begin(F), E = inst_end(F); I != E; ++I) {
|
||||||
|
insertIfNamed(Values, &*I);
|
||||||
|
|
||||||
|
for (auto &Op : I->operands())
|
||||||
|
insertIfNamed(Values, Op);
|
||||||
|
}
|
||||||
|
|
||||||
|
ProvenanceAnalysis PA;
|
||||||
|
PA.setAA(&getAnalysis<AliasAnalysis>());
|
||||||
|
|
||||||
|
for (Value *V1 : Values) {
|
||||||
|
StringRef NameV1 = getName(V1);
|
||||||
|
for (Value *V2 : Values) {
|
||||||
|
StringRef NameV2 = getName(V2);
|
||||||
|
if (NameV1 >= NameV2)
|
||||||
|
continue;
|
||||||
|
errs() << NameV1 << " and " << NameV2;
|
||||||
|
if (PA.related(V1, V2))
|
||||||
|
errs() << " are related.\n";
|
||||||
|
else
|
||||||
|
errs() << " are not related.\n";
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
FunctionPass *llvm::createPAEvalPass() { return new PAEval(); }
|
||||||
|
|
||||||
|
INITIALIZE_PASS_BEGIN(PAEval, "pa-eval",
|
||||||
|
"Evaluate ProvenanceAnalysis on all pairs", false, true)
|
||||||
|
INITIALIZE_AG_DEPENDENCY(AliasAnalysis)
|
||||||
|
INITIALIZE_PASS_END(PAEval, "pa-eval",
|
||||||
|
"Evaluate ProvenanceAnalysis on all pairs", false, true)
|
|
@ -0,0 +1,52 @@
|
||||||
|
; RUN: opt -disable-output -pa-eval %s 2>&1 | FileCheck %s
|
||||||
|
|
||||||
|
@"\01l_objc_msgSend_fixup_" = global i8 0
|
||||||
|
@g1 = global i8 0, section "__OBJC,__message_refs,literal_pointers,no_dead_strip"
|
||||||
|
@g2 = global i8 0, section "__DATA, __objc_classrefs, regular, no_dead_strip"
|
||||||
|
@g3 = global i8 0, section "__DATA, __objc_superrefs, regular, no_dead_strip"
|
||||||
|
@g4 = global i8 0, section "__TEXT,__objc_methname,cstring_literals"
|
||||||
|
@g5 = global i8 0, section "__TEXT,__cstring,cstring_literals"
|
||||||
|
|
||||||
|
declare void @g(i8)
|
||||||
|
|
||||||
|
define void @f(i8* %a, i8** %b, i8** %c) {
|
||||||
|
%y1 = load i8* %a
|
||||||
|
call void @g(i8 %y1)
|
||||||
|
|
||||||
|
%y2 = load i8** %b
|
||||||
|
%y3 = load i8** %c
|
||||||
|
|
||||||
|
%x0 = load i8* @"\01l_objc_msgSend_fixup_"
|
||||||
|
call void @g(i8 %x0)
|
||||||
|
|
||||||
|
%x1 = load i8* @g1
|
||||||
|
call void @g(i8 %x1)
|
||||||
|
|
||||||
|
%x2 = load i8* @g2
|
||||||
|
call void @g(i8 %x2)
|
||||||
|
|
||||||
|
%x3 = load i8* @g3
|
||||||
|
call void @g(i8 %x3)
|
||||||
|
|
||||||
|
%x4 = load i8* @g4
|
||||||
|
call void @g(i8 %x4)
|
||||||
|
|
||||||
|
%x5 = load i8* @g5
|
||||||
|
call void @g(i8 %x5)
|
||||||
|
ret void
|
||||||
|
}
|
||||||
|
|
||||||
|
; CHECK: y1 and y2 are related.
|
||||||
|
; CHECK: y1 and y3 are related.
|
||||||
|
; CHECK: y2 and y3 are related.
|
||||||
|
; CHECK: x0 and y1 are not related.
|
||||||
|
; CHECK: x0 and y2 are not related.
|
||||||
|
; CHECK: x0 and y3 are not related.
|
||||||
|
; CHECK: l_objc_msgSend_fixup_ and y1 are not related.
|
||||||
|
; CHECK: l_objc_msgSend_fixup_ and y2 are not related.
|
||||||
|
; CHECK: l_objc_msgSend_fixup_ and y3 are not related.
|
||||||
|
; CHECK: x1 and y1 are not related.
|
||||||
|
; CHECK: x2 and y1 are not related.
|
||||||
|
; CHECK: x3 and y1 are not related.
|
||||||
|
; CHECK: x4 and y1 are not related.
|
||||||
|
; CHECK: x5 and y1 are not related.
|
Loading…
Reference in New Issue