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Implement global merge optimization for global variables.

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This commit implements two command line switches -global-merge-on-external
and -global-merge-aligned, and both of them are false by default, so this
optimization is disabled by default for all targets.

For ARM64, some back-end behaviors need to be tuned to get this optimization
further enabled.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208934 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jiangning Liu 2014-05-15 23:45:42 +00:00
parent 01a02d91dc
commit d5db8765d6
20 changed files with 448 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/llvm/IR/GlobalAlias.h
View File

@ -82,6 +82,10 @@ public:
static inline bool classof(const Value *V) {
return V->getValueID() == Value::GlobalAliasVal;
}
// return the constant offset of an expression, with which this global var
// has alias.
uint64_t calculateOffset(const DataLayout &DL) const;
};
template <>

7
include/llvm/Target/TargetLowering.h
View File

@ -32,6 +32,7 @@
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/Target/TargetCallingConv.h"
#include "llvm/Target/TargetMachine.h"
@ -883,6 +884,12 @@ public:
return 0;
}
/// Returns the alignment required by global merge on external symbols.
/// By default, returns the natural alignment of merged data structure.
virtual unsigned getGlobalMergeAlignment(StructType *MergedTy) const {
return getDataLayout()->getABITypeAlignment(MergedTy);
}
/// Returns true if a cast between SrcAS and DestAS is a noop.
virtual bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const {
return false;

7
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
View File

@ -946,8 +946,11 @@ bool AsmPrinter::doFinalization(Module &M) {
EmitVisibility(Name, Alias.getVisibility());
// Emit the directives as assignments aka .set:
OutStreamer.EmitAssignment(Name,
MCSymbolRefExpr::Create(Target, OutContext));
const MCExpr *Expr = MCSymbolRefExpr::Create(Target, OutContext);
if (uint64_t Offset = Alias.calculateOffset(*TM.getDataLayout()))
Expr = MCBinaryExpr::CreateAdd(Expr,
MCConstantExpr::Create(Offset, OutContext), OutContext);
OutStreamer.EmitAssignment(Name, Expr);
}
}

25
lib/IR/Globals.cpp
View File

@ -15,6 +15,7 @@
#include "llvm/IR/GlobalValue.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalVariable.h"
@ -282,3 +283,27 @@ GlobalObject *GlobalAlias::getAliasedGlobal() {
return cast<GlobalObject>(GV);
}
}
uint64_t GlobalAlias::calculateOffset(const DataLayout &DL) const {
uint64_t Offset = 0;
const Constant *C = this;
while (C) {
if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(C)) {
C = GA->getAliasee();
} else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
if (CE->getOpcode() == Instruction::GetElementPtr) {
std::vector<Value*> Args;
for (unsigned I = 1; I < CE->getNumOperands(); ++I)
Args.push_back(CE->getOperand(I));
Offset += DL.getIndexedOffset(CE->getOperand(0)->getType(), Args);
}
C = CE->getOperand(0);
} else if (isa<GlobalValue>(C)) {
return Offset;
} else {
assert(0 && "Unexpected type in alias chain!");
return 0;
}
}
return Offset;
}

14
lib/Target/AArch64/AArch64ISelLowering.cpp
View File

@ -5560,3 +5560,17 @@ unsigned AArch64TargetLowering::getMaximalGlobalOffset() const {
return 4095;
}
/// getGlobalMergeAlignment - Set alignment to be the max size of merged
/// global variable data structure, and make it aligned up to power of 2.
/// This way, we could guarantee the merged global variable data structure
/// doesn't cross page boundary, because usually OS always allocates page at
/// 4096-byte aligned boundary.
unsigned AArch64TargetLowering::getGlobalMergeAlignment(
StructType *MergedTy) const {
unsigned Align = getDataLayout()->getTypeAllocSize(MergedTy);
if (Align & (Align - 1))
Align = llvm::NextPowerOf2(Align);
return Align;
}

4
lib/Target/AArch64/AArch64ISelLowering.h
View File

@ -386,6 +386,10 @@ public:
/// be used for loads / stores from the global.
unsigned getMaximalGlobalOffset() const override;
/// getGlobalMergeAlignment - Set alignment to be the max size of merged
/// global variable data structure, and make it aligned up to power of 2.
unsigned getGlobalMergeAlignment(StructType *MergedTy) const override;
protected:
std::pair<const TargetRegisterClass*, uint8_t>
findRepresentativeClass(MVT VT) const override;

14
lib/Target/ARM64/ARM64ISelLowering.cpp
View File

@ -630,6 +630,20 @@ unsigned ARM64TargetLowering::getMaximalGlobalOffset() const {
return 4095;
}
/// getGlobalMergeAlignment - Set alignment to be the max size of merged
/// global variable data structure, and make it aligned up to power of 2.
/// This way, we could guarantee the merged global variable data structure
/// doesn't cross page boundary, because usually OS always allocates page at
/// 4096-byte aligned boundary.
unsigned ARM64TargetLowering::getGlobalMergeAlignment(
StructType *MergedTy) const {
unsigned Align = getDataLayout()->getTypeAllocSize(MergedTy);
if (Align & (Align - 1))
Align = llvm::NextPowerOf2(Align);
return Align;
}
FastISel *
ARM64TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo,
const TargetLibraryInfo *libInfo) const {

4
lib/Target/ARM64/ARM64ISelLowering.h
View File

@ -236,6 +236,10 @@ public:
/// be used for loads / stores from the global.
unsigned getMaximalGlobalOffset() const override;
/// getGlobalMergeAlignment - Set alignment to be the max size of merged
/// global variable data structure, and make it aligned up to power of 2.
unsigned getGlobalMergeAlignment(StructType *MergedTy) const override;
/// Returns true if a cast between SrcAS and DestAS is a noop.
bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
// Addrspacecasts are always noops.

85
lib/Transforms/Scalar/GlobalMerge.cpp
View File

@ -72,7 +72,7 @@ using namespace llvm;
#define DEBUG_TYPE "global-merge"
static cl::opt<bool>
EnableGlobalMerge("global-merge", cl::Hidden,
EnableGlobalMerge("enable-global-merge", cl::NotHidden,
cl::desc("Enable global merge pass"),
cl::init(true));
@ -81,6 +81,16 @@ EnableGlobalMergeOnConst("global-merge-on-const", cl::Hidden,
cl::desc("Enable global merge pass on constants"),
cl::init(false));
static cl::opt<bool>
EnableGlobalMergeOnExternal("global-merge-on-external", cl::Hidden,
cl::desc("Enable global merge pass on external linkage"),
cl::init(false));
static cl::opt<bool>
EnableGlobalMergeAligned("global-merge-aligned", cl::Hidden,
cl::desc("Set target specific alignment for global merge pass"),
cl::init(false));
STATISTIC(NumMerged , "Number of globals merged");
namespace {
class GlobalMerge : public FunctionPass {
@ -129,9 +139,21 @@ namespace {
} // end anonymous namespace
char GlobalMerge::ID = 0;
INITIALIZE_PASS(GlobalMerge, "global-merge",
"Global Merge", false, false)
static void *initializeGlobalMergePassOnce(PassRegistry &Registry) {
PassInfo *PI = new PassInfo(
"Merge global variables",
"global-merge", &GlobalMerge::ID,
PassInfo::NormalCtor_t(callDefaultCtor<GlobalMerge>), false,
false, PassInfo::TargetMachineCtor_t(
callTargetMachineCtor<GlobalMerge>));
Registry.registerPass(*PI, true);
return PI;
}
void llvm::initializeGlobalMergePass(PassRegistry &Registry) {
CALL_ONCE_INITIALIZATION(initializeGlobalMergePassOnce)
}
bool GlobalMerge::doMerge(SmallVectorImpl<GlobalVariable*> &Globals,
Module &M, bool isConst, unsigned AddrSpace) const {
@ -154,11 +176,16 @@ bool GlobalMerge::doMerge(SmallVectorImpl<GlobalVariable*> &Globals,
Type *Int32Ty = Type::getInt32Ty(M.getContext());
assert (Globals.size() > 1);
for (size_t i = 0, e = Globals.size(); i != e; ) {
size_t j = 0;
uint64_t MergedSize = 0;
std::vector<Type*> Tys;
std::vector<Constant*> Inits;
bool HasExternal = false;
GlobalVariable *TheFirstExternal = 0;
for (j = i; j != e; ++j) {
Type *Ty = Globals[j]->getType()->getElementType();
MergedSize += DL->getTypeAllocSize(Ty);
@ -167,17 +194,45 @@ bool GlobalMerge::doMerge(SmallVectorImpl<GlobalVariable*> &Globals,
}
Tys.push_back(Ty);
Inits.push_back(Globals[j]->getInitializer());
if (Globals[j]->hasExternalLinkage() && !HasExternal) {
HasExternal = true;
TheFirstExternal = Globals[j];
}
}
// If merged variables doesn't have external linkage, we needn't to expose
// the symbol after merging.
GlobalValue::LinkageTypes Linkage = HasExternal ?
GlobalValue::ExternalLinkage :
GlobalValue::InternalLinkage ;
// If merged variables have external linkage, we use symbol name of the
// first variable merged as the suffix of global symbol name. This would
// be able to avoid the link-time naming conflict for globalm symbols.
Twine MergedGVName = HasExternal ?
"_MergedGlobals_" + TheFirstExternal->getName() :
"_MergedGlobals" ;
StructType *MergedTy = StructType::get(M.getContext(), Tys);
Constant *MergedInit = ConstantStruct::get(MergedTy, Inits);
GlobalVariable *MergedGV = new GlobalVariable(M, MergedTy, isConst,
GlobalValue::InternalLinkage,
MergedInit, "_MergedGlobals",
nullptr,
GlobalVariable::NotThreadLocal,
AddrSpace);
Linkage, MergedInit, MergedGVName,
nullptr, GlobalVariable::NotThreadLocal,
AddrSpace);
if (EnableGlobalMergeAligned) {
unsigned Align = TLI->getGlobalMergeAlignment(MergedTy);
assert(((Align % DL->getABITypeAlignment(MergedTy)) == 0) &&
"Specified alignment doesn't meet natural alignment requirement.");
MergedGV->setAlignment(Align);
}
for (size_t k = i; k < j; ++k) {
GlobalValue::LinkageTypes Linkage = Globals[k]->getLinkage();
std::string Name = Globals[k]->getName();
Constant *Idx[2] = {
ConstantInt::get(Int32Ty, 0),
ConstantInt::get(Int32Ty, k-i)
@ -185,6 +240,12 @@ bool GlobalMerge::doMerge(SmallVectorImpl<GlobalVariable*> &Globals,
Constant *GEP = ConstantExpr::getInBoundsGetElementPtr(MergedGV, Idx);
Globals[k]->replaceAllUsesWith(GEP);
Globals[k]->eraseFromParent();
if (Linkage != GlobalValue::InternalLinkage) {
// Generate a new alias...
new GlobalAlias(GEP->getType(), Linkage, Name, GEP, &M);
}
NumMerged++;
}
i = j;
@ -245,8 +306,12 @@ bool GlobalMerge::doInitialization(Module &M) {
// Grab all non-const globals.
for (Module::global_iterator I = M.global_begin(),
E = M.global_end(); I != E; ++I) {
// Merge is safe for "normal" internal globals only
if (!I->hasLocalLinkage() || I->isThreadLocal() || I->hasSection())
// Merge is safe for "normal" internal or external globals only
if (I->isDeclaration() || I->isThreadLocal() || I->hasSection())
continue;
if (!(EnableGlobalMergeOnExternal && I->hasExternalLinkage())
&& !I->hasInternalLinkage())
continue;
PointerType *PT = dyn_cast<PointerType>(I->getType());

1
lib/Transforms/Scalar/Scalar.cpp
View File

@ -38,6 +38,7 @@ void llvm::initializeScalarOpts(PassRegistry &Registry) {
initializeDSEPass(Registry);
initializeGVNPass(Registry);
initializeEarlyCSEPass(Registry);
initializeGlobalMergePass(Registry);
initializeIndVarSimplifyPass(Registry);
initializeJumpThreadingPass(Registry);
initializeLICMPass(Registry);

34
test/CodeGen/AArch64/global-merge.ll Normal file
View File

@ -0,0 +1,34 @@
; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -O0 | FileCheck --check-prefix=NO-MERGE %s
; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -O0 -global-merge-on-external=true -global-merge-aligned=true | FileCheck --check-prefix=NO-MERGE %s
; RUN: llc < %s -mtriple=arm64-apple-ios -O0 | FileCheck %s --check-prefix=CHECK-APPLE-IOS-NO-MERGE
; RUN: llc < %s -mtriple=arm64-apple-ios -O0 -global-merge-on-external=true -global-merge-aligned=false | FileCheck %s --check-prefix=CHECK-APPLE-IOS-NO-MERGE
; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -O1 | FileCheck %s
; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -O1 -global-merge-on-external=true -global-merge-aligned=true | FileCheck %s
; RUN: llc < %s -mtriple=arm64-apple-ios -O1 | FileCheck %s --check-prefix=CHECK-APPLE-IOS
; RUN: llc < %s -mtriple=arm64-apple-ios -O1 -global-merge-on-external=true -global-merge-aligned=false | FileCheck %s --check-prefix=CHECK-APPLE-IOS
@m = internal global i32 0, align 4
@n = internal global i32 0, align 4
define void @f1(i32 %a1, i32 %a2) {
; CHECK-LABEL: f1:
; CHECK: adrp x{{[0-9]+}}, _MergedGlobals
; CHECK-NOT: adrp
; CHECK-APPLE-IOS-LABEL: f1:
; CHECK-APPLE-IOS: adrp x{{[0-9]+}}, __MergedGlobals
; CHECK-APPLE-IOS-NOT: adrp
store i32 %a1, i32* @m, align 4
store i32 %a2, i32* @n, align 4
ret void
}
; CHECK: .local _MergedGlobals
; CHECK: .comm _MergedGlobals,8,8
; NO-MERGE-NOT: .local _MergedGlobals
; CHECK-APPLE-IOS: .zerofill __DATA,__bss,__MergedGlobals,8,3
; CHECK-APPLE-IOS-NO-MERGE-NOT: .zerofill __DATA,__bss,__MergedGlobals,8,3

17
test/CodeGen/AArch64/global_merge_1.ll
View File

@ -1,17 +0,0 @@
; RUN: llc < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s
@m = internal global i32 0, align 4
@n = internal global i32 0, align 4
define void @f1(i32 %a1, i32 %a2) {
; CHECK-LABEL: f1:
; CHECK: adrp x{{[0-9]+}}, _MergedGlobals
; CHECK-NOT: adrp
store i32 %a1, i32* @m, align 4
store i32 %a2, i32* @n, align 4
ret void
}
; CHECK: .local _MergedGlobals
; CHECK: .comm _MergedGlobals,8,8

85
test/CodeGen/ARM/global-merge-1.ll Normal file
View File

@ -0,0 +1,85 @@
; RUN: llc %s -O0 -o - | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O0 -o - -enable-global-merge=false | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O0 -o - -enable-global-merge=true | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O1 -o - | FileCheck -check-prefix=MERGE %s
; RUN: llc %s -O1 -o - -enable-global-merge=false | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O1 -o - -enable-global-merge=true | FileCheck -check-prefix=MERGE %s
; MERGE-NOT: .zerofill __DATA,__bss,_bar,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_baz,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_foo,20,2
; MERGE: .zerofill __DATA,__bss,__MergedGlobals,60,4
; MERGE-NOT: .zerofill __DATA,__bss,_bar,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_baz,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_foo,20,2
; NO-MERGE-NOT: .zerofill __DATA,__bss,__MergedGlobals,60,4
; NO-MERGE: .zerofill __DATA,__bss,_bar,20,2
; NO-MERGE: .zerofill __DATA,__bss,_baz,20,2
; NO-MERGE: .zerofill __DATA,__bss,_foo,20,2
; NO-MERGE-NOT: .zerofill __DATA,__bss,__MergedGlobals,60,4
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n32-S32"
target triple = "thumbv7-apple-ios3.0.0"
@bar = internal global [5 x i32] zeroinitializer, align 4
@baz = internal global [5 x i32] zeroinitializer, align 4
@foo = internal global [5 x i32] zeroinitializer, align 4
; Function Attrs: nounwind ssp
define internal void @initialize() #0 {
%1 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #3
store i32 %1, i32* getelementptr inbounds ([5 x i32]* @bar, i32 0, i32 0), align 4, !tbaa !1
%2 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #3
store i32 %2, i32* getelementptr inbounds ([5 x i32]* @baz, i32 0, i32 0), align 4, !tbaa !1
%3 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #3
store i32 %3, i32* getelementptr inbounds ([5 x i32]* @bar, i32 0, i32 1), align 4, !tbaa !1
%4 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #3
store i32 %4, i32* getelementptr inbounds ([5 x i32]* @baz, i32 0, i32 1), align 4, !tbaa !1
%5 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #3
store i32 %5, i32* getelementptr inbounds ([5 x i32]* @bar, i32 0, i32 2), align 4, !tbaa !1
%6 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #3
store i32 %6, i32* getelementptr inbounds ([5 x i32]* @baz, i32 0, i32 2), align 4, !tbaa !1
%7 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #3
store i32 %7, i32* getelementptr inbounds ([5 x i32]* @bar, i32 0, i32 3), align 4, !tbaa !1
%8 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #3
store i32 %8, i32* getelementptr inbounds ([5 x i32]* @baz, i32 0, i32 3), align 4, !tbaa !1
%9 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #3
store i32 %9, i32* getelementptr inbounds ([5 x i32]* @bar, i32 0, i32 4), align 4, !tbaa !1
%10 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #3
store i32 %10, i32* getelementptr inbounds ([5 x i32]* @baz, i32 0, i32 4), align 4, !tbaa !1
ret void
}
declare i32 @calc(...) #1
; Function Attrs: nounwind ssp
define internal void @calculate() #0 {
%1 = load <4 x i32>* bitcast ([5 x i32]* @bar to <4 x i32>*), align 4
%2 = load <4 x i32>* bitcast ([5 x i32]* @baz to <4 x i32>*), align 4
%3 = mul <4 x i32> %2, %1
store <4 x i32> %3, <4 x i32>* bitcast ([5 x i32]* @foo to <4 x i32>*), align 4
%4 = load i32* getelementptr inbounds ([5 x i32]* @bar, i32 0, i32 4), align 4, !tbaa !1
%5 = load i32* getelementptr inbounds ([5 x i32]* @baz, i32 0, i32 4), align 4, !tbaa !1
%6 = mul nsw i32 %5, %4
store i32 %6, i32* getelementptr inbounds ([5 x i32]* @foo, i32 0, i32 4), align 4, !tbaa !1
ret void
}
; Function Attrs: nounwind readnone ssp
define internal i32* @returnFoo() #2 {
ret i32* getelementptr inbounds ([5 x i32]* @foo, i32 0, i32 0)
}
attributes #0 = { nounwind ssp "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind readnone ssp "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #3 = { nounwind }
!llvm.ident = !{!0}
!0 = metadata !{metadata !"LLVM version 3.4 "}
!1 = metadata !{metadata !2, metadata !2, i64 0}
!2 = metadata !{metadata !"int", metadata !3, i64 0}
!3 = metadata !{metadata !"omnipotent char", metadata !4, i64 0}
!4 = metadata !{metadata !"Simple C/C++ TBAA"}

88
test/CodeGen/ARM64/global-merge.ll Normal file
View File

@ -0,0 +1,88 @@
; RUN: llc %s -O0 -o - | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O0 -o - -enable-global-merge=false | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O0 -o - -enable-global-merge=true | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O1 -o - | FileCheck -check-prefix=MERGE %s
; RUN: llc %s -O1 -o - -enable-global-merge=false | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O1 -o - -enable-global-merge=true | FileCheck -check-prefix=MERGE %s
; MERGE-NOT: .zerofill __DATA,__bss,_bar,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_baz,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_foo,20,2
; MERGE: .zerofill __DATA,__bss,__MergedGlobals,60,4
; MERGE-NOT: .zerofill __DATA,__bss,_bar,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_baz,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_foo,20,2
; NO-MERGE-NOT: .zerofill __DATA,__bss,__MergedGlobals,60,4
; NO-MERGE: .zerofill __DATA,__bss,_bar,20,2
; NO-MERGE: .zerofill __DATA,__bss,_baz,20,2
; NO-MERGE: .zerofill __DATA,__bss,_foo,20,2
; NO-MERGE-NOT: .zerofill __DATA,__bss,__MergedGlobals,60,4
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32:64-S128"
target triple = "arm64-apple-ios7.0.0"
@bar = internal global [5 x i32] zeroinitializer, align 4
@baz = internal global [5 x i32] zeroinitializer, align 4
@foo = internal global [5 x i32] zeroinitializer, align 4
; Function Attrs: nounwind ssp
define internal void @initialize() #0 {
%1 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #2
store i32 %1, i32* getelementptr inbounds ([5 x i32]* @bar, i64 0, i64 0), align 4
%2 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #2
store i32 %2, i32* getelementptr inbounds ([5 x i32]* @baz, i64 0, i64 0), align 4
%3 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #2
store i32 %3, i32* getelementptr inbounds ([5 x i32]* @bar, i64 0, i64 1), align 4
%4 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #2
store i32 %4, i32* getelementptr inbounds ([5 x i32]* @baz, i64 0, i64 1), align 4
%5 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #2
store i32 %5, i32* getelementptr inbounds ([5 x i32]* @bar, i64 0, i64 2), align 4
%6 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #2
store i32 %6, i32* getelementptr inbounds ([5 x i32]* @baz, i64 0, i64 2), align 4
%7 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #2
store i32 %7, i32* getelementptr inbounds ([5 x i32]* @bar, i64 0, i64 3), align 4
%8 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #2
store i32 %8, i32* getelementptr inbounds ([5 x i32]* @baz, i64 0, i64 3), align 4
%9 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #2
store i32 %9, i32* getelementptr inbounds ([5 x i32]* @bar, i64 0, i64 4), align 4
%10 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #2
store i32 %10, i32* getelementptr inbounds ([5 x i32]* @baz, i64 0, i64 4), align 4
ret void
}
declare i32 @calc(...)
; Function Attrs: nounwind ssp
define internal void @calculate() #0 {
%1 = load i32* getelementptr inbounds ([5 x i32]* @bar, i64 0, i64 0), align 4
%2 = load i32* getelementptr inbounds ([5 x i32]* @baz, i64 0, i64 0), align 4
%3 = mul nsw i32 %2, %1
store i32 %3, i32* getelementptr inbounds ([5 x i32]* @foo, i64 0, i64 0), align 4
%4 = load i32* getelementptr inbounds ([5 x i32]* @bar, i64 0, i64 1), align 4
%5 = load i32* getelementptr inbounds ([5 x i32]* @baz, i64 0, i64 1), align 4
%6 = mul nsw i32 %5, %4
store i32 %6, i32* getelementptr inbounds ([5 x i32]* @foo, i64 0, i64 1), align 4
%7 = load i32* getelementptr inbounds ([5 x i32]* @bar, i64 0, i64 2), align 4
%8 = load i32* getelementptr inbounds ([5 x i32]* @baz, i64 0, i64 2), align 4
%9 = mul nsw i32 %8, %7
store i32 %9, i32* getelementptr inbounds ([5 x i32]* @foo, i64 0, i64 2), align 4
%10 = load i32* getelementptr inbounds ([5 x i32]* @bar, i64 0, i64 3), align 4
%11 = load i32* getelementptr inbounds ([5 x i32]* @baz, i64 0, i64 3), align 4
%12 = mul nsw i32 %11, %10
store i32 %12, i32* getelementptr inbounds ([5 x i32]* @foo, i64 0, i64 3), align 4
%13 = load i32* getelementptr inbounds ([5 x i32]* @bar, i64 0, i64 4), align 4
%14 = load i32* getelementptr inbounds ([5 x i32]* @baz, i64 0, i64 4), align 4
%15 = mul nsw i32 %14, %13
store i32 %15, i32* getelementptr inbounds ([5 x i32]* @foo, i64 0, i64 4), align 4
ret void
}
; Function Attrs: nounwind readnone ssp
define internal i32* @returnFoo() #1 {
ret i32* getelementptr inbounds ([5 x i32]* @foo, i64 0, i64 0)
}
attributes #0 = { nounwind ssp }
attributes #1 = { nounwind readnone ssp }
attributes #2 = { nounwind }

22
test/Transforms/GlobalMerge/AArch64/global-merge-1.ll Normal file
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@ -0,0 +1,22 @@
; RUN: opt %s -mtriple=aarch64-none-linux-gnu -global-merge -S -o - | FileCheck %s
; RUN: opt %s -mtriple=aarch64-none-linux-gnu -global-merge -global-merge-on-external -global-merge-aligned -S -o - | FileCheck %s
; RUN: opt %s -mtriple=arm64-linux-gnuabi -global-merge -S -o - | FileCheck %s
; RUN: opt %s -mtriple=arm64-linux-gnuabi -global-merge -global-merge-on-external -global-merge-aligned -S -o - | FileCheck %s
; RUN: opt %s -mtriple=arm64-apple-ios -global-merge -S -o - | FileCheck %s
; RUN: opt %s -mtriple=arm64-apple-ios -global-merge -global-merge-on-external -global-merge-aligned -S -o - | FileCheck %s
@m = internal global i32 0, align 4
@n = internal global i32 0, align 4
; CHECK: @_MergedGlobals = internal global { i32, i32 } zeroinitializer
define void @f1(i32 %a1, i32 %a2) {
; CHECK-LABEL: @f1
; CHECK: getelementptr inbounds ({ i32, i32 }* @_MergedGlobals, i32 0, i32 0)
; CHECK: getelementptr inbounds ({ i32, i32 }* @_MergedGlobals, i32 0, i32 1)
store i32 %a1, i32* @m, align 4
store i32 %a2, i32* @n, align 4
ret void
}

30
test/Transforms/GlobalMerge/AArch64/global-merge-2.ll Normal file
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@ -0,0 +1,30 @@
; RUN: opt %s -mtriple=aarch64-none-linux-gnu -global-merge -global-merge-on-external -global-merge-aligned -S -o - | FileCheck %s
; RUN: opt %s -mtriple=arm64-linux-gnuabi -global-merge -global-merge-on-external -global-merge-aligned -S -o - | FileCheck %s
; RUN: opt %s -mtriple=arm64-apple-ios -global-merge -global-merge-on-external -global-merge-aligned -S -o - | FileCheck %s
@x = global i32 0, align 4
@y = global i32 0, align 4
@z = global i32 0, align 4
; CHECK: @_MergedGlobals_x = global { i32, i32, i32 } zeroinitializer, align 16
; CHECK: @x = alias getelementptr inbounds ({ i32, i32, i32 }* @_MergedGlobals_x, i32 0, i32 0)
; CHECK: @y = alias getelementptr inbounds ({ i32, i32, i32 }* @_MergedGlobals_x, i32 0, i32 1)
; CHECK: @z = alias getelementptr inbounds ({ i32, i32, i32 }* @_MergedGlobals_x, i32 0, i32 2)
define void @f1(i32 %a1, i32 %a2) {
; CHECK-LABEL: @f1
; CHECK: getelementptr inbounds ({ i32, i32, i32 }* @_MergedGlobals_x, i32 0, i32 0)
; CHECK: getelementptr inbounds ({ i32, i32, i32 }* @_MergedGlobals_x, i32 0, i32 1)
store i32 %a1, i32* @x, align 4
store i32 %a2, i32* @y, align 4
ret void
}
define void @g1(i32 %a1, i32 %a2) {
; CHECK-LABEL: @g1
; CHECK: getelementptr inbounds ({ i32, i32, i32 }* @_MergedGlobals_x, i32 0, i32 1)
; CHECK: getelementptr inbounds ({ i32, i32, i32 }* @_MergedGlobals_x, i32 0, i32 2)
store i32 %a1, i32* @y, align 4
store i32 %a2, i32* @z, align 4
ret void
}

27
test/Transforms/GlobalMerge/AArch64/global-merge-3.ll Normal file
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@ -0,0 +1,27 @@
; RUN: opt %s -mtriple=aarch64-none-linux-gnu -global-merge -global-merge-on-external -global-merge-aligned -S -o - | FileCheck %s
; RUN: opt %s -mtriple=arm64-linux-gnuabi -global-merge -global-merge-on-external -global-merge-aligned -S -o - | FileCheck %s
; RUN: opt %s -mtriple=arm64-apple-ios -global-merge -global-merge-on-external -global-merge-aligned -S -o - | FileCheck %s
@x = global [1000 x i32] zeroinitializer, align 1
@y = global [1000 x i32] zeroinitializer, align 1
@z = internal global i32 1, align 4
; CHECK: @_MergedGlobals_x = global { i32, [1000 x i32] } { i32 1, [1000 x i32] zeroinitializer }, align 4096
; CHECK: @_MergedGlobals_y = global { [1000 x i32] } zeroinitializer, align 4096
; CHECK: @x = alias getelementptr inbounds ({ i32, [1000 x i32] }* @_MergedGlobals_x, i32 0, i32 1)
; CHECK: @y = alias getelementptr inbounds ({ [1000 x i32] }* @_MergedGlobals_y, i32 0, i32 0)
define void @f1(i32 %a1, i32 %a2, i32 %a3) {
; CHECK-LABEL: @f1
; CHECK: %x3 = getelementptr inbounds [1000 x i32]* getelementptr inbounds ({ i32, [1000 x i32] }* @_MergedGlobals_x, i32 0, i32 1), i32 0, i64 3
; CHECK: %y3 = getelementptr inbounds [1000 x i32]* getelementptr inbounds ({ [1000 x i32] }* @_MergedGlobals_y, i32 0, i32 0), i32 0, i64 3
; CHECK: store i32 %a3, i32* getelementptr inbounds ({ i32, [1000 x i32] }* @_MergedGlobals_x, i32 0, i32 0), align 4
%x3 = getelementptr inbounds [1000 x i32]* @x, i32 0, i64 3
%y3 = getelementptr inbounds [1000 x i32]* @y, i32 0, i64 3
store i32 %a1, i32* %x3, align 4
store i32 %a2, i32* %y3, align 4
store i32 %a3, i32* @z, align 4
ret void
}

4
test/Transforms/GlobalMerge/AArch64/lit.local.cfg Normal file
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@ -0,0 +1,4 @@
targets = set(config.root.targets_to_build.split())
if not 'AArch64' in targets:
config.unsupported = True

23
test/Transforms/GlobalMerge/ARM/arm.ll
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@ -1,23 +1,4 @@
; RUN: llc %s -O0 -o - | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O0 -o - -global-merge=false | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O0 -o - -global-merge=true | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O1 -o - | FileCheck -check-prefix=MERGE %s
; RUN: llc %s -O1 -o - -global-merge=false | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O1 -o - -global-merge=true | FileCheck -check-prefix=MERGE %s
; MERGE-NOT: .zerofill __DATA,__bss,_bar,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_baz,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_foo,20,2
; MERGE: .zerofill __DATA,__bss,__MergedGlobals,60,4
; MERGE-NOT: .zerofill __DATA,__bss,_bar,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_baz,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_foo,20,2
; NO-MERGE-NOT: .zerofill __DATA,__bss,__MergedGlobals,60,4
; NO-MERGE: .zerofill __DATA,__bss,_bar,20,2
; NO-MERGE: .zerofill __DATA,__bss,_baz,20,2
; NO-MERGE: .zerofill __DATA,__bss,_foo,20,2
; NO-MERGE-NOT: .zerofill __DATA,__bss,__MergedGlobals,60,4
; RUN: opt %s -mtriple=arm-linux-gnuabi -global-merge -S -o - | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n32-S32"
target triple = "thumbv7-apple-ios3.0.0"
@ -26,6 +7,8 @@ target triple = "thumbv7-apple-ios3.0.0"
@baz = internal global [5 x i32] zeroinitializer, align 4
@foo = internal global [5 x i32] zeroinitializer, align 4
; CHECK: @_MergedGlobals = internal global { [5 x i32], [5 x i32], [5 x i32] } zeroinitializer
; Function Attrs: nounwind ssp
define internal void @initialize() #0 {
%1 = tail call i32 bitcast (i32 (...)* @calc to i32 ()*)() #3

21
test/Transforms/GlobalMerge/ARM64/arm64.ll
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@ -1,23 +1,6 @@
; RUN: llc %s -O0 -o - | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O0 -o - -global-merge=false | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O0 -o - -global-merge=true | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O1 -o - | FileCheck -check-prefix=MERGE %s
; RUN: llc %s -O1 -o - -global-merge=false | FileCheck -check-prefix=NO-MERGE %s
; RUN: llc %s -O1 -o - -global-merge=true | FileCheck -check-prefix=MERGE %s
; RUN: opt %s -mtriple=arm64-linux-gnuabi -global-merge -S -o - | FileCheck %s
; MERGE-NOT: .zerofill __DATA,__bss,_bar,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_baz,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_foo,20,2
; MERGE: .zerofill __DATA,__bss,__MergedGlobals,60,4
; MERGE-NOT: .zerofill __DATA,__bss,_bar,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_baz,20,2
; MERGE-NOT: .zerofill __DATA,__bss,_foo,20,2
; NO-MERGE-NOT: .zerofill __DATA,__bss,__MergedGlobals,60,4
; NO-MERGE: .zerofill __DATA,__bss,_bar,20,2
; NO-MERGE: .zerofill __DATA,__bss,_baz,20,2
; NO-MERGE: .zerofill __DATA,__bss,_foo,20,2
; NO-MERGE-NOT: .zerofill __DATA,__bss,__MergedGlobals,60,4
; CHECK: @_MergedGlobals = internal global { [5 x i32], [5 x i32], [5 x i32] } zeroinitializer
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32:64-S128"
target triple = "arm64-apple-ios7.0.0"