第一种方法是将字符串转换成对应的整型数组
namespace
{
struct Str2Array : public ModulePass
{
static char ID; // Pass identification, replacement for typeid
Str2Array() : ModulePass(ID)
{
func__Enc_dec = NULL;
llvm_memcpy_p0i8_p0i8_i32 = NULL;
IsWChar = false;
}
// run -
bool runOnModule(Module &M) override;
void print(raw_ostream &O, const Module* = nullptr) const override { }
bool IsCString(GlobalVariable* GV);
bool IsASCString(GlobalVariable* GV);
bool IsUnicodeString(GlobalVariable* GV);
// getAnalysisUsage - This pass requires the CallGraph.
void getAnalysisUsage(AnalysisUsage &AU) const override {}
void ProcessGVStringSubstitute(GlobalVariable* GV);
void RemoveOrigGVString();
protected:
Function* func__Enc_dec;
Function* llvm_memcpy_p0i8_p0i8_i32;
bool IsWChar;
vector<GlobalVariable*> DeleteGlobalVar;
};
}
void Str2Array::RemoveOrigGVString()
{
int nSize = DeleteGlobalVar.size();
for (int i = 0; i < nSize; i++)
if(DeleteGlobalVar[i]->getNumUses() == 0)
DeleteGlobalVar[i]->eraseFromParent();
}
//替换字符串
void Str2Array::ProcessGVStringSubstitute(GlobalVariable* GV)
{
if (ConstantDataSequential * CDS = dyn_cast<ConstantDataSequential>(GV->getInitializer()))
{
GV->dump(); // 打印出来，看看结果
StringRef RawData = CDS->getRawDataValues();
int EltNum;
EltNum = CDS->getNumElements();
int length;
if(IsWChar)
length = EltNum * sizeof(WORD);
else
length = EltNum * sizeof(BYTE);
int NewArraySize = length / 4;
int offset = length % 4;
if (offset) NewArraySize++;
ArrayType* NewArrayTy = ArrayType::get(IntegerType::get(GV->getContext(), 32), NewArraySize);
vector<unsigned int> NewArrayValue;
int i = 0;
const char* p = RawData.data();
for (i = 0; i < NewArraySize;i++)
{
unsigned int tmp = *(unsigned int*)(&p[4 * i]);
NewArrayValue.push_back(tmp);
}
NewArrayValue[i - 1] &= ((1 << offset * 8) - 1);
while (!GV->use_empty())
{
User* tmpUser = GV->user_back();
if (Instruction* TargetInst = dyn_cast<Instruction>(tmpUser)) //在这条指令前插入我们的开辟堆栈和赋值的语句
{
if(TargetInst->getOpcode() != Instruction::GetElementPtr)
{
errs() << "This TargetInst is not a GetElementPtr Inst" << "\n";
continue;
}
AllocaInst* AllocArray = new AllocaInst(NewArrayTy, "New Array", TargetInst);
for (i = 0; i < NewArraySize; i++)
{
ConstantInt* const_int0 = ConstantInt::get(GV->getContext(), APInt(32, StringRef("0"), 10));
ConstantInt* const_int_i = ConstantInt::get(IntegerType::getInt32Ty(GV->getContext()), i);
ConstantInt* const_ArrayValue = ConstantInt::get(IntegerType::getInt32Ty(GV->getContext()), NewArrayValue[i]);
GetElementPtrInst* ptr_arrayidx = GetElementPtrInst::Create(NewArrayTy, AllocArray, { const_int0,const_int_i }, "arrayidx_" + Twine(i), TargetInst);
StoreInst* store2stack = new StoreInst(const_ArrayValue, ptr_arrayidx, false, TargetInst);
}
CastInst* Cast2int8_16ptr = nullptr;
if(IsWChar)
//Cast2int8_16ptr = new BitCastInst(AllocArray, PointerType::get(IntegerType::getInt16Ty(GV->getContext()), 0), "cast2WChar*", TargetInst);
Cast2int8_16ptr = new BitCastInst(AllocArray, GV->getType(), "cast2WChar*", TargetInst);
else
//Cast2int8_16ptr = new BitCastInst(AllocArray, PointerType::get(IntegerType::getInt8Ty(GV->getContext()), 0), "cast2Char*", TargetInst);
Cast2int8_16ptr = new BitCastInst(AllocArray, GV->getType(), "cast2Char*", TargetInst);
TargetInst->replaceUsesOfWith(GV, Cast2int8_16ptr);
}
else if(ConstantExpr* CExpr = dyn_cast<ConstantExpr>(tmpUser))
{
if(CExpr->getOpcode() != Instruction::GetElementPtr)
{
errs() << "The Constant is not a GetElementPtr" << "\n";
CExpr->dump();
continue;
}
while (!CExpr->user_empty())
{
User* CExpUser = CExpr->user_back();
if (Instruction* inst = dyn_cast<Instruction>(CExpUser))
{
AllocaInst* AllocArray = new AllocaInst(NewArrayTy, "New Array", inst);
for (i = 0; i < NewArraySize; i++)
{
ConstantInt* const_int0 = ConstantInt::get(GV->getContext(), APInt(32, StringRef("0"), 10));
ConstantInt* const_int_i = ConstantInt::get(IntegerType::getInt32Ty(GV->getContext()), i);
ConstantInt* const_ArrayValue = ConstantInt::get(IntegerType::getInt32Ty(GV->getContext()), NewArrayValue[i]);
GetElementPtrInst* ptr_arrayidx = GetElementPtrInst::Create(NewArrayTy, AllocArray, { const_int0,const_int_i }, "arrayidx_" + Twine(i), inst);
StoreInst* store2stack = new StoreInst(const_ArrayValue, ptr_arrayidx, false, inst);
}
CastInst* Cast2int8_16ptr = nullptr;
if (IsWChar)
Cast2int8_16ptr = new BitCastInst(AllocArray, GV->getType(), "cast2WChar*", inst);
else
Cast2int8_16ptr = new BitCastInst(AllocArray, GV->getType(), "cast2Char*", inst);
vector<Value*> ptr_index_struct;
ArrayRef<Value*> tmpArrayRef = makeArrayRef(ptr_index_struct);
for (int j = 1;j < CExpr->getNumOperands();j++)
{
ptr_index_struct.push_back(CExpr->getOperand(j));
}
tmpArrayRef = makeArrayRef(ptr_index_struct);
//验证类型
GV->getValueType()->dump();
cast<PointerType>(Cast2int8_16ptr->getType()->getScalarType())->getElementType()->dump();
GetElementPtrInst* GetNewAddr = GetElementPtrInst::Create(GV->getValueType(), Cast2int8_16ptr, tmpArrayRef, "Fake_constatnExpr", inst);
inst->replaceUsesOfWith(CExpr, GetNewAddr);
}
else
{
errs() << "The CExprUser is not a Inst" << "\n";
errs() << *CExpUser << "\n";
}
}
//替换完所有的常量表达式后，删除此常量
if(CExpr->getNumUses() == 0)
CExpr->destroyConstant();
}
else
{
errs() << "This User is not a Inst or ConstantExpr"<< "\n";
errs() << *tmpUser<< "\n";
}
}
}
if (GV->use_empty())
{
DeleteGlobalVar.push_back(GV); //先保存起来，处理后再删除
}
else
{
errs() << "there are still some users using the GV " << *GV << "\n";
for (Value::user_iterator useri = GV->user_begin(), usere = GV->user_end(); useri != usere; useri++)
{
useri->dump();
}
}
}
bool Str2Array::IsCString(GlobalVariable* GV)
{
if(IsASCString(GV))
{
IsWChar = false;
return true;
}
else if (IsUnicodeString(GV))
{
IsWChar = true;
return true;
}
return false;
}
bool Str2Array::IsASCString(GlobalVariable* GV)
{
if(GV->hasDefinitiveInitializer())
{
if(ConstantDataSequential * CDS = dyn_cast<ConstantDataSequential>(GV->getInitializer()))
{
if (CDS->isCString()) return true;
}
}
return false;
}
bool Str2Array::IsUnicodeString(GlobalVariable* GV)
{
if(GV->hasDefinitiveInitializer())
{
if(ConstantDataSequential* CDS = dyn_cast<ConstantDataSequential>(GV->getInitializer()))
{
if(CDS->getElementType() == IntegerType::getInt16Ty(GV->getContext()))
{
StringRef RawData = CDS->getRawDataValues();
int EltNum = CDS->getNumElements();
int length = EltNum * sizeof(WORD);
//errs() << RawData << "\n"; //这个在测试时输出的是宽字符的apple
if (RawData[length - 1] == 0 && RawData[length - 2] == 0)//简易的判断是否为Unicode字符串
{
for (int i = 0; i < length - 2 - 1;i++)
{
if (RawData[i] == 0 && RawData[i + 1] == 0) return false;
}
//如果字符串内只有最后的两个元素为0x00，那么基本可以判定它是一个unicode字符串
return true;
}
}
}
}
return false;
}
bool Str2Array::runOnModule(Module &M)
{
Module* mod = &M;
//遍历全局变量，找字符串类型的
for (Module::global_iterator gi = mod->global_begin();gi != mod->global_end();gi++)
{
GlobalVariable* g_value = (GlobalVariable*)gi;
//只处理本地全局变量和局部变量 static 和 private 、linkOnceODR
//增加LinkOnceODR这种类型，此类型出现比较多，一般都是用在字符串复制上
if (!(g_value->hasLocalLinkage() || g_value->hasLinkOnceODRLinkage()))
{
continue;
}
if (IsCString(g_value))
{
ProcessGVStringSubstitute(g_value);
}
}
RemoveOrigGVString();
return true;
}
char Str2Array::ID = 0;
static RegisterPass<Str2Array> X("str2array", "change string to char array");
Pass* llvm::createStr2Array()
{
return new Str2Array();
};
Pass* llvm::createStr2Array(bool flag)
{
if (flag != false) return new Str2Array();
return nullptr;
};测试源码为
#include <stdio.h>
int global_a = 11;
int global_b = 13;
int sub(int a, int b);
int sum(int a, int b);
int main()
{
int a;
int b;
int choice;
printf("pls input your choice, 1 for add, 2 for sub, 0 for end \n");
while (1)
{
scanf_s("%d", &choice);
switch (choice)
{
case 0:
goto end;
case 1:
{
a = sum(global_a, global_b);
printf("global_a + global_b =%d\n", a);
break;
}
case 2:
{
b = sub(global_a, global_b);
printf("global_a - global_b =%d\n", b);
break;
}
default:printf("no correct choice,pls input the right one\n"); break;
}
}
end:
printf("----the end------");
return 0;
}
int sub(int a, int b)
{
return a - b;
}
int sum(int a, int b)
{
return a + b;
}编译成中间文件（ll）
@"\01?global_a@@3HA" = global i32 11, align 4
@"\01?global_b@@3HA" = global i32 13, align 4
@"\01??_C@_0DJ@FGCLOFBN@pls?5input?5your?5choice?0?51?5for?5add@" = linkonce_odr unnamed_addr constant [57 x i8] c"pls input your choice, 1 for add, 2 for sub, 0 for end \0A\00", comdat, align 1
@"\01??_C@_02DPKJAMEF@?$CFd?$AA@" = linkonce_odr unnamed_addr constant [3 x i8] c"%d\00", comdat, align 1
@"\01??_C@_0BJ@BEHJBLCA@global_a?5?$CL?5global_b?5?$DN?$CFd?6?$AA@" = linkonce_odr unnamed_addr constant [25 x i8] c"global_a + global_b =%d\0A\00", comdat, align 1
@"\01??_C@_0BJ@EHOIHCME@global_a?5?9?5global_b?5?$DN?$CFd?6?$AA@" = linkonce_odr unnamed_addr constant [25 x i8] c"global_a - global_b =%d\0A\00", comdat, align 1
@"\01??_C@_0CL@EEHIEKFJ@no?5correct?5choice?0pls?5input?5the?5@" = linkonce_odr unnamed_addr constant [43 x i8] c"no correct choice,pls input the right one\0A\00", comdat, align 1
@"\01??_C@_0BC@GINEGEGI@?9?9?9?9the?5end?9?9?9?9?9?9?$AA@" = linkonce_odr unnamed_addr constant [18 x i8] c"----the end------\00", comdat, align 1
; Function Attrs: norecurse nounwind
define i32 @main() #0 {
entry:
%retval = alloca i32, align 4
%a = alloca i32, align 4
%b = alloca i32, align 4
%choice = alloca i32, align 4
store i32 0, i32* %retval, align 4
%call = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([57 x i8], [57 x i8]* @"\01??_C@_0DJ@FGCLOFBN@pls?5input?5your?5choice?0?51?5for?5add@", i32 0, i32 0))
br label %while.body
while.body: ; preds = %entry, %sw.epilog
%call1 = call i32 (i8*, ...) @scanf_s(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @"\01??_C@_02DPKJAMEF@?$CFd?$AA@", i32 0, i32 0), i32* %choice)
%0 = load i32, i32* %choice, align 4
switch i32 %0, label %sw.default [
i32 0, label %sw.bb
i32 1, label %sw.bb2
i32 2, label %sw.bb5
]
sw.bb: ; preds = %while.body
br label %end
sw.bb2: ; preds = %while.body
%1 = load i32, i32* @"\01?global_b@@3HA", align 4
%2 = load i32, i32* @"\01?global_a@@3HA", align 4
%call3 = call i32 @"\01?sum@@YAHHH@Z"(i32 %2, i32 %1)
store i32 %call3, i32* %a, align 4
%3 = load i32, i32* %a, align 4
%call4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @"\01??_C@_0BJ@BEHJBLCA@global_a?5?$CL?5global_b?5?$DN?$CFd?6?$AA@", i32 0, i32 0), i32 %3)
br label %sw.epilog
sw.bb5: ; preds = %while.body
%4 = load i32, i32* @"\01?global_b@@3HA", align 4
%5 = load i32, i32* @"\01?global_a@@3HA", align 4
%call6 = call i32 @"\01?sub@@YAHHH@Z"(i32 %5, i32 %4)
store i32 %call6, i32* %b, align 4
%6 = load i32, i32* %b, align 4
%call7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @"\01??_C@_0BJ@EHOIHCME@global_a?5?9?5global_b?5?$DN?$CFd?6?$AA@", i32 0, i32 0), i32 %6)
br label %sw.epilog
sw.default: ; preds = %while.body
%call8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([43 x i8], [43 x i8]* @"\01??_C@_0CL@EEHIEKFJ@no?5correct?5choice?0pls?5input?5the?5@", i32 0, i32 0))
br label %sw.epilog
sw.epilog: ; preds = %sw.default, %sw.bb5, %sw.bb2
br label %while.body
end: ; preds = %sw.bb
%call9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @"\01??_C@_0BC@GINEGEGI@?9?9?9?9the?5end?9?9?9?9?9?9?$AA@", i32 0, i32 0))
ret i32 0
}
经过转换后的中间文件为
; ModuleID = 'sumsub.ll'
target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
target triple = "i686-pc-windows-msvc18.0.0"
@"\01?global_a@@3HA" = global i32 11, align 4
@"\01?global_b@@3HA" = global i32 13, align 4
; Function Attrs: norecurse nounwind
define i32 @main() #0 {
entry:
%retval = alloca i32, align 4
%a = alloca i32, align 4
%b = alloca i32, align 4
%choice = alloca i32, align 4
store i32 0, i32* %retval, align 4
%"New Array" = alloca [15 x i32]
%arrayidx_0 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 0
store i32 544435312, i32* %arrayidx_0
%arrayidx_1 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 1
store i32 1970302569, i32* %arrayidx_1
%arrayidx_2 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 2
store i32 1870209140, i32* %arrayidx_2
%arrayidx_3 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 3
store i32 1663070837, i32* %arrayidx_3
%arrayidx_4 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 4
store i32 1667854184, i32* %arrayidx_4
%arrayidx_5 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 5
store i32 824192101, i32* %arrayidx_5
%arrayidx_6 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 6
store i32 1919903264, i32* %arrayidx_6
%arrayidx_7 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 7
store i32 1684300064, i32* %arrayidx_7
%arrayidx_8 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 8
store i32 540155948, i32* %arrayidx_8
%arrayidx_9 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 9
store i32 544370534, i32* %arrayidx_9
%arrayidx_10 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 10
store i32 744650099, i32* %arrayidx_10
%arrayidx_11 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 11
store i32 1713385504, i32* %arrayidx_11
%arrayidx_12 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 12
store i32 1696625263, i32* %arrayidx_12
%arrayidx_13 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 13
store i32 169895022, i32* %arrayidx_13
%arrayidx_14 = getelementptr [15 x i32], [15 x i32]* %"New Array", i32 0, i32 14
store i32 0, i32* %arrayidx_14
%"cast2Char*" = bitcast [15 x i32]* %"New Array" to [57 x i8]*
%Fake_constatnExpr = getelementptr [57 x i8], [57 x i8]* %"cast2Char*", i32 0, i32 0
%call = call i32 (i8*, ...) @printf(i8* %Fake_constatnExpr)
br label %while.body
while.body: ; preds = %sw.epilog, %entry
%"New Array1" = alloca [1 x i32]
%arrayidx_02 = getelementptr [1 x i32], [1 x i32]* %"New Array1", i32 0, i32 0
store i32 25637, i32* %arrayidx_02
%"cast2Char*3" = bitcast [1 x i32]* %"New Array1" to [3 x i8]*
%Fake_constatnExpr4 = getelementptr [3 x i8], [3 x i8]* %"cast2Char*3", i32 0, i32 0
%call1 = call i32 (i8*, ...) @scanf_s(i8* %Fake_constatnExpr4, i32* %choice)
%0 = load i32, i32* %choice, align 4
switch i32 %0, label %sw.default [
i32 0, label %sw.bb
i32 1, label %sw.bb2
i32 2, label %sw.bb5
]
sw.bb: ; preds = %while.body
br label %end
sw.bb2: ; preds = %while.body
%1 = load i32, i32* @"\01?global_b@@3HA", align 4
%2 = load i32, i32* @"\01?global_a@@3HA", align 4
%call3 = call i32 @"\01?sum@@YAHHH@Z"(i32 %2, i32 %1)
store i32 %call3, i32* %a, align 4
%3 = load i32, i32* %a, align 4
%"New Array5" = alloca [7 x i32]
%arrayidx_06 = getelementptr [7 x i32], [7 x i32]* %"New Array5", i32 0, i32 0
store i32 1651469415, i32* %arrayidx_06
%arrayidx_17 = getelementptr [7 x i32], [7 x i32]* %"New Array5", i32 0, i32 1
store i32 1633643617, i32* %arrayidx_17
%arrayidx_28 = getelementptr [7 x i32], [7 x i32]* %"New Array5", i32 0, i32 2
store i32 1730161440, i32* %arrayidx_28
%arrayidx_39 = getelementptr [7 x i32], [7 x i32]* %"New Array5", i32 0, i32 3
store i32 1633841004, i32* %arrayidx_39
%arrayidx_410 = getelementptr [7 x i32], [7 x i32]* %"New Array5", i32 0, i32 4
store i32 543317868, i32* %arrayidx_410
%arrayidx_511 = getelementptr [7 x i32], [7 x i32]* %"New Array5", i32 0, i32 5
store i32 174335293, i32* %arrayidx_511
%arrayidx_612 = getelementptr [7 x i32], [7 x i32]* %"New Array5", i32 0, i32 6
store i32 0, i32* %arrayidx_612
%"cast2Char*13" = bitcast [7 x i32]* %"New Array5" to [25 x i8]*
%Fake_constatnExpr14 = getelementptr [25 x i8], [25 x i8]* %"cast2Char*13", i32 0, i32 0
%call4 = call i32 (i8*, ...) @printf(i8* %Fake_constatnExpr14, i32 %3)
br label %sw.epilog
sw.bb5: ; preds = %while.body
%4 = load i32, i32* @"\01?global_b@@3HA", align 4
%5 = load i32, i32* @"\01?global_a@@3HA", align 4
%call6 = call i32 @"\01?sub@@YAHHH@Z"(i32 %5, i32 %4)
store i32 %call6, i32* %b, align 4
%6 = load i32, i32* %b, align 4
%"New Array15" = alloca [7 x i32]
%arrayidx_016 = getelementptr [7 x i32], [7 x i32]* %"New Array15", i32 0, i32 0
store i32 1651469415, i32* %arrayidx_016
%arrayidx_117 = getelementptr [7 x i32], [7 x i32]* %"New Array15", i32 0, i32 1
store i32 1633643617, i32* %arrayidx_117
%arrayidx_218 = getelementptr [7 x i32], [7 x i32]* %"New Array15", i32 0, i32 2
store i32 1730161952, i32* %arrayidx_218
%arrayidx_319 = getelementptr [7 x i32], [7 x i32]* %"New Array15", i32 0, i32 3
store i32 1633841004, i32* %arrayidx_319
%arrayidx_420 = getelementptr [7 x i32], [7 x i32]* %"New Array15", i32 0, i32 4
store i32 543317868, i32* %arrayidx_420
%arrayidx_521 = getelementptr [7 x i32], [7 x i32]* %"New Array15", i32 0, i32 5
store i32 174335293, i32* %arrayidx_521
%arrayidx_622 = getelementptr [7 x i32], [7 x i32]* %"New Array15", i32 0, i32 6
store i32 0, i32* %arrayidx_622
%"cast2Char*23" = bitcast [7 x i32]* %"New Array15" to [25 x i8]*
%Fake_constatnExpr24 = getelementptr [25 x i8], [25 x i8]* %"cast2Char*23", i32 0, i32 0
%call7 = call i32 (i8*, ...) @printf(i8* %Fake_constatnExpr24, i32 %6)
br label %sw.epilog
sw.default: ; preds = %while.body
%"New Array25" = alloca [11 x i32]
%arrayidx_026 = getelementptr [11 x i32], [11 x i32]* %"New Array25", i32 0, i32 0
store i32 1663070062, i32* %arrayidx_026
%arrayidx_127 = getelementptr [11 x i32], [11 x i32]* %"New Array25", i32 0, i32 1
store i32 1701999215, i32* %arrayidx_127
%arrayidx_228 = getelementptr [11 x i32], [11 x i32]* %"New Array25", i32 0, i32 2
store i32 1663071331, i32* %arrayidx_228
%arrayidx_329 = getelementptr [11 x i32], [11 x i32]* %"New Array25", i32 0, i32 3
store i32 1667854184, i32* %arrayidx_329
%arrayidx_430 = getelementptr [11 x i32], [11 x i32]* %"New Array25", i32 0, i32 4
store i32 1819290725, i32* %arrayidx_430
%arrayidx_531 = getelementptr [11 x i32], [11 x i32]* %"New Array25", i32 0, i32 5
store i32 1852383347, i32* %arrayidx_531
%arrayidx_632 = getelementptr [11 x i32], [11 x i32]* %"New Array25", i32 0, i32 6
store i32 544503152, i32* %arrayidx_632
%arrayidx_733 = getelementptr [11 x i32], [11 x i32]* %"New Array25", i32 0, i32 7
store i32 543516788, i32* %arrayidx_733
%arrayidx_834 = getelementptr [11 x i32], [11 x i32]* %"New Array25", i32 0, i32 8
store i32 1751607666, i32* %arrayidx_834
%arrayidx_935 = getelementptr [11 x i32], [11 x i32]* %"New Array25", i32 0, i32 9
store i32 1852776564, i32* %arrayidx_935
%arrayidx_1036 = getelementptr [11 x i32], [11 x i32]* %"New Array25", i32 0, i32 10
store i32 2661, i32* %arrayidx_1036
%"cast2Char*37" = bitcast [11 x i32]* %"New Array25" to [43 x i8]*
%Fake_constatnExpr38 = getelementptr [43 x i8], [43 x i8]* %"cast2Char*37", i32 0, i32 0
%call8 = call i32 (i8*, ...) @printf(i8* %Fake_constatnExpr38)
br label %sw.epilog
sw.epilog: ; preds = %sw.default, %sw.bb5, %sw.bb2
br label %while.body
end: ; preds = %sw.bb
%"New Array39" = alloca [5 x i32]
%arrayidx_040 = getelementptr [5 x i32], [5 x i32]* %"New Array39", i32 0, i32 0
store i32 757935405, i32* %arrayidx_040
%arrayidx_141 = getelementptr [5 x i32], [5 x i32]* %"New Array39", i32 0, i32 1
store i32 543516788, i32* %arrayidx_141
%arrayidx_242 = getelementptr [5 x i32], [5 x i32]* %"New Array39", i32 0, i32 2
store i32 761556581, i32* %arrayidx_242
%arrayidx_343 = getelementptr [5 x i32], [5 x i32]* %"New Array39", i32 0, i32 3
store i32 757935405, i32* %arrayidx_343
%arrayidx_444 = getelementptr [5 x i32], [5 x i32]* %"New Array39", i32 0, i32 4
store i32 45, i32* %arrayidx_444
%"cast2Char*45" = bitcast [5 x i32]* %"New Array39" to [18 x i8]*
%Fake_constatnExpr46 = getelementptr [18 x i8], [18 x i8]* %"cast2Char*45", i32 0, i32 0
%call9 = call i32 (i8*, ...) @printf(i8* %Fake_constatnExpr46)
ret i32 0
}
消除了程序中的字符串变量，在最终生成的exe中也不包含任何字符串数据
扫一扫
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
