致命错误:后端错误:无法选择:0x7793fa0:f64 = xor 0x74291b0,常量:i8< -3> [英] fatal error: error in backend: Cannot select: 0x7793fa0: f64 = xor 0x74291b0, Constant:i8<-3>
问题描述
这是我使用以下命令时的错误消息:
This is the error message when I use the following command:
clang++ test.cpp -mypass -fno-use-cxa-atexit
直接使用我的转换过程编译我的test.cpp
源文件.
to compile my test.cpp
source file directly with my transform pass.
Error message:
fatal error: error in backend: Cannot select: 0x7793fa0: f64 = xor 0x74291b0,
Constant:i8<-3>
0x74291b0: f64,ch = load<LD8[%1064](align=1)> 0x732b440, 0x74317d0, undef:i64
0x74317d0: i64 = add 0x7794390, 0x7428f10
0x7794390: i64 = shl 0x7464360, Constant:i8<3>
0x7464360: i64 = sign_extend 0x7430d50
0x7430d50: i32,ch = CopyFromReg 0x732b440, Register:i32 %vreg212
0x77949b0: i32 = Register %vreg212
0x77bbd40: i8 = Constant<3>
0x7428f10: i64 = X86ISD::Wrapper TargetGlobalAddress:i64<[27 x double]* @_ZZ9test_mainiPPcE5valsA.291> 0
0x77904a0: i64 = TargetGlobalAddress<[27 x double]* @_ZZ9test_mainiPPcE5valsA.291> 0
0x7431990: i64 = undef
0x77bbdb0: i8 = Constant<-3>
In function: .datadiv_decode15430557481081536446
clang-3.9: error: clang frontend command failed with exit code 70 (use -v to see invocation)
clang version 3.9.1 (tags/RELEASE_391/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/oubotong/obf/bin
clang-3.9: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script.
clang-3.9: note: diagnostic msg:
********************
但是,当我使用以下命令分别编译时:
However, when I use the following command to compile seperately:
clang++ -emit-llvm -S test.cpp -mypass -fno-use-cxa-atexit
此命令生成test.ll
,然后使用:
This command generate test.ll
and then use:
llvm-as test.ll -o test.bc
生成test.bc
并最终使用:
lli test.bc
运行程序.
没有错误,我的程序运行良好.
那么为什么直接编译test.cpp
时出现错误?
这是我通过的源代码的一部分:
to run the program.
There are no errors and my program works well.
Then why the error came when I compile the test.cpp
directly?
Here is part of my source code in pass:
LoadInst *Load=builder.CreateLoad(gvar);
Load->setAlignment(8);
Value* indexList[2] = {ConstantInt::get(variable->getType(), 0), variable};
Value *const_key=builder.getInt8(key);
Value *GEP=builder.CreateGEP(gvar,ArrayRef<Value*>(indexList, 2),"arrayIdx");
LoadInst *loadElement=builder.CreateLoad(GEP);
loadElement->setAlignment(1);
Value *Xor = builder.CreateXor(loadElement,const_key,"xor");
StoreInst *Store = builder.CreateStore(Xor, GEP);
Store->setAlignment(1);
推荐答案
答案很晚,但是实际上,当您拥有.ll
文件时,llc
命令可以为您提供一些有意义的提示,说明为什么事情没有编译
Pretty late answer but actually, when you have the .ll
file, the llc
command can give you some meaningful hints on why things aren't compiling.
Cannot select
错误更加隐秘.
这篇关于致命错误:后端错误:无法选择:0x7793fa0:f64 = xor 0x74291b0,常量:i8< -3>的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!