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...you want the same code to handle GetElementPtrConstantExpr *and* GetElementPtrInst, you can use GEPOperator. > > Thanks, > -- Sanjoy > > [1]: > http://llvm.org/docs/doxygen/html/classllvm_1_1GetElementPtrConstantExpr.html > > On Sat, Nov 22, 2014 at 1:10 AM, Qiuping Yi <yiqiuping at gmail.com> wrote: > > Hi Michael, > > > > Thank you very much. > > > > But idx_begin/idx_end iterators can only be used through a getelementptr > > instruction, right? However, I think value "i32* getelementptr inbounds > > (%struct.Args* @glo...

...se functions in > documentation [1], or look at examples of their uses in the code, e.g. > in lib/Transforms/InstCombine/*.cpp. > > [1] http://llvm.org/doxygen/classllvm_1_1GetElementPtrInst.html > > Best regards, > Michael > > On Nov 22, 2014, at 12:32 AM, Qiuping Yi <yiqiuping at gmail.com> wrote: > > Hi, all > > I am a LLVM user. I want to get every element in the next instruction: > > %0 = load i32* getelementptr inbounds (%struct.Args* @globalArg, i64 0, > i32 2), align 4, !dbg !85, !clap !86 > > Now I can only get value "i32* get...

Hi, Here are my submitted proposals, and they are still in progress. Wellcome your comments, if you have some interest in the topics. Update the SAFCode project to the new LLVM API http://blog.csdn.net/yiqiuping/archive/2010/04/06/5453367.aspx Check bounds overflow bugs in C programs based on LLVM http://blog.csdn.net/yiqiuping/archive/2010/04/06/5453368.aspx ABCD: Eliminating Array Bounds Checks on Demand http://blog.csdn.net/yiqiuping/archive/2010/04/06/5453348.aspx 2010-04-06 yiqiuping19...

...iences On Wed, Jan 20, 2016 at 2:24 PM, Nema, Ashutosh <Ashutosh.Nema at amd.com> wrote: > Typically for C++ virtual function you will see an indirect callSite > (unless not de-virtualized). > > > > Regards, > > Ashutosh > > > > *From:* Qiuping Yi [mailto:yiqiuping at gmail.com] > *Sent:* Wednesday, January 20, 2016 9:10 AM > *To:* Nema, Ashutosh > *Cc:* llvm-dev > *Subject:* Re: [llvm-dev] Why getFunction() of CallGraphNode return NULL > function? > > > > Dear Ashutosh, > > > > Thank you, I can handle some indirect c...

Hi, all I am a LLVM user. I want to get every element in the next instruction: %0 = load i32* getelementptr inbounds (%struct.Args* @globalArg, i64 0, i32 2), align 4, !dbg !85, !clap !86 Now I can only get value "i32* getelementptr inbounds (%struct.Args* @globalArg, i64 0, i32 2)" through "getOperand(0)", but I can not get "%struct.Args* @globalArg", "i64

Dear Ashutosh, Thank you, I can handle some indirect callSites by getFunction() of InvokInst and CallInst. However, when I am handling C++ programs, I found the calls of member functions are converted to some strange indirect calls. For example: table->truncate(sysTransaction); // from mysql are translated to the next complex llvm IR: _ZN8Database20getSystemTransactionEv.exit: ;

Which compiler are you using to compile poolalloc? Looks like it doesn't support C++11 (doesn't recognize nullptr). Jingyue On Fri, Jan 30, 2015 at 8:32 PM, Qiuping Yi <yiqiuping at gmail.com> wrote: > Hi, John Criswell > > Thank you very much. > > I am installing LLVM-3.2, but I encounter the next error when carrying out > "make": > > llvm[3]: Compiling ClangASTNodesEmitter.cpp for Release+Asserts build > ClangASTNodesEmitter.cpp...

Hi, John Criswell Thank you very much. I am installing LLVM-3.2, but I encounter the next error when carrying out "make": llvm[3]: Compiling ClangASTNodesEmitter.cpp for Release+Asserts build ClangASTNodesEmitter.cpp: In member function ‘std::pair<llvm::Record*, llvm::Record*><unnamed>::ClangASTNodesEmitter::EmitNode(const std::multimap<llvm::Record*, llvm::Record*,

Dear Daniel Berlin, I just tried MemorySSA analysis and get the next IR. However, I feel confused by the result. Specifically, why instruction *%3* relates to a *MemoryDef*. According to my understanding, I think *%3* should be related to a *MemoryUse*, right? ; Function Attrs: uwtable define void @_Z2f1v() #3 personality i32 (...)* @__gxx_personality_v0 { entry: ; 1 = MemoryDef(liveOnEntry)

...optimization technologies. Now I also attend another project based on LLVM, in which I need to implement detecting whether the subscript is out of the bounds of arrays. I hope I can have a chance to make some contribution to LLVM and Clang. Qiuping Yi 2010-03-25 ------------------------------ yiqiuping1986 ------------------------------ *发件人：* John Regehr *发送时间：* 2010-03-23 08:43:21 *收件人：* llvmdev *抄送：* *主题：* [LLVMdev] Summer of Code idea -- detecting undefined behavior Is anyone interested in a SoC project to further develop Clang's support for detecting undefined behaviors in C/C++? T...

...project, perhaps I haven’t seriously thought over it. > > > > My idea come from a master thesis, and I send it to you as an > attachment. > > > > > > > > 2010-03-31 > > ------------------------------------------------------------------------ > > yiqiuping1986 > > ------------------------------------------------------------------------ > > *发件人：* John Regehr > > *发送时间：* 2010-03-30 22:37:49 > > *收件人：* $B0W=)hL (J > > *抄送：* llvmdev > > *主题：* Re: [LLVMdev]summer_of_code_idea_―_checking_bounds_overflow_bugs > &g...

When I use the next code to print all the opcode name in a file xx.o whose source file contains statements "if (diff != 0) klee_assume(diff>0)", then an opcode name 'and' was printed. Where is the 'and' instruction from? I checked the file xx.ll of xx.o and I didn't find a 'and' instruction of these two statements. Besides, when I commented out statement

Hi, all When I compile the C code containing the next statement to LLVM, *struct A const o = func(...);* I got the next corresponding LLVM bytecode *call void @func(%struct.A* noalias sret %o, ...)* Could you tell me why function "func" with a return value is changed to be one with a void return value and another more parameter %o. Does "noalias sret" play a special role?

Hi, all I want to use the alias analysises in project poolalloc, but I encounter some problem during installing it. I install poolalloc as follow: 1) cd llvm/projects svn co http://llvm.org/svn/llvm-project/poolalloc/branches/release_32 poolalloc 3) cd LLVM-object-directory make tools-only cd projects/poolalloc make When I carried out "make", I get the next error

Thank you. But now I am using LLVM 2.9, so which version of poolalloc I should use ? -------------------------------------------- Qiuping Yi Institute Of Software Chinese Academy of Sciences On Fri, Jan 30, 2015 at 11:12 PM, John Criswell <jtcriswel at gmail.com> wrote: > Dear Qiuping, > > If you use the release_32 branch of poolalloc, then you need to use LLVM > 3.2. >

I am just not upgrade my LLVM. So I must use some higer LLVM version, right? -------------------------------------------- Qiuping Yi Institute Of Software Chinese Academy of Sciences On Fri, Jan 30, 2015 at 11:21 PM, John Criswell <jtcriswel at gmail.com> wrote: > On 1/30/15 10:17 AM, Qiuping Yi wrote: > > Thank you. But now I am using LLVM 2.9, so which version of poolalloc I

Hi, Some days ago I am interested in detecting undefined behaviors in C programs based on Clang. After several days’ investigation, I think checking bounds overflow bugs is more interesting, because bounds overflow is one of the most frequently encountered errors in C programs. For example, performing pointer arithmetic without checking bounds can cause bounds overflow. To increase the

Hi everyone, I have some trouble in instrumenting load instructions. I want to instrument load instructions as follow: Firstly, I judge whether the loaded pointer(*any type is possible*) is NULL. If so, I want to explicitly allocate the corresponding address space of its type to the pointer. For example, in source code level I want to translate the next statement *p = 1; into the next