similar to: [LLVMdev] Is there a path from MachineInstr to the associated Instruction

Within a basic block this is just normal iterator usage/manipulation: for (instr : llvm::make_range(FromInstruction.getIterator(), ToInstruction.getIterator())) { ... } Use std::next() on ToInstruction.getIterator() if you want it included. - Matthias > On Apr 9, 2018, at 10:04 AM, Alexandre Isoard via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > Hello, > > Is there

Hi, I want to know what is the type or size of a virtual register in a Machineinstr::MachineOperand (If this MachineOperand is a register). For example, what is the size of reg16385 in the following MachineInstr. I know now in the llvm bitcode, the type of a Instruction could be obtained from the Value::GetType(), but what is the counterpart in MachineInstr (not derived from class Value)?

Thanks for your help with me about the way to access type and size of Value. But, I want also know the interface for me to access the type or size of virtual registers in the SSA form. 1. I find no way to associate the virtual registers with the Value class. 2. I also tried to get the size of register nReg by: TargetRegisterClass::getSize(), where the TargetRegisterClass object is obtained by

Hi, I wonder if there is an interface for me to access the type or size of virtual registers in the SSA form? I have scanned the MachineOperand in CodeGen part, and failed to find this kind of info for virtual registers. -- Best regards, Li Qingan -------------- next part -------------- An HTML attachment was scrubbed... URL:

---------- Forwarded message ---------- From: Qingan Li <ww345ww at gmail.com> Date: 2011/5/30 Subject: To: llvmdev at cs.uiuc.edu Hi, I wrote an analysis pass, myPass, inherited from both ModulePass and ProfileInfo, and this pass requires the CallGraph, i.e., * class myPass : public ModulePass, public ProfileInfo { ...};* * void myPass::getAnalysisUsage(AnalysisUsage &AU) const

Hal's advice helps me a lot to understand the implementation much better. Thanks so much! So, now I am able to state my problem more clearly: 1) There are two kinds of locals, i.e., the local variables originated from the source code (like C/C++), and the compilation generated temporaries. After instruction selection phase, the former is seen as frame indexes, while the latter is seen as

Hello, Is there an iterator to iterate over a "range" of instructions in a Function? "range" meaning from an instruction::iterator up to an other instruction::iterator which either: - point to instructions in the same basic block (the first one first, second one second) - point to instructions in different basic block (the BB of the first dominate the BB of the second, and

*1. I have searched the access/setting of LLVMCC_EMITIR_FLAG in the build directory, recursively, and all the output is what I pasted in last email (just the same to the that in source directory). Maybe the configure failed to do it. My command list for building the test suit is as followings:* *(1) cd ~/SRC_DIR/llvm/projects* *(2) svn co http://llvm.org/svn/llvm-project/test-suite/trunk

On 1/28/11 8:14 AM, Qingan Li wrote: > Thanks for your help with me about the way to access type and size of > Value. > But, I want also know the interface for me to access the type or size > of virtual registers in the SSA form. > 1. I find no way to associate the virtual registers with the Value class. In the in-memory LLVM IR, all of the SSA values are C++ objects derived

Hi Li Qingan, > Thanks for your last reply. > I have made a critical mistake when I stated my question in last email. > I built llvm in debug mode, but the NDEBUG seemed to be still defined, such that > the -debug option is not enabled. > I have restated my configuration below. you need to configure with --enable-assertions In spite of the name, NDEBUG is not related to

On 1/27/11 3:23 AM, Qingan Li wrote: > Hi, > > I wonder if there is an interface for me to access the type or size of > virtual registers in the SSA form? > I have scanned the MachineOperand in CodeGen part, and failed to find > this kind of info for virtual registers. The getType() method of Value * will return the LLVM type. The TargetData class will provide information on

llvm::TargetRegisterClass::getSize() llvm::TargetRegisterClass::getAllignment() will return the size and alignment of a virtual register used both in register allocation and stack slot assignment. llvm::TargetRegisterClass::alloc_order_begin() llvm::TargetRegisterClass::alloc_order_end() will give a list of the possible physical registers. When a virtual register is assigned a physical register

When I searched for branch frequency profiling on the internet, I got this link by a casual chance: http://homepages.dcc.ufmg.br/~rimsa/tools/stprof-llvm.patch. It seems it was written by Andrei Rimsa. So I downloaded and integrate these files into the llvm-2.8 building. After the building, I tried "opt -static-profile bitcnt_1.bc", and an segment fault error occured. I debugged it

Hi, Can anyone help me with the stack slot coloring optimization? This corresponding file is /lib/codegen/stackslotcoloring.cpp. It is said this optimization was for stack slot overlay for frame size reduction, after register allocation phase. And this transformation pass relies on the LiveStack analysis pass. How, when checking the source code, it seems the LiveStack analysis has not been

Hi sir, I have built the test suits in following steps: 0. $cd LLVM_GCC_DIR; $gunzip --stdout llvm-gcc-4.2-*version*-* platform*.tar.gz | tar -xvf - 1. $cd SRC_DIR/llvm-2.8/projects 2. $svn co http://llvm.org/svn/llvm-project/test-suite/trunk test-suite 3.$cd OBJ_DIR; 4. $SRC_DIR/configure --prefix=INS_DIR --enable-debug-runtime --disable-optimized --enable-debug-symbols

> Debug information can be placed in the assembler source. This is what > GCC does; you can see for yourself if you run > gcc -g -save-temps filename.c I guess he want to ask if llc can emit debugging information which GDB can use. Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.) Tel:886-2-2788-3799 #1667

Thanks John, The reason I want to do this is that register allocator works only on SSA form, and if you instrument regallocated code with non-regallocated machine instructions, then you cannot regallocate the result. A workaround is to assign physical registers while doing the instrumentation, which I don't think is as easy as the above. On Tue, Sep 23, 2014 at 11:01 AM, John Criswell

I am sorry for my poor statement of my problem. Yes, ��f�� is right. I want to know whether llvm could emit debugging information which GDB could use directly. Ex, how does the executable file generated from llc could be debug using gdb? A simple demonstration is greatly appreciated. 2011/6/14 ��f�� <chenwj at iis.sinica.edu.tw> > > Debug information can be placed in the assembler

Hi, I'm wondering how I can convert "register allocated" code back to SSA form. I realized from MachineRegisterInfo.h that a function leaves SSA form only once and cannot be taken back to it. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20140923/0124addd/attachment.html>

*[qali at qali llvm-2.8-rev]$ find . -exec grep -n "LLVMCC_EMITIR_FLAG" ./ {} \;* ./projects/test-suite/Makefile.tests:47: -$(LCC) $(CPPFLAGS) $(CFLAGS) $(LOPTFLAGS) $(X_TARGET_FLAGS) -S $< -o $@ $(LLVMCC_EMITIR_FLAG) ./projects/test-suite/Makefile.tests:51: -$(LCXX) $(CPPFLAGS) $(CXXFLAGS) $(LOPTFLAGS) $(X_TARGET_FLAGS) -S $< -o $@ $(LLVMCC_EMITIR_FLAG)