similar to: [LLVMdev] Question. about Machinefunction pass, funtion Prolog/Epilog code, stack frame

Hi All, When seeing the title "Prolog/Epilog Code Insertion", I'd expect something about XXXFrameLowering.cpp (particular about emitPrologue/emitEpilogue). But the document [1] is about unwind. Is it placed at the right place/section? Thanks. [1] http://llvm.org/docs/CodeGenerator.html#prolog-epilog-code-insertion Regards, chenwj -- Wei-Ren Chen (陳韋任) Homepage:

I've been looking through the code for pologue/epilogoue generation and noticed this oddity: void PEI::replaceFrameIndices(MachineFunction &Fn) { [...] for (MachineBasicBlock::iterator I = BB->begin(); I != BB->end(); ) { [...] if (I->getOpcode() == FrameSetupOpcode || I->getOpcode() == FrameDestroyOpcode) { [...] } else {

Hello, I'd like to upstream our work over the time which the community would benefit from. This is a part of effort toward minimizing code size presented in here <https://llvm.org/devmtg/2020-02-23/slides/Kyungwoo-GlobalMachineOutlinerForThinLTO.pdf>. In particular, this RFC is about optimizing prolog and epilog for size. *Homogeneous Prolog and Epilog for Size Optimization, D76570

Hi Vedant, Thanks for your interest and comment. Size-optimization improves page-faults and a start-up time for a large application, which this enabling also followed. Even though I didn't see a large regression/complaint on a CPU-bound case, which is not a typical case for mobile workload, I wanted to be precautious of enabling it by default. However, as with default outlining case, I

Hello, it seems the Prolog/Epilog insertion does not correctly align stack for me. Consider the PEI::calculateFrameObjectOffsets method. It only aligns the stack if FFI->hasCalls() is true. The only place where MachineFrameInfo::setHasCalls is invoked is PEI::saveCallerSavedRegisters and the value 'true' is only passed when there are instructions with opcodes equal

Hi all: I wrote some IR transform passes that works perfectly fine at IR level and running through opt -verify on the yielded IR results in no error. However when I try to compile the transformed IR into object code using llc Output.ll -filetype=obj , it asserts out with Assertion failed: (unsigned(ObjectIdx+NumFixedObjects) < Objects.size() && "Invalid Object Idx!"), function

I'm trying to implement something similar to this: http://gcc.gnu.org/wiki/SplitStacks in LLVM. The reason I want this is so that I can have dynamically growing and shrinking stacks in my programming language. In order to do this, I need to be able to check for overflow of a stack frame. The methods of doing this are outlined in the link above, but my intention is to pass the current stack

On Wed, Apr 7, 2010 at 12:43 PM, Arlen Cox <arlencox at gmail.com> wrote: > I'm trying to implement something similar to this: > http://gcc.gnu.org/wiki/SplitStacks in LLVM.  The reason I want this > is so that I can have dynamically growing and shrinking stacks in my > programming language.  In order to do this, I need to be able to check > for overflow of a stack frame.

Chris Lattner skrev: > On Feb 22, 2010, at 6:08 AM, Kalle.Raiskila at nokia.com wrote: >> currently the SPU backend does not handle big stack frames (>16*511 >> bytes) nicely. llc asserts on malformed machine instructions. >> (Assertion `MI->getOperand(OpNo).isImm() && "printDFormAddr first >> operand is not immediate") > > Sounds fine

I am running into an issue where if I have multiple functions compiled in the same compilation unit the stack offset is not starting at zero. For example: func1(...) { ... } func2(...) { ... } Say the first function uses 64 bytes of the stack and an assumed offset of 0 and the second function uses 32 bytes of the stack but an assumed offset of 64. I've found out how to get the

This is a feature I’m considering for the LLVM backend. Feel free to provide input in the following PR. llvm.org/pr19267 - Add a feature to clobber non-callee-save regs in the prolog. I’m copying llvm-dev because it seems like something that others must have already done or at least thought about at some point. -Andy

How/where are function prologs and epilogs generated, is it bespoke C++ code or TableGen generated ? If someone could point me in the right direction please. Many thanks in advance, Aaron -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20090409/fb3336e4/attachment.html>

Hello, Aaron > How/where are function prologs and epilogs generated, is it bespoke C++ code > or TableGen generated ? > > If someone could point me in the right direction please. Calling convention is really-really far from prologue/epilogue emission :) So: 1. Calling conventions Partly tablegen / partly C++ code. Look for CodeGen/SelectionDAG/CallingConvLower.cpp,

On Apr 9, 2009, at 11:11 AMPDT, Aaron Gray wrote: > On Thu, Apr 9, 2009 at 4:34 PM, Anton Korobeynikov <anton at korobeynikov.info > > wrote: > Hello, Aaron > > > How/where are function prologs and epilogs generated, is it > bespoke C++ code > > or TableGen generated ? > > > > If someone could point me in the right direction please. > Calling

Hi, I would like to display results on the screen . Can I use the printf function in LLVM? How do I call the funtion? Could someone give me an example Thanks Jai

Have any way to write a funtion into a list ? -- Nash - morrison at ibms.sinica.edu.tw

Hi, I have a variable X classified in a lot of groups and I need to run the [fitdistr] funtion for each group. I tried with the [by] or the [tapply] funtions because my data is organize in two columns (variable and the groups), but neither of these command work. If somebody have a tip to help me up I really appreciate it. thanks, [[alternative HTML version deleted]]

On Thu, Apr 9, 2009 at 4:34 PM, Anton Korobeynikov <anton at korobeynikov.info>wrote: > Hello, Aaron > > > How/where are function prologs and epilogs generated, is it bespoke C++ > code > > or TableGen generated ? > > > > If someone could point me in the right direction please. > Calling convention is really-really far from prologue/epilogue emission :)

Hei, I just wonder the use of family=binomial in glm function. As I learned from book (e.g. Andy Field) that logistic regression (binary logit) can use glm funtion with family = binomial. Here the y is a factor variable (e.g. value = 1 or 2). But I have also seen i many other cases, same function glm with family=binomial, but y is a variable with several column , like y= cbind(y1, y2), and

Just compile a trivial C program containing printf through llvm-gcc and you will see how to call printf from within llvm. You could even do it on the llvm web page if you don't have llvm-gcc installed. --Vikram http://www.cs.uiuc.edu/~vadve http://llvm.cs.uiuc.edu/ On Dec 11, 2004, at 1:13 AM, <vasanth2 at uiuc.edu> wrote: > Hi, > > I would like to display results on the