similar to: [LLVMdev] failed assertion in PPCJITInfo.cpp when calling native function

Hi, This is a follow up to my previous email since I have now found out a bit more about what goes wrong. I am generating JIT code that calls a native function, but I get the following assertion telling me that the PC relative jump is too long: /llvm/lib/Target/PowerPC/PPCJITInfo.cpp:206: failed assertion `ResultPtr >= -(1 << 23) && ResultPtr < (1 << 23) &&

Hi Andreas, > /llvm/lib/Target/PowerPC/PPCJITInfo.cpp:206: failed assertion > `ResultPtr >= -(1 << 23) && ResultPtr < (1 << 23) && "Relocation out > of range!"' > ... > So how is this supposed to work? Is it wrong that the memory block for > the JIT code is allocated too far off or should a non PC relative jump > be generated

Hi Jan, > Calling printf works at least on OS X (I'm waiting for a reply > whether this works on linux). If I call my native function it fails > with PPCJITInfo.cpp:382: failed assertion `ResultPtr >= -(1 << 23) && > ResultPtr < (1 << 23) && "Relocation out of range!"' I know nothing about this, but the failed assertion suggests the

> Are you able make calls to well known external functions such as > printf? As far as I known, this capability is well tested on x86 / > Linux. Calling printf works at least on OS X (I'm waiting for a reply whether this works on linux). If I call my native function it fails with PPCJITInfo.cpp:382: failed assertion `ResultPtr >= -(1 << 23) && ResultPtr < (1

Hi Jan, If I recall correctly, in Linux you get the message: PPCJITInfo.cpp:382: failed assertion `ResultPtr >= -(1 << 23) && ResultPtr < (1 << 23) && "Relocation out of range!"' Right? But on OS X you don't have this messsage? Here's a temporary fix until I find time to investigate on this: In function PPCISelLowering::LowerCALL,

Run with -debug-only=jit. Break on line 1148 of JITEmitter.cpp. The debugging message will tell you the address and size of the function that was jitted. You can then tell gdb to disassemble the code. On Mar 26, 2009, at 11:35 PM, Jeffrey Yasskin wrote: > Hi all. I'm working on the recently-announced unladen-swallow project, > and I'm having a bit of trouble getting gdb to

Hi all. I'm working on the recently-announced unladen-swallow project, and I'm having a bit of trouble getting gdb to step into functions I've compiled with LLVM's JIT compiler. The attached a_module.ll is the module I produce from compiling def foo(r): for i in r: pass I'm JIT-compiling and running foo() with: typedef PyObject *(*NativeFunction)(PyFrameObject *);

Hi, > If I recall correctly, in Linux you get the message: > > PPCJITInfo.cpp:382: failed assertion `ResultPtr >= -(1 << 23) && > ResultPtr < (1 << 23) && "Relocation out of range!"' > > > Right? But on OS X you don't have this messsage? Not exactly. There seem to be two problems. Your patch fixes one of them: in OS X I

Ok, thanks for the reply. > In other words, the code generator needs improving to cope with a jump > to an address that is too far away for a PC-relative jump. Should I file this as a bug? If no one better suited is willing to look at this soon, I am willing to give it a try. Any suggestions? Look at the x86 llvm backend and how gcc does it? Regards, Andreas

On Fri, Mar 27, 2009 at 3:48 PM, Evan Cheng <evan.cheng at apple.com> wrote: > Run with -debug-only=jit. OT: I take it the recommended model for tools that embed LLVM is for them to accept all of LLVM's command line arguments on their own command lines? For Python, it'd be much nicer to make this stuff tweakable through a module at runtime, or even, for thread-safety reasons, as

Hello, using the LLVM API, I've build one very simple function that adds two ConstantInts and returns the result. I noticed that, when I emit IR code, it is optimized to a simple "ret i16 42" when I add 40 and 2. I'd like to see the operations that are necessary to compute the result, though. Can I somehow disable this optimization in the pass, leading to more verbose IR code?

Chris Lattner wrote: > On Mon, 16 Jun 2008, Gary Benson wrote: > > When you genetate code on PowerPC you need to explicitly > > invalidate the instruction cache to force the processor to reread > > it. In LLVM there is code to do this for function stubs on > > Macintosh, but not for other platforms and not for JITted code > > generally. > > Applied, thanks!

IRBuilder is a templated class, and one of the template arguments is the constant folder to use. By default it uses the ConstantFolder class which does target-independant constant folding. If you want to disable constant folding you can specify the NoFolder class instead, i.e. declare the builder as follows: IRBuilder<true, llvm::NoFolder> builder(body) On 26 Nov 2013, at 19:23, Daniel

I read the tutorial doc and some info of SSA, finally understand it. Thanks for your help. And the segmentation error of loading arguementation occurs, (gdb error info) Program received signal SIGSEGV, Segmentation fault. 0x0855bb68 in llvm::LoadInst::LoadInst(llvm::Value*, char const*, bool, llvm::Instruction*) () code is like follows: //#include necessary header files int main(){

All, The following patch fixes the build breakage on FreeBSD/powerpc: Index: lib/Target/PowerPC/PPCJITInfo.cpp =================================================================== --- lib/Target/PowerPC/PPCJITInfo.cpp (revision 51432) +++ lib/Target/PowerPC/PPCJITInfo.cpp (working copy) @@ -72,7 +72,7 @@ extern "C" void PPC64CompilationCallback(); #if (defined(__POWERPC__) ||

AIX 7.1 & Power5 I have downloaded the llvm source and ran the following steps: 1. ./configure --enable-targets=powerpc 2. gmake Apart from it, i had to make a few changes. i. dladdr code has been commented for the time being and using the default constructor code for that method ii. In Makefile.config, 2 changes were done. +153 # Linker flags. +154 LDFLAGS+=-Wl,-G,-bexpfull +211

Hi, > I know nothing about this, but the failed assertion suggests the PPC > code generator can't cope with a constant that's bigger than > expected at > that point. Have you taken a look at PPCJITInfo.cpp:382? It may shed > some light. It's inside PPCJITInfo::relocate but unfortunately I could not figure out anything from the source. It looks like it's

Hi Adhemerval Zanella, the old JIT infrastructure is going away, to be replaced by "MC-JIT" (try passing -use-mcjit to lli). It sounds like you are working on the old JIT, so I suggest you work instead on getting MC-JIT working on powerpc. Ciao, Duncan. > I am currently working with PPC64 JIT support for LLVM. So far I could make function calls > work by adding function

Hi all, When you genetate code on PowerPC you need to explicitly invalidate the instruction cache to force the processor to reread it. In LLVM there is code to do this for function stubs on Macintosh, but not for other platforms and not for JITted code generally. The attached patch adds support for GNU platforms, but I can't figure out a nice way to call it for all generated code. Can

Hello, I am currently working with PPC64 JIT support for LLVM. So far I could make function calls work by adding function descriptors in 'lib/Target/PowerPC/PPCJITInfo.h' and adding a virtual method at 'LLVM::TargetJITInfo' that is called within 'JITEmitter::finishFunction' just after 'sys::Memory::InvalidateInstructionCache' to update the Global Mapping with