Displaying 20 results from an estimated 5000 matches similar to: "[LLVMdev] writing an llvm pass"
2010 Nov 01
2
[LLVMdev] Identify recursion in a call graph
On Oct 30, 2010, at 4:38 AM, Duncan Sands wrote:
>> Is there any facility in LLVM to identify recursion in a call graph?
...
> use the facilities in SCCIterator.h, or declare your pass to be a
> CallGraphSCCPass in which case it will work one strongly connected
> component at a time.
Converting my ModulePass to a CallGraphSCCPass doesn't seem feasible,
so I'll use
2010 Jul 16
2
[LLVMdev] Function::getName in CallGraphSCCPass causes bus error
Hi,
I'm trying to use CallGraphSCCPass, but I keep getting a bus error. I
can reproduce the problem quite easily using the lib/Transforms/Hello
example. I simply mix in these changes:
#include "llvm/CallGraphSCCPass.h"
...
struct Hello : public CallGraphSCCPass {
static char ID; // Pass identification, replacement for typeid
Hello() : CallGraphSCCPass(&ID) {}
2010 Nov 02
0
[LLVMdev] Identify recursion in a call graph
Hi Trevor,
> Converting my ModulePass to a CallGraphSCCPass doesn't seem feasible, so I'll
> use llvm::scc_iterator. Here's what I have so far:
>
> bool MyModulePass::isRecursive() {
> CallGraphNode* rootNode = getAnalysis<CallGraph>().getRoot();
> for (scc_iterator<CallGraphNode*> SCCI = scc_begin(rootNode), E =
> scc_end(rootNode); SCCI != E; ++SCCI)
2010 Jul 19
0
[LLVMdev] Function::getName in CallGraphSCCPass causes bus error
Hi Trevor,
> struct Hello : public CallGraphSCCPass {
> static char ID; // Pass identification, replacement for typeid
> Hello() : CallGraphSCCPass(&ID) {}
> virtual bool runOnSCC(std::vector<CallGraphNode *> &SCC) {
> CallGraphNode *node = SCC.front();
> Function *function = node->getFunction();
>
2010 Nov 02
2
[LLVMdev] Identify recursion in a call graph
Hi you basically need to find a cycles in the call graph. Do do this just
search google for a graph algorithm, then make it for your problem. See
http://en.wikipedia.org/wiki/Cycle_detection.
Jeff Kunkel
On Tue, Nov 2, 2010 at 4:27 AM, Duncan Sands <baldrick at free.fr> wrote:
> Hi Trevor,
>
> > Converting my ModulePass to a CallGraphSCCPass doesn't seem feasible, so
>
2006 Sep 18
2
[LLVMdev] llvm-g++: Internal error
Hi,
i used CVS to checkout the source of llvm and llvm-gcc, compiled and built
them on my machine successfully.
i tried a c-language hello program, it was OK.
But when i tried a c++-language hello program, i got:
~/project/llvm/examples$ llvm-g++ t3.cc -o t3
gccld:
/developer/zsth/project/llvm/src/llvm/lib/Analysis/IPA/CallGraph.cpp:277:
void
2010 Nov 02
0
[LLVMdev] Identify recursion in a call graph
Also, could you write this in a separate pass, and obtain the results from
getAnalysis()? I think others would find it useful to discover if a Function
may be called recursively.
-Jeff Kunkel
On Tue, Nov 2, 2010 at 2:38 PM, Jeff Kunkel <jdkunk3 at gmail.com> wrote:
> Hi you basically need to find a cycles in the call graph. Do do this just
> search google for a graph algorithm, then
2006 Sep 14
1
[LLVMdev] use LLVM to convert C++ code to C code
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Hi,<br>
I am newbie to llvm.<br>
<br>
I am unable to generate
2011 Jan 25
1
[LLVMdev] Can CallGraphSCCPass distinguish different function pointer types in CallGraphNode?
Dear folks,
I am trying to handle function pointers at call graph, and I found that
the CallGraphSCCPass makes function pointers as external node, which is
actually an empty CallGraphNode (NULL pointer)?
If I want to distinguish the function pointer types in the call graph
(and I also want the SCC order in CallGraphSCCPass), can I do that easily?
Or I have to inheritate the
2013 Sep 23
0
[LLVMdev] Cannot get Alias Analysis?
Hi,
I am trying to write my own command-line tool which would use alias
analysis in a CallGraphSCCPass.
Firstly, I inherit a class AnalysisDriver from CallGraphSCCPass.
Then, I implement my own runOnFunction method which tries to get alias
analysis from each function.
The code is shown as follows:
*class AnalysisDriver : public CallGraphSCCPass {*
* static char Pid;*
* PassManager
2011 Nov 30
0
[LLVMdev] Fwd: Problem getting LoopInfo inside non-LoopPass
The following code is causing an "UNREACHABLE executed!" and a stack dump,
any ideas?
namespace {
struct myPass : public CallGraphSCCPass {
static char ID;
myPass() : CallGraphSCCPass(ID) {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequired<LoopInfo>();
}
virtual bool runOnSCC(CallGraphSCC &SCC)
2006 Dec 01
1
[LLVMdev] DSGraph::computeCalleeCallerMapping failing
I was trying to call "DSGraph::computeCalleeCallerMapping" function on all caller-calle pair. But, in one case it gives an assertion failure. This is the error message I get.
Processing internal callee function rt_error
opt: /localhome/ssahoo2/llvm/src/lib/Analysis/DataStructure/DataStructure.cpp:2248: static void llvm::DSGraph::computeNodeMapping(const llvm::DSNodeHandle&, const
2011 Nov 30
2
[LLVMdev] Fwd: Problem getting LoopInfo inside non-LoopPass
On Tue, Nov 29, 2011 at 6:59 PM, Ryan Taylor <ryta1203 at gmail.com> wrote:
> The following code is causing an "UNREACHABLE executed!" and a stack dump,
> any ideas?
The stack might be handy.
> namespace {
> struct myPass : public CallGraphSCCPass {
> static char ID;
> myPass() : CallGraphSCCPass(ID) {}
> virtual void getAnalysisUsage(AnalysisUsage
2011 Nov 30
0
[LLVMdev] Fwd: Problem getting LoopInfo inside non-LoopPass
UNREACHABLE executed!
0 opt 0x00000000008edc2f
1 opt 0x00000000008edfda
2 libpthread.so.0 0x00007f9c8e69bc60
3 libc.so.6 0x00007f9c8d986d05 gsignal + 53
4 libc.so.6 0x00007f9c8d98aab6 abort + 390
5 opt 0x00000000008da974 llvm::llvm_unreachable_internal(char
const*, char const*, unsigned int) + 356
6 opt 0x000000000087e046
7 opt
2015 Feb 27
0
[LLVMdev] Walking thru CallGraph bottom up
Dear Simon,
Kevin is correct; as far as I can tell, there is no method of getting
the functions calling a given function. Instead, you have to start at
the main() function and search for the function using a depth-first or
breadth-first search.
What may make sense is to build a new data structure that has nodes that
point from callees to callers once and then use that for your queries.
2011 Oct 19
1
[LLVMdev] CallGraphSCCPass
I'm building a SCCPass below, it appears that the CallGraphNode->getFunction
returns a valid function but seg faults on call like "getName" or "size" but
not on calls like "empty" (which returns false).
My understanding is that the heirarchy is:
CallGraphSCC->CallGraphNode->Function->BasicBlock->Instruction, is this not
the case?
virtual bool
2011 Dec 01
1
[LLVMdev] Problem getting LoopInfo inside non-LoopPass
In addition to the link below, please check for functions like "llvm.debug.declare", "llvm.debug.value", as you will not get LoopInfo for these.
Pankaj
________________________________
From: Devang Patel <dpatel at apple.com>
To: Ryan Taylor <ryta1203 at gmail.com>
Cc: llvmdev at cs.uiuc.edu
Sent: Wednesday, November 30, 2011 11:08 PM
Subject: Re: [LLVMdev]
2011 Dec 01
0
[LLVMdev] Problem getting LoopInfo inside non-LoopPass
Thanks for the info. Curious, do you know if there is an opt that will put
all loops, including nested ones, in functions (ie each loop in it's own
function)? What I'm trying to do is create a way for each loop to have only
one exit. I want all loops to be single exit loops?
I can write my own pass but I'd rather not. I think that if I can put
each loop into it's own function
2015 Feb 27
2
[LLVMdev] Walking thru CallGraph bottom up
Hi Simon,
> From: Simone Atzeni <simone.at at gmail.com>
> To: John Criswell <jtcriswel at gmail.com>
> Cc: llvmdev at cs.uiuc.edu
> Subject: Re: [LLVMdev] Walking thru CallGraph bottom up
> Message-ID: <318EBA41-2040-4EFE-B330-5813C817C2A2 at gmail.com>
> Content-Type: text/plain; charset="windows-1252"
>
> I think I got it and the example is
2009 Jun 08
3
[LLVMdev] debug information for functions
Suppose I have fun.h as:
static void fun() {
int a =10;
}
Now I have two files foo.c and goo.c as
foo.c :
#include "fun.h"
void foo()
{
fun();
}
goo.c:
#include "fun.h"
void goo()
{
fun();
}
I get .bc files for foo.c and foo.bc through clang. Now I run llvm-ld
with -disable-opt for foo.bc and goo.bc. In the resulting .bc files, one
of the