similar to: [LLVMdev] Regression (sort of) in LLVM 2.8 with opt and --enabled-shared

On Feb 9, 2010, at 11:13 AM, Trevor Harmon wrote: > Is there any information about these changes and why they were > necessary? I think I found it: http://nondot.org/~sabre/LLVMNotes/EmbeddedMetadata.txt Still looking for an API to access the metadata... Trevor

On Feb 8, 2010, at 8:51 PM, Duncan Sands wrote: > this can be done using debug info. Check out > http://llvm.org/docs/SourceLevelDebugging.html Wow, that threw me for a loop. I'm using the 2.6 release, thinking I was up to date, but its debug output doesn't look anything like what's described in the above link. It appears to document the upcoming 2.7 version, which

LLVM has a relatively large number of proprietary replacements for standard C++ functions and classes. One of these is dyn_cast to replace dynamic_cast. The two calls appear to be semantically equivalent; the only difference that I can see is that dyn_cast reportedly works on classes that have no v-table [1]. Could someone please explain why I should use dyn_cast instead of dynamic_cast?

Trevor Harmon <Trevor.W.Harmon at nasa.gov> writes: [snip] > Could someone > please explain why I should use dyn_cast instead of dynamic_cast? (I > thought all classes have v-tables...) Thanks, For reducing executable size, LLVM builds with RTTI disabled where possible.

On Mar 30, 2010, at 7:51 PM, John Criswell wrote: > I'm too lazy to convert your .dot file into a graph file What format should I have posted? (I'm not sure what you mean by "graph file".) I had thought that .dot was the preferred format here, since that's what LLVM generates (e.g., "opt -dot-cfg ..."). > First, LLVM does not guarantee that a function

On Wed, Mar 31, 2010 at 2:59 PM, Trevor Harmon <trevor.w.harmon at nasa.gov> wrote: > I'm wondering what would cause a CFG not to have a return block. The > comments in UnifyFunctionExitNodes.cpp say: "If there are no return > stmts in the Function, a null pointer is returned." But this doesn't > make sense; even an empty void function has a return block with a

On Nov 2, 2010, at 11:08 PM, Nick Lewycky wrote: > The unittests/ directory contains C++ unit tests for arbitrary C++ > APIs > that don't fit the dejagnu model of running opt or llc over .ll files. Thanks for the tip. Attached is a patch+testcase that adds CallGraphNode::isRecursive to LLVM. Could someone with commit access please review and apply? Thanks, Trevor

On 16 February 2010 20:49, Trevor Harmon <Trevor.W.Harmon at nasa.gov> wrote: > We were discussing that a few days ago: > > http://lists.cs.uiuc.edu/pipermail/llvmdev/2010-February/029245.html Hi Trevor, On a similar question, I'd want to see what line is being compiled to which instructions. Is it possible to print the before the instructions as comment? For example:

On Nov 12, 2010, at 5:57 PM, Óscar Fuentes wrote: >> Could someone >> please explain why I should use dyn_cast instead of dynamic_cast? (I >> thought all classes have v-tables...) Thanks, > > For reducing executable size, LLVM builds with RTTI disabled where > possible. Right, but how does that relate to dyn_cast? I thought v-tables were present even when RTTI is not

On Wed, Oct 20, 2010 at 7:19 PM, Jim Grosbach <grosbach at apple.com> wrote: > > On Oct 20, 2010, at 5:16 PM, Trevor Harmon wrote: >> I'm writing a pass that does some static analysis on C code. A >> critical requirement of the pass is that it must preserve not only the >> correctness of the code but also its timing -- It cannot add or remove >> even one CPU

Hi, I'm developing an LLVM pass and am running into code maintenance issues. Specifically, the "Writing an LLVM Pass" document assumes that the pass directory is placed somewhere in the LLVM source base (e.g. lib/Transforms), but this is a problem for me because: 1) Testing the pass against two different LLVM versions is difficult. For example, testing with the LLVM 2.6

Hi, For me, getTripCount always returns null, even for trivial loops such as: void simple(int j) { for (int i = 0; i < 10; i++) { j++; } } Looking through the mailing list archive, it appears that getTripCount requires certain optimization passes to run first, but it's not clear which ones. There doesn't seem to be any documentation on this. Does anybody

Hi, I'm confused about the is_analysis parameter of the RegisterPass constructor (defined in PassSupport.h). The only explanation I can find is that is_analysis should be set to true if the pass is "an analysis pass, for example dominator tree pass". Can someone please clarify what is meant by "analysis pass"? Also -- and this is more of a C++ question than an

Hi, I'm trying to learn all that I can about exception handling from the compiler's point of view. Although much has been written about compiler theory in general -- parsing, code generation, you name it -- I can find almost nothing on the specific problem of exception handling support. In fact, the most informative document I've been able to find so far is "Bill's

On Apr 5, 2010, at 7:10 PM, funceval wrote: > opt -load ../../../Release/lib/iel.so > <premain>: CommandLine Error: Argument 'inline-threshold' defined > more than once! > opt: CommandLine Error: Argument 'inline-threshold' defined more > than once! > Error opening '../../../Release/lib/iel.so': ../../../Release/lib/ > iel.so: undefined

On Apr 21, 2010, at 7:31 AM, khaled hamidouche wrote: > I'm wandring to know how many times a block is executed inside a > loop ? > knowing that I can't use getSmallConstantTripCount() because the > number is unkown "for (i=0;i<N;i++) for example" In general, the number of iterations is undecidable. For example: int main(char **argv, int N) { for

On Oct 20, 2010, at 5:26 PM, Kenneth Uildriks wrote: > You could always undo the split right before your pass finishes. How would I undo a split? Perhaps by merging them back using llvm::MergeBlockIntoPredecessor? Trevor

On Nov 21, 2010, at 12:16 PM, pcmnac++ wrote: > I just called "sudo make" inside "llvm/examples/fibonacci/", what > generated a directory named "Release" containing 2 files: > fibonacci.d and fibonacci.o. How can I generate a binary executable > file from those ones? The executable was placed in llvm/Release/examples. > Where can I find a

On Feb 13, 2010, at 7:22 AM, Jingyue Wu wrote: > I would like to know how to locate an LLVM instruction in the source > code, i.e. to get the line number of its corresponding source code > statement. I remember in LLVM 2.4, DbgStopPointInst is designed to > help this locating, but it seems deprecated in the latest LLVM. We were discussing that a few days ago:

On Apr 30, 2010, at 7:54 AM, mike-m wrote: > I'm not sure how the project/community feels about collab-diagrams. > I find them exceedingly large and rarely useful. There are a couple > of options if changes in that area are desired: (1) disable collab- > diagrams. (2) make both class-inheritance and collab-diagrams hidden > under a javascript-knob which users can click