similar to: [LLVMdev] View variable-register map

On Fri, Jan 21, 2011 at 2:48 PM, Vijayaraghavan Murali <m.vijay at nus.edu.sg> wrote: > I just wish to know if other than manually comparing the llc generated > code with the source program, is there any other way of knowing which > variables in the program are mapped to which registers? I was not able > to find any suitable option for the same, so I'm wondering if there is a

Thank you Frits! I noticed the following lines in the dwarf output (run with -O2): .uleb128 40 # Offset .byte 134 # DW_CFA_offset + Reg (6) .uleb128 4 # Offset .byte 135 # DW_CFA_offset + Reg (7) .uleb128 3 # Offset .byte 131 # DW_CFA_offset + Reg (3)

Hello, I'm relatively a newcomer to this forum and LLVM. I wish to do the following: 1) play with LLVM's register allocation without any other optimizations performed, such as inlining. This is because I'm trying to observe the effects of our path-sensitive tool on register allocation but other optimizations could influence the results. In other words, I would like to perform

Hi, I'm trying to get exception handling working in my compiler targetting LLVM. I've been working from the LLVM exception handling documentation (including http://llvm.org/docs/ExceptionHandling.html and http://wiki.llvm.org/HowTo:_Build_JIT_based_Exception_mechanism) and looking at g++-llvm's output. I've been trying to get a minimal test function to work, which simply invokes

Hi James, > I've been trying to get a minimal test function to work, which simply > invokes _Unwind_RaiseException with a single clean-up landing pad. > However. when I run it my personality function is not getting called - > _Unwind_RaiseException simply returns apparently doing nothing. Looking > at the x86-64 assembly output from llc, I can see this is happening >

2010/1/22 Duncan Sands <baldrick at free.fr> > Hi James, > > > I've been trying to get a minimal test function to work, which simply >> invokes _Unwind_RaiseException with a single clean-up landing pad. However. >> when I run it my personality function is not getting called - >> _Unwind_RaiseException simply returns apparently doing nothing. Looking at

Hey everybody! I have been using llvm 2.8 (i know ancient history!) for a backend that i was implementing. I have been trying to port my patches to latest llvm (svn build) lately but i have one problem as far as the Exception Handling mechanism is concerned. It seems that there are no Exception Tables generated any more such as the one below: .section .gcc_except_table,"a", at

Hi Yiannis, > I have been using llvm 2.8 (i know ancient history!) for a backend that i was > implementing. I have been trying to port my patches to latest llvm (svn build) > lately but i have one problem as far as the Exception Handling mechanism is > concerned. It seems that there are no Exception Tables generated any more such > as the one below: got some example bitcode for

hi: maybe this should not be here! the test code: eh3.cpp int main() { try { throw 34; } catch (int) { } catch (char) { } catch (bool) { } } compile with g++ -S -dA eh3.cpp -o eh3.s the except table of the eh3.s 106 .section .gcc_except_table,"a", at progbits 107 .align 4 108 .LLSDA2: 109

On 09/02/2011 05:58 PM, Duncan Sands wrote: > Hi Yiannis, > >> I have been using llvm 2.8 (i know ancient history!) for a backend that i was >> implementing. I have been trying to port my patches to latest llvm (svn build) >> lately but i have one problem as far as the Exception Handling mechanism is >> concerned. It seems that there are no Exception Tables generated

Hello, I have running xen over a debian server (debian sarge). Now I would like to configure a domU with redhat (AS 4), do you now any way to install it? -- Angel L. Mateo Martínez Sección de Telemática Área de Tecnologías de la Información _o) y las Comunicaciones Aplicadas (ATICA) / \\ http://www.um.es/atica _(___V Tfo: 968367590 Fax: 968398337

Hi Duncan et al, Our linker guy brought up a problem with how we pad out our exception tables. Right now we pad them out like this: .section __DATA,__gcc_except_tab .align 2 GCC_except_table13: .byte 0x0 #< --- hun? .byte 0x0 #< --- hun? Lexception13: .byte 0xFF .byte 0x0 .byte 0xB2, 0x1 > Here are his comments: The problem is that the linker parses FDE which gives it

On Feb 5, 2010, at 4:00 PM, Duncan Sands wrote: > Hi Bill, > >> It looks like your goal is to keep the 32-bit pointers in the call-site table 4-byte aligned. Here is another solution, instead of having two labels at the start of the LSDA (with pad bytes between them), have no pad bytes and instead use an unnormalized uleb128 for the call-site table length. By unnormalized, I mean one

Bill, ooops, yes, I described the meaning of "throw(A)" backwards, but I still think my example shows why you cannot merge LandingpadInst while inlining because multiple filter-lists on a LandingpadInst don't make sense. Perhaps I'm reading your original spec wrong, perhaps I'm mis-reading Duncan's emails, but I read them to mean that your syntax supports

Hi, I'm investigating the size of Clang's generated binaries relative to GCC, when targeting Android, and I've noticed that Clang's exception tables are much larger -- the .ARM.extab section is about 2.5 times as large in two examples. I noticed a couple of differences between Clang and GCC: 1. *ULEB128 encoding.* In the call site table, GCC encodes offsets using a ULEB128

Hi everyone, Here's a patch that enables exception handling when jitting. I've copy/pasted _many_code from lib/Codegen/DwarfWriter.cpp, so we may need to factorize it, but the functionality is there and I'm very happy with it :) lli should now be able to execute the output from llvm-gcc when using exceptions (the UnwindInst instruction is not involved in this patch). Just add the

Motivation: Many optimizations duplicate code. E.g. loop unroller duplicates the loop body, GVN duplicates computation, etc. The duplicated code will share the same debug info with the original code. For SamplePGO, the debug info is used to present the profile. Code duplication will affect profile accuracy. Taking loop unrolling for example: #1 foo(); #2 for (i = 0; i < N; i++) { #3 bar();

On Mon, Feb 28, 2011 at 5:10 PM, John Criswell <criswell at illinois.edu> wrote: > On 2/28/11 10:04 AM, Frits van Bommel wrote: >> I don't think a full clone is necessary, since he wants to replace the >> function. He only needs to create the new function and splice in the >> body of the old one. > > That is exactly what MakeFunctionClone() does.  It creates a

Hi, > maybe this should not be here! does this have anything to do with LLVM? > int main() > { > try { > throw 34; > } > catch (int) { > } > catch (char) { > } > catch (bool) { > } > } The action is 0x5, this refers to 123 .byte 0x3 124 .byte 0x7d where 0x3 means that the typeinfo

Michael Smith wrote: > On Sun, 09 Jan 2005 18:15:26 +0100, Frits Letteboer > <graver@graver.xs4all.nl> wrote: > >>Hi, >> >>I'm currently migrating from Shoutcast/MP3 to Icecast/OGG/Vorbis using ices. >> >>Unfortunately, when initialising the encoder, ices crashes with a bus error. > > > It looks from the gdb output that