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Icmp sgt is correct. Note that "ugt x, 0" is the same as "x != 0" which is not what you want. -Chris On Aug 1, 2011, at 9:11 AM, Jonas Gefele <llvm.org at schrieb.de> wrote: > Hello, > > while writing a new LLVM backend I have observed that in some cases the > optimizer produces an "icmp sgt i32 %a, 0" where I would have expected an > "icmp ugt i32 %a, 0". > > For example when I feed &quo...

Hello, while writing a new LLVM backend I have observed that in some cases the optimizer produces an "icmp sgt i32 %a, 0" where I would have expected an "icmp ugt i32 %a, 0". For example when I feed "opt -O3 -S ..." (LLVM 2.9, Windows) with ------------------------------------------------------------------------ target datalayout = "E-p:32:32:32"

...everything to a single call during instruction selection, and then write a machine function pass that translates the normal CALL's into CALL_NATIVE? Micah > -----Original Message----- > From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] > On Behalf Of Jonas Gefele > Sent: Thursday, August 04, 2011 9:56 AM > To: llvmdev at cs.uiuc.edu > Subject: [LLVMdev] LLVM backend: Treat some function calls specially > > Hello, > > I am writing an LLVM backend that generates byte code for a custom > virtual > machine. Standard function calls a...

Hello, I am writing an LLVM backend that generates byte code for a custom virtual machine. Standard function calls are lowered to a simple CALL $offsetInByteCode This works fine so far using the standard machinery of LLVM. But some functions are not implemented in byte code, but delegated to native implementations within the VM. Calls to these functions use a non-standard calling convention

Hi. I am interested in using the CBackend of LLVM. I have read about the problems with the current version and that David Greene has started a reimplementation. Can you tell me about its current state? Furthermore, I use Microsoft Visual Studio. The "Getting started with MVC" documents for release 2.8 say "To emphasize, there is no C/C++ front end currently available" but

...is false and control branches to %if.end. The GEP does have an inbounds attribute, I'm not sure if that is relevant here. Ciao, Duncan. Note that "ugt x, 0" is the same as "x != 0" which is not what you want. > > -Chris > > On Aug 1, 2011, at 9:11 AM, Jonas Gefele<llvm.org at schrieb.de> wrote: > >> Hello, >> >> while writing a new LLVM backend I have observed that in some cases the >> optimizer produces an "icmp sgt i32 %a, 0" where I would have expected an >> "icmp ugt i32 %a, 0". >> >&gt...

Hello, I am interested in using (parts) of LLVM/clang in my Visual Studio project. I don't want the resulting VS project file(s) to depend on CMAKE. A (fairly old) thread on CMAKE mailing list says it is not supported by CMAKE to generate CMAKE-independent VS projects (http://www.mail-archive.com/cmake at cmake.org/msg16634.html). So, does anyone here know a better way to achieve this than

Hi Peter, (I'm CC'ing the LLVMdev list as there might be others able to help you) I don't know this assertion, so can't help you with that particular problem. But concerning "more debug info": Do you know the following two links? http://llvm.org/releases/3.0/docs/ProgrammersManual.html#DEBUG You can find some example debug code e.g. in method Select(SDNode *Node) in