similar to: [LLVMdev] How can i turn off the optimization of llvm-gcc

Hi all LLVMor, I just tried to compile a simple code and analyze the number of the basic blocks. But after compile, what I got, the bytecode is seems to be optimized bytecode. So the information of basic blocks is not what I expected. I want ot use the code as example to see how some of code optimization methods work. However, after compiling file using llvm test.c -o test, bytecode file

> I can run that pass through opt on the bytecode emitted by gcc frontend > through opt tool. However, I want that Pass1 to be the part of the > actual GCC compiler. I want to know how I can position Pass1 among > other passes /optimizations/ code generations. I had a similar question and Chris recommended that I edit the addPassesToEmitAssembly method. Quoting him: "

Hi, I want to check some properties of linux kernel with llvm, but I don't know how to compile a linux kernel to an llvm's .bc file. I have let llvm's gcc front-end ignore inline assembly by modifying cfrontend/src/gcc/llvm-expand.c, and replace CC/as/ar in the Makefile of the kernel with llvm-gcc/llvm-as/llvm-ar. However, the linux's "make" reports errors:

Hi, I'm able to build the llvm tools on the MinGW platform: burg, fpcmp, tblgen, llvm-as, llvm-dis, opt, gccas, llc, llvm-link, lli, gccld, llvm-stub, analyze and extract. I wonder if these tools are sufficient to start build the cfrontend? Henrik. _________________________________________________________________ Undg� pop-ups med MSN Toolbar - http://toolbar.msn.dk hent den gratis!

Suppose, I have a Pass1 implemented as a subclass of Pass, with source code in the directory of llvm source base( transform/analyze ) I can run that pass through opt on the bytecode emitted by gcc frontend through opt tool. However, I want that Pass1 to be the part of the actual GCC compiler. I want to know how I can position Pass1 among other passes /optimizations/ code generations. e.g if

I am investigating some inlining issue, so I did llvm-gcc aaa.c bbb.c ... nnn.c -o output opt -inline -inline-threshold=xxx < output.bc | llc -march=c > output_inline.c 1) I noticed that even if I set xxx to 0 or even a very small negative number, many functions are eliminated. I am wondering if these functions are inlined by the frontend, or identified as deadcode. For instance,

Might anyone have a FreeBSD binary or suggested modifications to the source to compile one? Thanks, Sean

Hi, I am using LLVM to compile vsftp to native x86 ELF code. One of it's object file (sysdeputil) contains inline asm so cannot be compiled by gcc-3.4 frontend. So I decided to firstly link together the llvm objects and libcrtend and compile it to native .o file and then link it with sysdeputil.o . The Makefile is sth like this: vsftpd: $(OBJS) gccld -r -native -o vsftpd.o $(OBJS)

ymxia at nudt.edu.cn wrote: > Hi, > > I want to check some properties of linux kernel with llvm, but I don't know how to compile a > > linux kernel to an llvm's .bc file. I have let llvm's gcc front-end ignore inline assembly by > > modifying cfrontend/src/gcc/llvm-expand.c, and replace CC/as/ar in the Makefile of the kernel > > with

Hi, I have tried another way: ar rcs libsysdeputil.a sysdeputil.o gccld seems to recognize the file type. However, it stills find unresoved symbols which are actually the functions in sysdeputil.o (can be find out with `nm libsysdeputil.a`) The problem disappears if native gcc/ld tool chain is used. As another test, main.c: ----------------- extern void foo(); int main() { foo(); return

Hi devels, there are two issues concerning invoking optimizations: 1. this document: http://llvm.cs.uiuc.edu/docs/GettingStarted.html is very nice, it would be good though to add in a section An Example Using the LLVM Tool Chain examples on optimization step. 2. If i am not wrong there is no tool, which integrates all steps: llvmgcc->opt->llc into something like llcc (and

On Fri, 2 Jun 2006, Nai Xia wrote: > The Makefile is sth like this: > > vsftpd: $(OBJS) > gccld -r -native -o vsftpd.o $(OBJS) -L/home/xianai/my_projects/llvm/cfrontend/x86/llvm-gcc/lib/ -lcrtend > gcc -o vsftpd vsftpd.o sysdeputil.o `./vsf_findlibs.sh` > > > But the gcc/ld still cannot find the reference to __main. > Do I have to compile crtend to native to

On Sat, 1 May 2004, [koi8-r] "Valery A.Khamenya[koi8-r] " wrote: > there are two issues concerning invoking optimizations: > > 1. > this document: > http://llvm.cs.uiuc.edu/docs/GettingStarted.html > is very nice, it would be good though to add in a section > > An Example Using the LLVM Tool Chain > > examples on optimization step. That's an

On Fri, 2 Jun 2006, Nai Xia wrote: > And the command lines: > > llvm-gcc -c -o main.o main.c > gcc -o foo.o foo.c > ar rcs libfoo.a foo.o > llvm-gcc -Wl,-native main.o -L. -lfoo > > It's *OK* > > Thanks in advance for solving my problem. :) > And I personally think it may possiblely puzzle other users, > maybe it deserves its place in FAQ or in man page for

hi, when i change the OBJ_ROOT and recompile the llvm, it's successful. but run following test, then the error occues: ----------------------------------------------------- [yue at RH9 obj]$ make -C ./test/Programs make: Entering directory `/home/yue/llvm/obj/test/Programs' make[1]: Entering directory `/home/yue/llvm/obj/test/Programs/SingleSource' make[2]: Entering directory

Long Fei wrote: > > I am investigating some inlining issue, so I did > > llvm-gcc aaa.c bbb.c ... nnn.c -o output > opt -inline -inline-threshold=xxx < output.bc | llc -march=c > > output_inline.c I am unsure of whether the LLVM GCC frontend does any inlining. However, I do know that your methods above run the LLVM inlining pass, albeit indirectly. If you use

Hi, I have been looking into the code that generates the LLVM assembly in the LLVM front end, but I am not very sure if at the time that the llvm_c_expand_body_1 function is called, the SSA form was already constructed (each definition dominates all the uses). Can somebody please tell me? Thanks

Cyrille Mescam wrote: > Morning, > > I would like to know if you received my mail with the assembly code > you wanted. > > It not, i'll send it again to you. > > Thanks for your help. > > Regards. > > Cyrille > I've looked into the files you sent me, and it seems that the problem is occuring due to the C library simplication pass (which is run

When I compiled a linux kernel, gccas was used to compile assembly code. But gccas cannot recognize the line comment character "#" of gnu assembler, and abort the compile with reporting a error "syntax error, unexpected $undefined". I watch llvm/tools/gccas, but donot known how to add this function in it. Would you give me some suggestions? Thanks.

gccld: Cannot find linker input file 'crtend.o I have set the LLVM_LIB_SEARCH_PATH ls -l $LLVM_LIB_SEARCH_PATH total 104 -rw-r--r-- 1 muj20 muj20 12788 Dec 7 17:05 crtend.o -rw-r--r-- 1 muj20 muj20 1984 Dec 7 17:05 libc.bc -rw-r--r-- 1 muj20 muj20 120 Dec 7 17:05 libcurses.bc