similar to: [LLVMdev] Removing unused global constant

Hi LLVM developers, $ cat hello.c #include <stdio.h> void foo() { } int main(int argc, char *argv[]) {   for (int i = 0; i < 10; i++) {     printf("%d\n", i);   }   return 0; } $ /opt/llvm-svn/bin/clang --version Fedora clang version 6.0.0 (trunk 316308) (based on LLVM 6.0.0svn) Target: x86_64-redhat-linux Thread model: posix InstalledDir: /opt/llvm-svn/bin $

Hi Hal, Thanks for your hint! $ /opt/llvm-svn/bin/opt -S -internalize -internalize-public-api-list=main -globaldce hello3.ll -o hello3.dce.ll    it works :) But I argue that `main` Function should be inserted into ExternalNames by default: Index: lib/Transforms/IPO/Internalize.cpp =================================================================== --- lib/Transforms/IPO/Internalize.cpp 

Hi, I have: ... @.str1 = private unnamed_addr constant [21 x i8] c"Now f is a function\0A\00", align 1 ; Function Attrs: ssp uwtable define i32 @_Z1fv() #2 { entry: %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([21 x i8]* @.str1, i32 0, i32 0)) ret i32 0 } Then I get after trying to erase the function from the module: 511

Hi, Background : I am using rsync to push/sync FTP uploaded files from master server to slave servers. On slaves the full directory path of each file doesn't exist so rsync is unable to sync it and there a no options in rsync to do something like "mkdir -p/install -D -d" on destination before sync file. N.B. I don't want to do a full sync of the root/home directory every time a

Hi, my friends I finally insert the callInst into the hello.bc file.Then I compile the hello.bc to hello.o file and the check.c to check.o file. And I think by link those to .o file togetherI can get the executable ELF file(clang hello.o check.o -o finalfile). But when I link the two objective file, it said "hello.o: In function `main': hello.bc:(.text+0x69): undefined reference to

How do I tell the optimizer that the (dereferenced) value of an i8** parameter is NULL at the start so that it can eliminate the check? I have code like: void test2(void** ex) { printf("go\n"); // does not change *ex } void call2(void** ex); void testeh(void** ex) { // I want to tell the optimizer *ex is null so it can eliminate the first

Your files do not appear to implement the check() function. On Tue, Apr 10, 2012 at 4:57 PM, 15102925731 <zhenkaixd at 126.com> wrote: > Hi, my friends > > I finally insert the callInst into the hello.bc file.Then I compile the > hello.bc to hello.o file and the check.c to check.o file. And I think by > link those to .o file togetherI can get the executable ELF file(clang

Hi, I am trying to print two strings using printf. I have tried various things, but keep getting this error: llc: printf.ll:4:11: error: '@printf' defined with type 'i32 (i8*, ...)*' %1 = call i32 @printf(i8* null, i8*, i8* null) The code is: declare i32 @printf(i8* nocapture readonly, ...) nounwind define i32 @main() nounwind { %1 = call i32

On 23 October 2013 22:41, Vassil Vassilev <vvasilev at cern.ch> wrote: > Hi, > I have: > ... > @.str1 = private unnamed_addr constant [21 x i8] c"Now f is a > function\0A\00", align 1 > ; Function Attrs: ssp uwtable > define i32 @_Z1fv() #2 { > entry: > %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([21 x > i8]* @.str1, i32 0,

Hi, if I have some LLVM code like this: @.str = private unnamed_addr constant [7 x i8] c"in_arr\00", align 1 @.str1 = private unnamed_addr constant [8 x i8] c"in_arr2\00", align 1 @.str2 = private unnamed_addr constant [8 x i8] c"out_arr\00", align 1 ... ... call void (...)* @_Z16fooz(i8* *getelementptr inbounds ([7 x i8]* @.str, i64 0, i64 0)*, i32 0, i32 1024)

Hi there, I'm having trouble getting ExecutionEngine->runStaticConstructorsDestructors(module, true) to actually trigger static destructors in my code. The static constructors however do get called. I don't know if this is an LLVM or Clang issue, from looking at the IR (see below) it looks like the destructor is being tied to cxa_atexit, and I wonder if that is not called by

I just tried adding the cast but it didn't help. I have the feeling that I am overlooking something very obvious, but I can't seem to figure out what it is. Thanks for your suggestion, though. -- Mikael 2013/12/3 Eli Bendersky <eliben at google.com> > > > > On Tue, Dec 3, 2013 at 2:29 PM, Mikael Lyngvig <mikael at lyngvig.org> wrote: > >> Hi,

On Tue, Dec 3, 2013 at 2:29 PM, Mikael Lyngvig <mikael at lyngvig.org> wrote: > Hi, > > I am trying to print two strings using printf. I have tried various > things, but keep getting this error: > > llc: printf.ll:4:11: error: '@printf' defined with type 'i32 (i8*, > ...)*' > %1 = call i32 @printf(i8* null, i8*, i8* null) > > The

On Fri, Sep 9, 2011 at 1:36 PM, Graham Wakefield <wakefield at mat.ucsb.edu> wrote: > Hi there, > > I'm having trouble getting ExecutionEngine->runStaticConstructorsDestructors(module, true) to actually trigger static destructors in my code. The static constructors however do get called. > > I don't know if this is an LLVM or Clang issue, from looking at the IR (see

This code: declare i32 @printf(i8* nocapture readonly, ...) nounwind define i32 @bar(i8* %c, i32 %i) #0 { entry: %call = tail call i32 (i8*, ...)* @printf(i8* %c, i8* %c) ret i32 %call } Is accepted without complaints by close-to-trunk llc on my Ubuntu machine. Eli On Tue, Dec 3, 2013 at 2:58 PM, Mikael Lyngvig <mikael at lyngvig.org> wrote: > I just tried adding the cast but

Hi Welson Sun, > Hi, if I have some LLVM code like this: > > @.str = private unnamed_addr constant [7 x i8] c"in_arr\00", align 1 > @.str1 = private unnamed_addr constant [8 x i8] c"in_arr2\00", align 1 > @.str2 = private unnamed_addr constant [8 x i8] c"out_arr\00", align 1 > ... > ... > > call void (...)* @_Z16fooz(i8* *getelementptr

Whoops... Seems I forgot the asterisk (*) after the cast. Or something. Because I did insert the cast and it didn't work. But NOW it works. Thank you for spending some time on this - and also for presenting the solution. -- Mikael 2013/12/4 Eli Bendersky <eliben at google.com> > This code: > > declare i32 @printf(i8* nocapture readonly, ...) nounwind > > define

Thanks Duncan, Yes, it is a ConstantExpr! Thank you! Now trying to find a clue in ConstantExpr's functions to get that string :-) Regards, Welson On Thu, Jan 26, 2012 at 9:04 PM, Duncan Sands <baldrick at free.fr> wrote: > Hi Welson Sun, > > > Hi, if I have some LLVM code like this: > > > > @.str = private unnamed_addr constant [7 x i8]

I did it !!!! YOU MADE MY DAY !!!!!!!!!!!!!!! -- 祝好！ 甄凯 ------------------------------------------------------------------------------------------------------ 2012-04-10 ------------------------------------------------------------------------------------------------------ Name: 甄凯(ZhenKai) Homepage:http://www.renren.com/262729393 Email: zhenkaixd at 126.com or 846227103 at

Hi, Copying a non-existing file with file.copy creates an empty file > r <- file.copy("non-existing-file", ".") > r [1] TRUE ... and returns TRUE! Now, when used in "vectorized" mode > r <- file.copy(c("toto1", "toto2"), c("dest1", "dest2")) [1] FALSE FALSE file.copy looks much more reasonable,