Lorenzo Laneve via llvm-dev
2016-Mar-19 00:03 UTC
[llvm-dev] Need help with code generation
I wrote my compiler and now it generates LLVM IR modules. Now i’d like to go ahead and make object file and then executable, just like clang does. What should I have to use to create the object files? and then how do I call the ld? (not llvm-ld, I want my compiler to work like Clang and I read that Clang doesn’t use llvm-ld).
If you've created a .bc or a .ll file then the simplest thing is to just give it to clang exactly the same as you would for a .c file. Clang will just Do The Right Thing with it. If you don't want to link, then pass flags such as -c to clang as usual. e.g. ---- hello.ll ---- declare i32 @puts(i8*) @str = constant [12 x i8] c"Hello World\00" define i32 @main() { %1 = call i32 @puts(i8* getelementptr inbounds ([12 x i8]* @str, i64 0, i64 0)) ret i32 0 } ---------------- $ clang hello.ll -o hello && ./hello warning: overriding the module target triple with x86_64-apple-macosx10.10.0 1 warning generated. Hello World On Sat, Mar 19, 2016 at 3:03 AM, Lorenzo Laneve via llvm-dev < llvm-dev at lists.llvm.org> wrote:> I wrote my compiler and now it generates LLVM IR modules. Now i’d like to > go ahead and make object file and then executable, just like clang does. > > What should I have to use to create the object files? and then how do I > call the ld? (not llvm-ld, I want my compiler to work like Clang and I read > that Clang doesn’t use llvm-ld). > _______________________________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20160319/fef015f9/attachment.html>
Lorenzo Laneve via llvm-dev
2016-Mar-19 12:31 UTC
[llvm-dev] Need help with code generation
I'd like to make my compiler independent, just like Clang. Doesn't Clang call llc and then system's ld by itself? I don't want my compiler to depend by any other program. I guess there will be a class in the llvm library that generates the object files based on the system's triple and data layout, and then call the system's ld?> On Mar 19, 2016, at 11:48 AM, Bruce Hoult <bruce at hoult.org> wrote: > > If you've created a .bc or a .ll file then the simplest thing is to just give it to clang exactly the same as you would for a .c file. Clang will just Do The Right Thing with it. > > If you don't want to link, then pass flags such as -c to clang as usual. > > e.g. > > ---- hello.ll ---- > declare i32 @puts(i8*) > @str = constant [12 x i8] c"Hello World\00" > > define i32 @main() { > %1 = call i32 @puts(i8* getelementptr inbounds ([12 x i8]* @str, i64 0, i64 0)) > ret i32 0 > } > ---------------- > > $ clang hello.ll -o hello && ./hello > warning: overriding the module target triple with x86_64-apple-macosx10.10.0 > 1 warning generated. > Hello World > > >> On Sat, Mar 19, 2016 at 3:03 AM, Lorenzo Laneve via llvm-dev <llvm-dev at lists.llvm.org> wrote: >> I wrote my compiler and now it generates LLVM IR modules. Now i’d like to go ahead and make object file and then executable, just like clang does. >> >> What should I have to use to create the object files? and then how do I call the ld? (not llvm-ld, I want my compiler to work like Clang and I read that Clang doesn’t use llvm-ld). >> _______________________________________________ >> LLVM Developers mailing list >> llvm-dev at lists.llvm.org >> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20160319/7aff0d78/attachment.html>