[llvm-dev] Is it possible to generate the IR representation with the original macro information?

[David Blaikie via llvm-dev]

-g -fdebug-macro will include macro info in the debug info in the IR. It
doesn't track which bits of IR were expanded from macros (anymore than the
source locations do without -fdebug-macro) - just provides the macro text
so, for instance, debugger users can use the macros in expresions.

On Fri, Jan 18, 2019 at 2:43 PM Peng Yu via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi,
>
> I use the following commands to compile the IR. But I don't see the
> macro information in the .ll file. Is there a way to preserve the
> macro information (print() in this case) for debugging purposes?
>
> $ clang -std=gnu99 -g3 -flto -Wall -pedantic -c -o main.o main.c
> $ clang main.o -flto -fuse-ld=gold '-Wl,-plugin-opt=save-temps' -o main.exe
> $ llvm-dis main.exe.0.0.preopt.bc
>
> /* vim: set noexpandtab tabstop=2: */
> #include <stdio.h>
>
> #define print() puts("Hello World!");
>
> int main() {
>     print();
>     return 0;
> }
>
> --
> Regards,
> Peng
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> llvm-dev at lists.llvm.org
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