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Hi, I just came across a rather annoying behavior with llvm 3.9. Assuming the following samle code in test.ll: ; Lets have some global int x = 4 @x = global i32 10, align 4 ; and two strings "p = %d\n" for the prefix data, ; as well as "x = %d\n" to print the (global) x value. @.str = private unnamed_addr constant [8 x i8] c"x = %d\0A\00", align 1 @.str2 = private

That is in theory what omitting the .subsections_via_symbols directive is supposed to do, but in an experiment I ran a year or two ago I found that the Mach-O linker was still dead stripping on symbol boundaries with this directive omitted. In any case, a more precise approach has more recently (~a few months ago) become possible. There is a relatively new asm directive called .altentry that, as

> On Mar 6, 2017, at 7:56 PM, James Y Knight via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > Oh, that's great that it's possible to implement properly, now. Does it actually work for > > It'd be cool if LLVM hooked up its generic section handling support to this feature now, so that the only global symbols that *didn't* get marked as .alt_entry were

On Mon, Mar 6, 2017 at 5:54 PM, Moritz Angermann <moritz.angermann at gmail.com > wrote: > Hi Peter, > > I’ve just experimented with this a bit: > > Say we would end up with the following assembly: > > .section __TEXT,__text > .globl _main > > .long 1 > _main: > inc %eax > ret > > .globl _main.dsp > .alt_entry _main.dsp

This is a very fascinating discussion topic. I find I run into some fundamental differences in interpretation of the phrase "statistical computing". I think of it as writing programs or functions, such as R or packages in R, and of understanding the numerical analysis behind these functions. I exclude USING computer programs, such as R, for data analysis from my definition of

Firstly, do you need "main.dsp" defined as an external symbol, or can all external references go via "main"? If the answer is the latter, that will make the solution simpler. If only the latter, you will need to make a change to LLVM here: http://llvm-cs.pcc.me.uk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp#650 Basically you would need to add a hook to the TargetLoweringObjectFile

I suspect that the format isn't important if you do that, but I wouldn't recommend it, at least because inlining (and other inter-procedural optimizations) are not expected to work correctly if you produce IR like that. Peter On Mon, Mar 6, 2017 at 6:44 PM, Moritz Angermann <moritz.angermann at gmail.com > wrote: > Peter, > > thanks again! Yes, we only need to refer to