rnk added inline comments.
================
Comment at: clang/include/clang/Basic/CodeGenOptions.h:212
+ /// Output filename used in the COFF debug information.
+ std::string COFFOutputFilename;
+
----------------
aganea wrote:
> rnk wrote:
> > Let's bikeshed the name a bit. This thing is the `-o`/`/Fo` value, plus
> > some processing. It can be symbolic, as in `-`. It could be the name of a
> > bitcode file with `-flto`. It could be the name of an assembly file if you
> > do `clang -S --target=x86_64-windows-msvc -g t.cpp -o t.s`. It could be the
> > name of an ELF file if you try hard. I think in any of these cases where
> > the user directly emits something that isn't a COFF object, it's OK to use
> > that name for the S_OBJNAME record.
> >
> > What it is, is the name of the compiler's output file, as we would like it
> > to appear in debug info. With that in mind, here are some ideas:
> > - CodeViewObjectName: very directly referring to S_OBJNAME
> > - ObjectFilename: very general
> > - ObjectFilenameForDebug: generalizing over cv/dwarf
> > - OutputFilenameForDebug: generalizing over assembly, bc, and obj
> >
> > I think I like ObjectFilenameForDebug best. DebugObjectFilename seems like
> > a no-go, since that sounds like the dwo file name.
> >
> > ---
> >
> > This brings me to the case of `-save-temps` / `/Fa`. In these cases, the
> > compile action is broken into pieces, and the assembler is invoked in a
> > follow-up process. Does that mean the driver needs to pass an extra flag
> > along to the -cc1 action? That would be a bummer.
> >
> I think we should fix `-save-temps` and `/Fa`, thanks for raising that! Would
> you mind if I added a new cc1 flag for that purpose? Something like
> `-target-file-name`.
> When using `-save-temps`, each cc1 command doesn't know about the final
> filename, except for the last cc1 command. We would need to provide that name
> somehow when passing `-S`.
Yes, I think we'll need a new cc1 flag. I'd avoid "target" in the flag name,
since it makes me thing of target as in platform, OS, ISA, etc. Maybe just
-object-file-name? It's very boring, and reasonably specific.
================
Comment at: llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp:752
+static void unescapeSlashes(SmallVectorImpl<char> &Str) {
+ auto Read = Str.begin();
----------------
aganea wrote:
> rnk wrote:
> > This isn't unescaping them, it's just canonicalizing double slashes to one
> > slash, right? Would `llvm::sys::native` suffice?
> `llvm::sys::path::native()` doesn't remove consecutive (back)slashes. I think
> @zturner's main intent was when debugging in Visual Studio with arguments
> from LIT tests, they sometimes contain double backslashes.
I see. I think "unescape" shouldn't be in the name, this isn't about escape
characters, it's about cleaning up or canonicalizing the path.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D43002/new/
https://reviews.llvm.org/D43002
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