[PATCH] D137217: [LTO][COFF] Use bitcode file names in lto native object file names.

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added inline comments.


================
Comment at: lld/COFF/LTO.cpp:229
+    StringRef ltoObjName;
+    if (bitcodeFilePath == "ld-temp.o") {
+      ltoObjName =
----------------
MaskRay wrote:
> tejohnson wrote:
> > zequanwu wrote:
> > > tejohnson wrote:
> > > > This case should always be i==0 I think?
> > > IIUC, "ld-temp.o" is the name of combined module. Do you mean there will be only 1 combined module and it will always be the first task?
> > Yes. So you don't need the handling for i==0 in the name in this case (you could probably assert that i==0).
> This looks like a hack. `assert(i == 0)` will fail with `-opt:lldltopartitions=2`: `buf[1]` will be called `ld-temp.o` as well.
> 
> In addition, if an input bitcode file is called `ld-temp.o` (for some reason they don't use `.obj`, just `ld-temp.o`), `assert(i == 0)` will fail as well.
I guess `if (i < config->ltoPartitions)` may fix the issue.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137217/new/

https://reviews.llvm.org/D137217