[PATCH] D119026: [HIP] Emit amdgpu_code_object_version module flag

[Artem Belevich via Phabricator via cfe-commits]

tra added inline comments.


================
Comment at: clang/lib/CodeGen/CodeGenModule.cpp:575
+    // times 100.
+    if (getTarget().getTargetOpts().CodeObjectVersion != "none") {
+      unsigned CodeObjVer;
----------------
yaxunl wrote:
> tra wrote:
> > When will it ever be set to `none`? Does the new option parser enforce the default & version values specified in the tablegen?
> > If so, then it should never be `none`.
> > If the `Values` specified for the option are not enforced, then the condition will be true if user specifies any invalid value other than `none`.
> > 
> Normal HIP programs should only use `-mcode-object-version={2|3|4|5}`. clang driver enforces that.
> 
> ROCm device library need to be compiled with `-Xclang -mcode-object-version=none` so that the module flag is not emitted. Since this use case is not for common users,  `-mcode-object-version=none` can only be used with -cc1.
I'm surprised that cc1 does not check option validity. It does check them at the driver level: https://godbolt.org/z/9T6n47es9

Assuming that's intentional, and there are no checks in cc1, then we should probably remove the now-useless `Values` from the option tablegen and add a test to verify what happens with invalid values.




CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D119026/new/

https://reviews.llvm.org/D119026