[clang] [HIP] Parallelize device cc1 jobs for offload arches (PR #208254)

[Matt Arsenault via cfe-commits]

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@@ -5132,6 +5132,22 @@ static void ProcessVSRuntimeLibrary(const ToolChain &TC, const ArgList &Args,
     CmdArgs.push_back("--dependent-lib=softintrin");
 }
 
+static bool CanRunOffloadDeviceCC1JobInParallel(const JobAction &JA) {
+  if (JA.getOffloadingArch().empty())
+    return false;
+
+  if (!JA.isDeviceOffloading(Action::OFK_HIP))
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arsenm wrote:

Should not depend on the language. IMO we should remove all of the language discriminators and just have host vs. device 

https://github.com/llvm/llvm-project/pull/208254