[clang] [llvm] [OpenMP]Initial parsing/sema support for target_device selector set (PR #118471)

[Shilei Tian via cfe-commits]

================
@@ -2903,7 +2903,10 @@ TargetOMPContext::TargetOMPContext(
     const FunctionDecl *CurrentFunctionDecl,
     ArrayRef<llvm::omp::TraitProperty> ConstructTraits)
     : OMPContext(ASTCtx.getLangOpts().OpenMPIsTargetDevice,
-                 ASTCtx.getTargetInfo().getTriple()),
+                 ASTCtx.getTargetInfo().getTriple(),
+                 ASTCtx.getLangOpts().OMPTargetTriples.empty()
+                     ? llvm::Triple()
+                     : ASTCtx.getLangOpts().OMPTargetTriples[0]),
----------------
shiltian wrote:

There is `--offload-arch` available to support multiple targets. Does it apply 
to host?

https://github.com/llvm/llvm-project/pull/118471
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