Revert "[CUDA][HIP] Fix overloading resolution in global variable initializer"

This reverts commit de0df639724b10001ea9a74539381ea494296be9.

It was reverted due to regression in HIP unit test on Windows:

 In file included from C:\hip-tests\catch\unit\graph\hipGraphClone.cc:37:

 In file included from C:\hip-tests\catch\.\include\hip_test_common.hh:24:

 In file included from C:\hip-tests\catch\.\include/hip_test_context.hh:24:

 In file included from C:/install/native/Release/x64/hip/include\hip/hip_runtime.h:54:

 C:/dk/win\vc\14.31.31107\include\thread:76:70: error: cannot initialize a parameter of type '_beginthreadex_proc_type' (aka 'unsigned int (*)(void *) __attribute__((stdcall))') with an lvalue of type 'const unsigned int (*)(void *) noexcept __attribute__((stdcall))': different exception specifications

    76 |             reinterpret_cast<void*>(_CSTD _beginthreadex(nullptr, 0, _Invoker_proc, _Decay_copied.get(), 0, &_Thr._Id));

       |                                                                      ^~~~~~~~~~~~~

 C:\hip-tests\catch\unit\graph\hipGraphClone.cc:290:21) &>' requested here

    90 |         _Start(_STD forward<_Fn>(_Fx), _STD forward<_Args>(_Ax)...);

       |         ^

 C:\hip-tests\catch\unit\graph\hipGraphClone.cc:290:21) &, 0>' requested here

   311 |     std::thread t(lambdaFunc);

       |                 ^

 C:/dk/win\ms_wdk\e22621\Include\10.0.22621.0\ucrt\process.h:99:40: note: passing argument to parameter '_StartAddress' here

    99 |     _In_      _beginthreadex_proc_type _StartAddress,

       |                                        ^

 1 error generated when compiling for gfx1030.

1 files changed, 3 insertions, 21 deletions

diff --git a/clang/lib/Sema/SemaCUDA.cpp b/clang/lib/Sema/SemaCUDA.cpp
index 88f5484..cfea649 100644
--- a/clang/lib/Sema/SemaCUDA.cpp
+++ b/clang/lib/Sema/SemaCUDA.cpp
@@ -105,37 +105,19 @@ Sema::IdentifyCUDATarget(const ParsedAttributesView &Attrs) {
 }
 
 template <typename A>
-static bool hasAttr(const Decl *D, bool IgnoreImplicitAttr) {
+static bool hasAttr(const FunctionDecl *D, bool IgnoreImplicitAttr) {
   return D->hasAttrs() && llvm::any_of(D->getAttrs(), [&](Attr *Attribute) {
            return isa<A>(Attribute) &&
                   !(IgnoreImplicitAttr && Attribute->isImplicit());
          });
 }
 
-Sema::CUDATargetContextRAII::CUDATargetContextRAII(Sema &S_,
-                                                   CUDATargetContextKind K,
-                                                   Decl *D)
-    : S(S_) {
-  SavedCtx = S.CurCUDATargetCtx;
-  assert(K == CTCK_InitGlobalVar);
-  auto *VD = dyn_cast_or_null<VarDecl>(D);
-  if (VD && VD->hasGlobalStorage() && !VD->isStaticLocal()) {
-    auto Target = CFT_Host;
-    if ((hasAttr<CUDADeviceAttr>(VD, /*IgnoreImplicit=*/true) &&
-         !hasAttr<CUDAHostAttr>(VD, /*IgnoreImplicit=*/true)) ||
-        hasAttr<CUDASharedAttr>(VD, /*IgnoreImplicit=*/true) ||
-        hasAttr<CUDAConstantAttr>(VD, /*IgnoreImplicit=*/true))
-      Target = CFT_Device;
-    S.CurCUDATargetCtx = {Target, K, VD};
-  }
-}
-
 /// IdentifyCUDATarget - Determine the CUDA compilation target for this function
 Sema::CUDAFunctionTarget Sema::IdentifyCUDATarget(const FunctionDecl *D,
                                                   bool IgnoreImplicitHDAttr) {
-  // Code that lives outside a function gets the target from CurCUDATargetCtx.
+  // Code that lives outside a function is run on the host.
   if (D == nullptr)
-    return CurCUDATargetCtx.Target;
+    return CFT_Host;
 
   if (D->hasAttr<CUDAInvalidTargetAttr>())
     return CFT_InvalidTarget;