[llvm-branch-commits] [clang] [HLSL] Introduce address space `hlsl_constant(2)` for constant buffer declarations (PR #123411)

[Helena Kotas via llvm-branch-commits]

================
@@ -100,22 +100,6 @@ GlobalVariable *replaceBuffer(CGHLSLRuntime::Buffer &Buf) {
       llvm::formatv("{0}{1}", Buf.Name, Buf.IsCBuffer ? ".cb." : ".tb."),
       GlobalValue::NotThreadLocal);
 
-  IRBuilder<> B(CBGV->getContext());
-  Value *ZeroIdx = B.getInt32(0);
-  // Replace Const use with CB use.
-  for (auto &[GV, Offset] : Buf.Constants) {
-    Value *GEP =
-        B.CreateGEP(Buf.LayoutStruct, CBGV, {ZeroIdx, B.getInt32(Offset)});
-
-    assert(Buf.LayoutStruct->getElementType(Offset) == GV->getValueType() &&
-           "constant type mismatch");
-
-    // Replace.
-    GV->replaceAllUsesWith(GEP);
-    // Erase GV.
-    GV->removeDeadConstantUsers();
-    GV->eraseFromParent();
-  }
----------------
hekota wrote:

I am removing this part to make sure we preserve the loads in the new address 
space, but there is more reworking to be done in this area.

https://github.com/llvm/llvm-project/pull/123411
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