[clang] [llvm] [MTE] Apply alignment / size in AsmPrinter rather than IR (PR #111918)

[Florian Mayer via cfe-commits]

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@@ -764,11 +764,17 @@ void AsmPrinter::emitGlobalVariable(const GlobalVariable *GV) {
 
   const DataLayout &DL = GV->getDataLayout();
   uint64_t Size = DL.getTypeAllocSize(GV->getValueType());
+  if (GV->isTagged())
+    Size = alignTo(Size, 16);
 
   // If the alignment is specified, we *must* obey it.  Overaligning a global
   // with a specified alignment is a prompt way to break globals emitted to
   // sections and expected to be contiguous (e.g. ObjC metadata).
-  const Align Alignment = getGVAlignment(GV, DL);
+  Align Alignment = getGVAlignment(GV, DL);
+  if (GV->isTagged() && Alignment < 16) {
+    assert(!GV->hasSection());
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fmayer wrote:

It is in `shouldTagGlobal`

https://github.com/llvm/llvm-project/pull/111918