[llvm] -fsanitize=function: fix .subsections_via_symbols (PR #87527)

[Leonard Grey via llvm-commits]

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@@ -927,6 +927,30 @@ void AsmPrinter::emitDebugValue(const MCExpr *Value, unsigned Size) const {
 
 void AsmPrinter::emitFunctionHeaderComment() {}
 
+void AsmPrinter::emitFunctionPrefix(
+    const SmallVector<const Constant *, 1> &Prefix) {
+  const Function &F = MF->getFunction();
+  if (!MAI->hasSubsectionsViaSymbols()) {
+    for (auto &C : Prefix) {
+      emitGlobalConstant(F.getParent()->getDataLayout(), C);
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speednoisemovement wrote:

Done

https://github.com/llvm/llvm-project/pull/87527