[clang-tools-extra] [compiler-rt] [lldb] [llvm] [Memprof] Adds the option to collect AccessCountHistograms for memprof. (PR #94264)

[Matthew Weingarten via cfe-commits]

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@@ -508,7 +519,26 @@ void createProfileFileNameVar(Module &M) {
   }
 }
 
+// Set MemprofHistogramFlag as a Global veriable in IR. This makes it accessible
+// to
+// the runtime, changing shadow count behavior.
+void createMemprofHistogramFlagVar(Module &M) {
+  const StringRef VarName(MemProfHistogramFlagVar);
+  Type *IntTy1 = Type::getInt1Ty(M.getContext());
+  auto MemprofHistogramFlag = new GlobalVariable(
+      M, IntTy1, true, GlobalValue::WeakAnyLinkage,
+      Constant::getIntegerValue(IntTy1, APInt(1, ClHistogram)), VarName);
+  // MemprofHistogramFlag->setVisibility(GlobalValue::HiddenVisibility);
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mattweingarten wrote:

done.

https://github.com/llvm/llvm-project/pull/94264