[clang] [ASAN] For Asan instrumented global, emit two symbols, one with actual size and other with instrumented size. (PR #70166)

[via cfe-commits]

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@@ -2441,6 +2441,9 @@ void ModuleAddressSanitizer::instrumentGlobals(IRBuilder<> &IRB, Module &M,
     // zero so we can copy the metadata over as is.
     NewGlobal->copyMetadata(G, 0);
 
+    // Attach "asan_instrumented" attribute to the new global.
+    NewGlobal->addAttribute(Attribute::SanitizeAddress);
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skc7 wrote:

This would be replaced by "asan_instrumented" attributes, once #68865 gets approved and merged.

https://github.com/llvm/llvm-project/pull/70166