[clang-tools-extra] [compiler-rt] [flang] [libcxx] [libc] [llvm] [clang] [Clang] Generate the GEP instead of adding AST nodes (PR #73730)

[Bill Wendling via cfe-commits]

================
@@ -4022,8 +4169,36 @@ LValue CodeGenFunction::EmitArraySubscriptExpr(const 
ArraySubscriptExpr *E,
       ArrayLV = EmitArraySubscriptExpr(ASE, /*Accessed*/ true);
     else
       ArrayLV = EmitLValue(Array);
+
     auto *Idx = EmitIdxAfterBase(/*Promote*/true);
 
+    if (SanOpts.has(SanitizerKind::ArrayBounds)) {
----------------
bwendling wrote:

What do you mean the other uses of `__counted_by`? It's only used with FAMs and 
in the sanitizer. This patch doesn't add new functionality. It only some bugs 
and modifies how the code is created.

https://github.com/llvm/llvm-project/pull/73730
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