[clang] [mlir] [Clang]Check for a valid Index in array before getting it (PR #172399)

[Balaji V. Iyer. via cfe-commits]

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@@ -0,0 +1,13 @@
+// RUN: %clang_cc1  --std=c++17  -fexperimental-new-constant-interpreter -verify=experiment %s
+// RUN: %clang_cc1  --std=c++17  -triple x86_64-pc-win32 -verify=experiment %s
+// RUN: %clang_cc1  --std=c++17  -triple x86_64-pc-linux -verify=none %s
+
+#ifndef _MSC_VER
+// none-no-diagnostics
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bviyer wrote:

Without this change, it is failing the windows CI: https://github.com/llvm/llvm-project/actions/runs/20447845257/job/58754784851


https://github.com/llvm/llvm-project/pull/172399