[PATCH] D104285: [analyzer] Retrieve value by direct index from list initialization of constant array declaration.

[Denys Petrov via Phabricator via cfe-commits]

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We can use direct index to retrieve a value from multi-dimensional array relying on a fact that static constant array is a solid block of memory. Iterate through a list initialization using a raw index to get the value.

Example:

  const int arr[2][2] = {{1}, {3, 4}};
  const int *ptr = (int *)arr;
  ptr[0]; // 1
  ptr[1]; // 0
  ptr[2]; // 3
  ptr[3]; // 4

Fixes: https://bugs.llvm.org/show_bug.cgi?id=50604


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D104285

Files:
  clang/include/clang/AST/Expr.h
  clang/include/clang/AST/Type.h
  clang/lib/AST/Expr.cpp
  clang/lib/AST/Type.cpp
  clang/lib/StaticAnalyzer/Core/RegionStore.cpp
  clang/test/Analysis/initialization.cpp

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