[compiler-rt] Poison last word of FakeFrame (PR #133689)

[Vitaly Buka via llvm-commits]

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@@ -49,13 +49,6 @@ uint32_t unsigned_shift_base() {
   return x;
 }
 
-uint32_t array_bounds() {
-  _BitInt(37) x[4];
-  _BitInt(37) y = x[10];
-  // CHECK: {{.*}}bit-int.c:[[#@LINE-1]]:19: runtime error: index 10 out of bounds for type
-  return (uint32_t)y;
-}
-
 uint32_t float_cast_overflow() {
   float a = 100000000.0f;
   _BitInt(7) b = (_BitInt(7))a;
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vitalybuka wrote:

It will not prevent fake frame, but x[] will be followed by non-poisoned bytes of "something"

https://github.com/llvm/llvm-project/pull/133689