pitrou commented on a change in pull request #10846:
URL: https://github.com/apache/arrow/pull/10846#discussion_r680982433
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File path: cpp/src/arrow/util/bit_util.h
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@@ -310,8 +310,13 @@ static inline void SetBitTo(uint8_t* bits, int64_t i, bool
bit_is_set) {
// "Conditionally set or clear bits without branching"
// NOTE: this seems to confuse Valgrind as it reads from potentially
// uninitialized memory
+#ifdef SUPERSCALAR_CPU
Review comment:
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