From 192f02c0cd0adf2474d406a6c53a767c8217a662 Mon Sep 17 00:00:00 2001
From: Milad Fa <mfarazma@ibm.com>
Date: Mon, 20 Jul 2026 16:53:28 +0000
Subject: [PATCH 1/2] Fix

---
 absl/hash/internal/hash.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/absl/hash/internal/hash.h b/absl/hash/internal/hash.h
index f68872fc488..da4362639f9 100644
--- a/absl/hash/internal/hash.h
+++ b/absl/hash/internal/hash.h
@@ -809,6 +809,7 @@ AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
     for (size_t j = 0; j < 64; ++j) {
       word |= static_cast<uint64_t>(vector[i + j]) << j;
     }
+    word = absl::little_endian::FromHost64(word);
     hash_state = combiner.add_buffer(
         std::move(hash_state), reinterpret_cast<const unsigned char*>(&word),
         sizeof(word));
@@ -821,6 +822,7 @@ AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
     for (size_t j = 0; j < rem; ++j) {
       word |= static_cast<uint64_t>(vector[i + j]) << j;
     }
+    word = absl::little_endian::FromHost64(word);
     hash_state = combiner.add_buffer(
         std::move(hash_state), reinterpret_cast<const unsigned char*>(&word),
         (rem + 7) / 8);
@@ -988,6 +990,7 @@ H AbslHashValue(H hash_state, const std::bitset<N>& set) {
     for (size_t j = 0; j < 64; ++j) {
       word |= static_cast<uint64_t>(set[i + j]) << j;
     }
+    word = absl::little_endian::FromHost64(word);
     hash_state = combiner.add_buffer(
         std::move(hash_state), reinterpret_cast<const unsigned char*>(&word),
         sizeof(word));
@@ -1000,6 +1003,7 @@ H AbslHashValue(H hash_state, const std::bitset<N>& set) {
     for (size_t j = 0; j < rem; ++j) {
       word |= static_cast<uint64_t>(set[i + j]) << j;
     }
+    word = absl::little_endian::FromHost64(word);
     hash_state = combiner.add_buffer(
         std::move(hash_state), reinterpret_cast<const unsigned char*>(&word),
         (rem + 7) / 8);

From 955225b59105b384641beee9e00c25c07b80ce7e Mon Sep 17 00:00:00 2001
From: Milad Fa <mfarazma@ibm.com>
Date: Mon, 20 Jul 2026 19:33:36 +0000
Subject: [PATCH 2/2] update

---
 absl/hash/internal/hash.h | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/absl/hash/internal/hash.h b/absl/hash/internal/hash.h
index da4362639f9..fa4b53f0f8f 100644
--- a/absl/hash/internal/hash.h
+++ b/absl/hash/internal/hash.h
@@ -809,7 +809,9 @@ AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
     for (size_t j = 0; j < 64; ++j) {
       word |= static_cast<uint64_t>(vector[i + j]) << j;
     }
-    word = absl::little_endian::FromHost64(word);
+    if constexpr (absl::endian::native == absl::endian::big) {
+      word = absl::byteswap(word);
+    }
     hash_state = combiner.add_buffer(
         std::move(hash_state), reinterpret_cast<const unsigned char*>(&word),
         sizeof(word));
@@ -822,7 +824,9 @@ AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
     for (size_t j = 0; j < rem; ++j) {
       word |= static_cast<uint64_t>(vector[i + j]) << j;
     }
-    word = absl::little_endian::FromHost64(word);
+    if constexpr (absl::endian::native == absl::endian::big) {
+      word = absl::byteswap(word);
+    }
     hash_state = combiner.add_buffer(
         std::move(hash_state), reinterpret_cast<const unsigned char*>(&word),
         (rem + 7) / 8);
@@ -990,7 +994,9 @@ H AbslHashValue(H hash_state, const std::bitset<N>& set) {
     for (size_t j = 0; j < 64; ++j) {
       word |= static_cast<uint64_t>(set[i + j]) << j;
     }
-    word = absl::little_endian::FromHost64(word);
+    if constexpr (absl::endian::native == absl::endian::big) {
+      word = absl::byteswap(word);
+    }
     hash_state = combiner.add_buffer(
         std::move(hash_state), reinterpret_cast<const unsigned char*>(&word),
         sizeof(word));
@@ -1003,7 +1009,9 @@ H AbslHashValue(H hash_state, const std::bitset<N>& set) {
     for (size_t j = 0; j < rem; ++j) {
       word |= static_cast<uint64_t>(set[i + j]) << j;
     }
-    word = absl::little_endian::FromHost64(word);
+    if constexpr (absl::endian::native == absl::endian::big) {
+      word = absl::byteswap(word);
+    }
     hash_state = combiner.add_buffer(
         std::move(hash_state), reinterpret_cast<const unsigned char*>(&word),
         (rem + 7) / 8);