From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Henri Sivonen <hsivonen@hsivonen.fi>
Date: Mon, 20 Apr 2026 16:03:25 +0200
Subject: [PATCH] Bug 2033279 - Make --enable-rust-simd work with Rust 1.95.

Differential Revision: https://phabricator.services.mozilla.com/D295287
---
 .cargo/config.toml.in                         |  5 ++
 Cargo.lock                                    |  4 +-
 Cargo.toml                                    |  2 +
 supply-chain/audits.toml                      |  6 ++
 supply-chain/config.toml                      |  4 ++
 .../rust/encoding_rs/.cargo-checksum.json     |  2 +-
 third_party/rust/encoding_rs/Cargo.toml       | 60 ++++++++++---------
 .../rust/encoding_rs/src/x_user_defined.rs    |  2 +
 8 files changed, 54 insertions(+), 31 deletions(-)

diff --git a/.cargo/config.toml.in b/.cargo/config.toml.in
index c3a03570df07..b5d1bc74ac5e 100644
--- a/.cargo/config.toml.in
+++ b/.cargo/config.toml.in
@@ -70,6 +70,11 @@ git = "https://github.com/hsivonen/chardetng_c"
 rev = "ed8a4c6f900a90d4dbc1d64b856e61490a1c3570"
 replace-with = "vendored-sources"
 
+[source."git+https://github.com/hsivonen/encoding_rs?rev=1236d1bc423e6ba35a06485f74a6304db2d703b5"]
+git = "https://github.com/hsivonen/encoding_rs"
+rev = "1236d1bc423e6ba35a06485f74a6304db2d703b5"
+replace-with = "vendored-sources"
+
 [source."git+https://github.com/jfkthame/mapped_hyph.git?rev=eff105f6ad7ec9b79816cfc1985a28e5340ad14b"]
 git = "https://github.com/jfkthame/mapped_hyph.git"
 rev = "eff105f6ad7ec9b79816cfc1985a28e5340ad14b"
diff --git a/Cargo.lock b/Cargo.lock
index 4f325a32203e..4e56696db7bb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1818,11 +1818,11 @@ dependencies = [
 [[package]]
 name = "encoding_rs"
 version = "0.8.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75030f3c4f45dafd7586dd6780965a8c7e8e285a5ecb86713e63a79c5b2766f3"
+source = "git+https://github.com/hsivonen/encoding_rs?rev=1236d1bc423e6ba35a06485f74a6304db2d703b5#1236d1bc423e6ba35a06485f74a6304db2d703b5"
 dependencies = [
  "any_all_workaround",
  "cfg-if",
+ "rustversion",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 57cfc09d3b09..c6131be24ccd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -260,6 +260,8 @@ midir = { git = "https://github.com/mozilla/midir.git", rev = "85156e360a37d8517
 malloc_size_of_derive = { path = "xpcom/rust/malloc_size_of_derive" }
 # Use the in-tree code instead of pulling it in. It matches the crates.io version
 wr_malloc_size_of = { path = "gfx/wr/wr_malloc_size_of" }
+# Make --enable-rust-simd compatible with Rust 1.95
+encoding_rs = { git = "https://github.com/hsivonen/encoding_rs", rev = "1236d1bc423e6ba35a06485f74a6304db2d703b5" }
 
 # objc 0.2.7 + fa7ca43b862861dd1cd000d7ad01e6e0266cda13
 objc = { git = "https://github.com/glandium/rust-objc", rev = "4de89f5aa9851ceca4d40e7ac1e2759410c04324" }
diff --git a/supply-chain/audits.toml b/supply-chain/audits.toml
index b1a46ab1d7a7..89b3b2b3ac79 100644
--- a/supply-chain/audits.toml
+++ b/supply-chain/audits.toml
@@ -2099,6 +2099,12 @@ who = "Mike Hommey <mh+mozilla@glandium.org>"
 criteria = "safe-to-deploy"
 delta = "0.8.31 -> 0.8.32"
 
+[[audits.encoding_rs]]
+who = "Henri Sivonen <hsivonen@hsivonen.fi>"
+criteria = "safe-to-deploy"
+delta = "0.8.35 -> 0.8.35@git:1236d1bc423e6ba35a06485f74a6304db2d703b5"
+importable = false
+
 [[audits.enum-map]]
 who = "Kershaw Chang <kershaw@mozilla.com>"
 criteria = "safe-to-deploy"
diff --git a/supply-chain/config.toml b/supply-chain/config.toml
index 9b9308f9825b..e2c551b6bdf9 100644
--- a/supply-chain/config.toml
+++ b/supply-chain/config.toml
@@ -59,6 +59,10 @@ notes = "This is a pinned version of the upstream code. This can be removed when
 audit-as-crates-io = true
 notes = "This is a pinned version of the upstream code. This can be removed when new version gets published."
 
+[policy.encoding_rs]
+audit-as-crates-io = true
+notes = "This is upstream plus a build fix for bug 2033279."
+
 [policy.firefox-on-glean]
 audit-as-crates-io = false
 notes = "The crates.io version of this is just a placeholder to allow public crates to depend on firefox-on-glean."
diff --git a/third_party/rust/encoding_rs/.cargo-checksum.json b/third_party/rust/encoding_rs/.cargo-checksum.json
index 672cac3e3654..1e0ddc9e211b 100644
--- a/third_party/rust/encoding_rs/.cargo-checksum.json
+++ b/third_party/rust/encoding_rs/.cargo-checksum.json
@@ -1 +1 @@
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\ No newline at end of file
+{"files":{"CONTRIBUTING.md":"ca1901f3e8532fb4cec894fd3664f0eaa898c0c4b961d1b992d1ed54eacf362a","COPYRIGHT":"11789f45bb180841cd362a5eee6789c68ddb573a11105e30768c308a6add0190","Cargo.toml":"a066ad881d5a74386e666fc844f7fecbbd70021d0330c1b08a2d7a2a67437ccf","Ideas.md":"b7452893f500163868d8de52c09addaf91e1632454ed02e892c467ed7ec39dbd","LICENSE-APACHE":"cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30","LICENSE-MIT":"3fa4ca83dcc9237839b1bdeb2e6d16bdfb5ec0c5ce42b24694d8bbf0dcbef72c","LICENSE-WHATWG":"838118388fe5c2e7f1dbbaeed13e1c7f3ebf88be91319c7c1d77c18e987d1a50","README.md":"9826137ed4297be3b2019b74a8f6111a796ff507bde41df2f20712539704b9e9","ci/miri.sh":"43cb8d82f49e3bfe2d2274b6ccd6f0714a4188ccef0cecc040829883cfdbee25","doc/Big5.txt":"f73a2edc5cb6c2d140ba6e07f4542e1c4a234950378acde1df93480f0ca0be0b","doc/EUC-JP.txt":"ee2818b907d0137f40a9ab9fd525fc700a44dbdddb6cf0c157a656566bae4bf1","doc/EUC-KR.txt":"71d9e2ccf3b124e8bdfb433c8cf2773fd878077038d0cec3c7237a50f4a78a30","doc/GBK.txt":"8229e59076d8bddb01865cdcf6afda3533238d7c23d97f98820f9e3b2d13505d","doc/IBM866.txt":"a5a433e804d0f83af785015179fbc1d9b0eaf1f7960efcd04093e136b51fbd0e","doc/ISO-2022-JP.txt":"af86684f5a8f0e2868d7b2c292860140c3d2e5527530ca091f1b28198e8e2fe6","doc/ISO-8859-10.txt":"6d3949ad7c81ca176895101ed81a1db7df1060d64e262880b94bd31bb344ab4d","doc/ISO-8859-13.txt":"3951dd89cf93f7729148091683cf8511f4529388b7dc8dcd0d62eaed55be93fa","doc/ISO-8859-14.txt":"3d330784a0374fd255a38b47949675cc7168c800530534b0a01cac6edc623adc","doc/ISO-8859-15.txt":"24b1084aab5127a85aab99153f86e24694d0a3615f53b5ce23683f97cf66c47a","doc/ISO-8859-16.txt":"ce0272559b92ba76d7a7e476f6424ae4a5cc72e75b183611b08392e44add4d25","doc/ISO-8859-2.txt":"18ceff88c13d1b5ba455a3919b1e3de489045c4c3d2dd7e8527c125c75d54aad","doc/ISO-8859-3.txt":"21798404c68f4f5db59223362f24999da96968c0628427321fccce7d2849a130","doc/ISO-8859-4.txt":"d27f6520c6c5bfbcc19176b71d081cdb3bccde1622bb3e420d5680e812632d53","doc/ISO-8859-5.txt":"a10ec8d6ea7a78ad15da7275f6cb1a3365118527e28f9af6d0d5830501303f3a","doc/ISO-8859-6.txt":"ccda8a2efc96115336bdd77776637b9712425e44fbcf745353b9057fbef144e7","doc/ISO-8859-7.txt":"17900fa1f27a445958f0a77d7d9056be375a6bd7ee4492aa680c7c1500bab85e","doc/ISO-8859-8-I.txt":"8357555646d54265a9b9ffa3e68b08d132312f1561c60108ff9b8b1167b6ecf2","doc/ISO-8859-8.txt":"72cd6f3afb7b4a9c16a66a362473315770b7755d72c86c870e52fc3eba86c8af","doc/KOI8-R.txt":"839cf19a38da994488004ed7814b1f6151640156a9a2af02bf2efca745fb5966","doc/KOI8-U.txt":"0cc76624ed1f024183e2298b7e019957da2c70c8ca06e0fc4e6f353f50a5054f","doc/Shift_JIS.txt":"34c49141818cb9ddbcf59cc858f78a79be8ad148d563f26415108ae1f148443f","doc/UTF-16BE.txt":"e2e280d8acbaa6d2a6b3569d60e17500a285f2baa0df3363dd85537cd5a1ef8f","doc/UTF-16LE.txt":"70bdc170e3fc5298ba68f10125fb5eeb8b077036cc96bb4416c4de396f6d76c1","doc/UTF-8.txt":"ea7bae742e613010ced002cf4b601a737d2203fad65e115611451bc4428f548a","doc/gb18030.txt":"67a01665c75505330b0fe5b8d88d5873d8ce555a145c77dca04a467fa2680744","doc/macintosh.txt":"57491e53866711b4672d9b9ff35380b9dac9e0d8e3d6c20bdd6140603687c023","doc/replacement.txt":"4b6c3bbd7999d9d4108a281594bd02d13607e334a95465afff8c2c08d395f0e4","doc/windows-1250.txt":"61296bb6a21cdab602300d32ecfba434cb82de5ac3bc88d58710d2f125e28d39","doc/windows-1251.txt":"7deea1c61dea1485c8ff02db2c7d578db7a9aab63ab1cfd02ec04b515864689e","doc/windows-1252.txt":"933ef3bdddfce5ee132b9f1a1aa8b47423d2587bbe475b19028d0a6d38e180b6","doc/windows-1253.txt":"1a38748b88e99071a5c7b3d5456ead4caedeabab50d50d658be105bc113714de","doc/windows-1254.txt":"f8372f86c6f8d642563cd6ddc025260553292a39423df1683a98670bd7bf2b47","doc/windows-1255.txt":"4e5852494730054e2da258a74e1b9d780abbcdd8ce22ebc218ca2efe9e90493d","doc/windows-1256.txt":"c0879c5172abedead302a406e8f60d9cd9598694a0ffa4fd288ffe4fef7b8ea1","doc/windows-1257.txt":"c28a0c9f964fcb2b46d21f537c402446501a2800670481d6abf9fd9e9018d523","doc/windows-1258.txt":"5019ae4d61805c79aacbf17c93793342dbb098d65a1837783bc3e2c6d6a23602","doc/windows-874.txt":"4ef0e4501c5feba8b17aee1818602ed44b36ca8475db771ce2fc16d392cabecc","doc/x-mac-cyrillic.txt":"58be154d8a888ca3d484b83b44f749823ef339ab27f14d90ca9a856f5050a8bd","doc/x-user-defined.txt":"f9cd07c4321bf5cfb0be4bdddd251072999b04a6cf7a6f5bc63709a84e2c1ffc","generate-encoding-data.py":"6f34a845785f53425accf30759edc566873fcb0c2188648e07b09c898f39dddb","rustfmt.toml":"85c1a3b4382fd89e991cbb81b70fb52780472edc064c963943cdaaa56e0a2030","src/ascii.rs":"588e38b01e666d5e7462617ea7e90a108d608dec9e016f3d273ac0744af2e05d","src/big5.rs":"ec6e2913011a38e9a3e825a1731f139a7ca1d5b264fefae51a3cc1a68a57cef9","src/data.rs":"b93f34025fe5c6a85b4b9f0037bf58961352bf19c83f91b09b35eb8495625eec","src/euc_jp.rs":"32047f5b540188c4cb19c07165f846b9786a09f18e315ed3e9bda1293dae52aa","src/euc_kr.rs":"9b25afc72d9378700eecfac58d55ad1c5946d6cd0ccde2c29c08200ef2de6bb9","src/gb18030.rs":"89cd6ae2247add3f3471a699bc12113a9ae2f6b91a5223abbf15b68a13537dcd","src/gb18030_2022.rs":"3c2e06492c5e00fcd39515e4af4c560d8cee5c31e7a7e388db682bc9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\ No newline at end of file
diff --git a/third_party/rust/encoding_rs/Cargo.toml b/third_party/rust/encoding_rs/Cargo.toml
index 2adac351c2ed..0239315bab18 100644
--- a/third_party/rust/encoding_rs/Cargo.toml
+++ b/third_party/rust/encoding_rs/Cargo.toml
@@ -16,72 +16,76 @@ name = "encoding_rs"
 version = "0.8.35"
 authors = ["Henri Sivonen <hsivonen@hsivonen.fi>"]
 build = false
+autolib = false
 autobins = false
 autoexamples = false
 autotests = false
 autobenches = false
 description = "A Gecko-oriented implementation of the Encoding Standard"
 homepage = "https://docs.rs/encoding_rs/"
 documentation = "https://docs.rs/encoding_rs/"
 readme = "README.md"
 keywords = [
     "encoding",
     "web",
     "unicode",
     "charset",
 ]
 categories = [
     "text-processing",
     "encoding",
     "web-programming",
     "internationalization",
 ]
 license = "(Apache-2.0 OR MIT) AND BSD-3-Clause"
 repository = "https://github.com/hsivonen/encoding_rs"
 
-[profile.release]
-lto = true
-
-[lib]
-name = "encoding_rs"
-path = "src/lib.rs"
-
-[dependencies.any_all_workaround]
-version = "0.1.0"
-optional = true
-
-[dependencies.cfg-if]
-version = "1.0"
-
-[dependencies.serde]
-version = "1.0"
-optional = true
-
-[dev-dependencies.bincode]
-version = "1.0"
-
-[dev-dependencies.serde_derive]
-version = "1.0"
-
-[dev-dependencies.serde_json]
-version = "1.0"
-
 [features]
 alloc = []
 default = ["alloc"]
 fast-big5-hanzi-encode = []
 fast-gb-hanzi-encode = []
 fast-hangul-encode = []
 fast-hanja-encode = []
 fast-kanji-encode = []
 fast-legacy-encode = [
     "fast-hangul-encode",
     "fast-hanja-encode",
     "fast-kanji-encode",
     "fast-gb-hanzi-encode",
     "fast-big5-hanzi-encode",
 ]
 less-slow-big5-hanzi-encode = []
 less-slow-gb-hanzi-encode = []
 less-slow-kanji-encode = []
-simd-accel = ["any_all_workaround"]
+simd-accel = [
+    "any_all_workaround",
+    "rustversion",
+]
+
+[lib]
+name = "encoding_rs"
+path = "src/lib.rs"
+
+[dependencies]
+cfg-if = "1.0"
+
+[dependencies.any_all_workaround]
+version = "0.1.0"
+optional = true
+
+[dependencies.rustversion]
+version = "1.0.19"
+optional = true
+
+[dependencies.serde]
+version = "1.0"
+optional = true
+
+[dev-dependencies]
+bincode = "1.0"
+serde_derive = "1.0"
+serde_json = "1.0"
+
+[profile.release]
+lto = true
diff --git a/third_party/rust/encoding_rs/src/x_user_defined.rs b/third_party/rust/encoding_rs/src/x_user_defined.rs
index 7af7d5e3d69d..16f1a18d7f6c 100644
--- a/third_party/rust/encoding_rs/src/x_user_defined.rs
+++ b/third_party/rust/encoding_rs/src/x_user_defined.rs
@@ -16,6 +16,8 @@ cfg_if! {
         use simd_funcs::*;
         use core::simd::u16x8;
         use core::simd::cmp::SimdPartialOrd;
+        #[rustversion::since(1.95)]
+        use core::simd::Select;
 
         #[inline(always)]
         fn shift_upper(unpacked: u16x8) -> u16x8 {