From c4b98c4427fb4c12663bcd7d76e4c7c5a290b98e Mon Sep 17 00:00:00 2001
From: Daniel Paoliello <danpao@microsoft.com>
Date: Wed, 3 Sep 2025 17:02:52 -0700
Subject: [PATCH 1/2] Update cc-rs to 1.2.33

---
 Cargo.lock                     | 7 +++----
 compiler/rustc_llvm/Cargo.toml | 2 +-
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 3d4a1bf6a7880..28f7429a21ef2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -462,9 +462,9 @@ version = "0.1.0"
 
 [[package]]
 name = "cc"
-version = "1.2.16"
+version = "1.2.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be714c154be609ec7f5dad223a33bf1482fff90472de28f7362806e6d4832b8c"
+checksum = "3ee0f8803222ba5a7e2777dd72ca451868909b1ac410621b676adf07280e9b5f"
 dependencies = [
  "jobserver",
  "libc",
@@ -5504,8 +5504,7 @@ version = "0.1.0"
 [[package]]
 name = "tikv-jemalloc-sys"
 version = "0.6.0+5.3.0-1-ge13ca993e8ccb9ba9847cc330696e02839f328f7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd3c60906412afa9c2b5b5a48ca6a5abe5736aec9eb48ad05037a677e52e4e2d"
+source = "git+https://github.com/dpaoliello/jemallocator.git?branch=temp#329682034ae0b8f7cca4514146b211d7dc694c9c"
 dependencies = [
  "cc",
  "libc",
diff --git a/compiler/rustc_llvm/Cargo.toml b/compiler/rustc_llvm/Cargo.toml
index ad93c74538130..45011f9b446cb 100644
--- a/compiler/rustc_llvm/Cargo.toml
+++ b/compiler/rustc_llvm/Cargo.toml
@@ -11,7 +11,7 @@ libc = "0.2.73"
 [build-dependencies]
 # tidy-alphabetical-start
 # `cc` updates often break things, so we pin it here.
-cc = "=1.2.16"
+cc = "=1.2.33"
 # tidy-alphabetical-end
 
 [features]

From ea1101f2db15b1a9a3ee95ac8daae8d4750eba3c Mon Sep 17 00:00:00 2001
From: Daniel Paoliello <danpao@microsoft.com>
Date: Tue, 23 Sep 2025 15:12:47 -0700
Subject: [PATCH 2/2] Test jemalloc fix

---
 Cargo.lock                    | 2 +-
 Cargo.toml                    | 4 ++--
 src/tools/tidy/src/extdeps.rs | 1 +
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 28f7429a21ef2..991a51cb9f19e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5504,7 +5504,7 @@ version = "0.1.0"
 [[package]]
 name = "tikv-jemalloc-sys"
 version = "0.6.0+5.3.0-1-ge13ca993e8ccb9ba9847cc330696e02839f328f7"
-source = "git+https://github.com/dpaoliello/jemallocator.git?branch=temp#329682034ae0b8f7cca4514146b211d7dc694c9c"
+source = "git+https://github.com/dpaoliello/jemallocator.git?branch=filterlto#6db31514fd2241445a4b5f350ef0f9a214d69793"
 dependencies = [
  "cc",
  "libc",
diff --git a/Cargo.toml b/Cargo.toml
index 67c7a9d67edc8..ff23c351082ac 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -91,5 +91,5 @@ codegen-units = 1
 
 # If you want to use a crate with local modifications, you can set a path or git dependency here.
 # For git dependencies, also add your source to ALLOWED_SOURCES in src/tools/tidy/src/extdeps.rs.
-#[patch.crates-io]
-
+[patch.crates-io]
+tikv-jemalloc-sys = { git = 'https://github.com/dpaoliello/jemallocator.git', branch = 'filterlto' }
diff --git a/src/tools/tidy/src/extdeps.rs b/src/tools/tidy/src/extdeps.rs
index f75de13b45ceb..99df1dd8b795c 100644
--- a/src/tools/tidy/src/extdeps.rs
+++ b/src/tools/tidy/src/extdeps.rs
@@ -11,6 +11,7 @@ const ALLOWED_SOURCES: &[&str] = &[
     r#""registry+https://github.com/rust-lang/crates.io-index""#,
     // This is `rust_team_data` used by `site` in src/tools/rustc-perf,
     r#""git+https://github.com/rust-lang/team#a5260e76d3aa894c64c56e6ddc8545b9a98043ec""#,
+    r#""git+https://github.com/dpaoliello/jemallocator.git?branch=filterlto#6db31514fd2241445a4b5f350ef0f9a214d69793""#,
 ];
 
 /// Checks for external package sources. `root` is the path to the directory that contains the