diff --git a/src/etc/platform-intrinsics/generator.py b/src/etc/platform-intrinsics/generator.py
index d1217c1fb2b4a..e3aa4e688d38b 100644
--- a/src/etc/platform-intrinsics/generator.py
+++ b/src/etc/platform-intrinsics/generator.py
@@ -737,6 +737,9 @@ def open(self, platform):
 use IntrinsicDef::Named;
 use rustc::middle::ty;
 
+// The default inlining settings trigger a pathological behaviour in
+// LLVM, which causes makes compilation very slow. See #28273.
+#[inline(never)]
 pub fn find<'tcx>(_tcx: &ty::ctxt<'tcx>, name: &str) -> Option<Intrinsic> {{
     if !name.starts_with("{0}") {{ return None }}
     Some(match &name["{0}".len()..] {{'''.format(platform.intrinsic_prefix())
diff --git a/src/librustc_platform_intrinsics/aarch64.rs b/src/librustc_platform_intrinsics/aarch64.rs
index 1db5b3cb9ea30..fda65554cd2f2 100644
--- a/src/librustc_platform_intrinsics/aarch64.rs
+++ b/src/librustc_platform_intrinsics/aarch64.rs
@@ -17,6 +17,8 @@ use {Intrinsic, i, i_, u, u_, f, v, v_, agg, p, void};
 use IntrinsicDef::Named;
 use rustc::middle::ty;
 
+// The default inlining settings trigger a pathological behaviour in
+// LLVM, which causes makes compilation very slow. See #28273.
 #[inline(never)]
 pub fn find<'tcx>(_tcx: &ty::ctxt<'tcx>, name: &str) -> Option<Intrinsic> {
     if !name.starts_with("aarch64_v") { return None }
diff --git a/src/librustc_platform_intrinsics/arm.rs b/src/librustc_platform_intrinsics/arm.rs
index eae5c520883db..166bf66d819c7 100644
--- a/src/librustc_platform_intrinsics/arm.rs
+++ b/src/librustc_platform_intrinsics/arm.rs
@@ -13,10 +13,12 @@
 
 #![allow(unused_imports)]
 
-use {Intrinsic, i, i_, u, u_, f, v, agg, p};
+use {Intrinsic, i, i_, u, u_, f, v, v_, agg, p, void};
 use IntrinsicDef::Named;
 use rustc::middle::ty;
 
+// The default inlining settings trigger a pathological behaviour in
+// LLVM, which causes makes compilation very slow. See #28273.
 #[inline(never)]
 pub fn find<'tcx>(_tcx: &ty::ctxt<'tcx>, name: &str) -> Option<Intrinsic> {
     if !name.starts_with("arm_v") { return None }
diff --git a/src/librustc_platform_intrinsics/x86.rs b/src/librustc_platform_intrinsics/x86.rs
index 19aeb589e70eb..144fd5f4e761b 100644
--- a/src/librustc_platform_intrinsics/x86.rs
+++ b/src/librustc_platform_intrinsics/x86.rs
@@ -17,6 +17,8 @@ use {Intrinsic, i, i_, u, u_, f, v, v_, agg, p, void};
 use IntrinsicDef::Named;
 use rustc::middle::ty;
 
+// The default inlining settings trigger a pathological behaviour in
+// LLVM, which causes makes compilation very slow. See #28273.
 #[inline(never)]
 pub fn find<'tcx>(_tcx: &ty::ctxt<'tcx>, name: &str) -> Option<Intrinsic> {
     if !name.starts_with("x86_mm") { return None }