diff --git a/src/librustc_codegen_llvm/back/write.rs b/src/librustc_codegen_llvm/back/write.rs
index 54271d3dd0491..1a5794d113366 100644
--- a/src/librustc_codegen_llvm/back/write.rs
+++ b/src/librustc_codegen_llvm/back/write.rs
@@ -975,7 +975,6 @@ pub unsafe fn with_llvm_pmb(
         (llvm::CodeGenOptLevel::Default, ..) => {
             llvm::LLVMPassManagerBuilderUseInlinerWithThreshold(builder, 225);
         }
-        (llvm::CodeGenOptLevel::Other, ..) => bug!("CodeGenOptLevel::Other selected"),
     }
 
     f(builder);
diff --git a/src/librustc_codegen_llvm/llvm/ffi.rs b/src/librustc_codegen_llvm/llvm/ffi.rs
index eb7dc827f9391..f094ad868947f 100644
--- a/src/librustc_codegen_llvm/llvm/ffi.rs
+++ b/src/librustc_codegen_llvm/llvm/ffi.rs
@@ -337,9 +337,6 @@ impl AtomicOrdering {
 #[derive(Copy, Clone)]
 #[repr(C)]
 pub enum SynchronizationScope {
-    // FIXME: figure out if this variant is needed at all.
-    #[allow(dead_code)]
-    Other,
     SingleThread,
     CrossThread,
 }
@@ -347,7 +344,6 @@ pub enum SynchronizationScope {
 impl SynchronizationScope {
     pub fn from_generic(sc: rustc_codegen_ssa::common::SynchronizationScope) -> Self {
         match sc {
-            rustc_codegen_ssa::common::SynchronizationScope::Other => SynchronizationScope::Other,
             rustc_codegen_ssa::common::SynchronizationScope::SingleThread => {
                 SynchronizationScope::SingleThread
             }
@@ -362,9 +358,6 @@ impl SynchronizationScope {
 #[derive(Copy, Clone)]
 #[repr(C)]
 pub enum FileType {
-    // FIXME: figure out if this variant is needed at all.
-    #[allow(dead_code)]
-    Other,
     AssemblyFile,
     ObjectFile,
 }
@@ -391,9 +384,6 @@ pub enum MetadataType {
 #[derive(Copy, Clone)]
 #[repr(C)]
 pub enum AsmDialect {
-    // FIXME: figure out if this variant is needed at all.
-    #[allow(dead_code)]
-    Other,
     Att,
     Intel,
 }
@@ -411,9 +401,6 @@ impl AsmDialect {
 #[derive(Copy, Clone, PartialEq)]
 #[repr(C)]
 pub enum CodeGenOptLevel {
-    // FIXME: figure out if this variant is needed at all.
-    #[allow(dead_code)]
-    Other,
     None,
     Less,
     Default,
@@ -513,9 +500,6 @@ pub enum DiagnosticLevel {
 #[derive(Copy, Clone)]
 #[repr(C)]
 pub enum ArchiveKind {
-    // FIXME: figure out if this variant is needed at all.
-    #[allow(dead_code)]
-    Other,
     K_GNU,
     K_BSD,
     K_DARWIN,
diff --git a/src/librustc_codegen_ssa/common.rs b/src/librustc_codegen_ssa/common.rs
index 432b2f3bdc3c1..e04ed531bbff2 100644
--- a/src/librustc_codegen_ssa/common.rs
+++ b/src/librustc_codegen_ssa/common.rs
@@ -72,9 +72,6 @@ pub enum AtomicOrdering {
 }
 
 pub enum SynchronizationScope {
-    // FIXME: figure out if this variant is needed at all.
-    #[allow(dead_code)]
-    Other,
     SingleThread,
     CrossThread,
 }
diff --git a/src/rustllvm/ArchiveWrapper.cpp b/src/rustllvm/ArchiveWrapper.cpp
index 93704638f8351..9ce614fda5752 100644
--- a/src/rustllvm/ArchiveWrapper.cpp
+++ b/src/rustllvm/ArchiveWrapper.cpp
@@ -35,7 +35,6 @@ struct RustArchiveIterator {
 };
 
 enum class LLVMRustArchiveKind {
-  Other,
   GNU,
   BSD,
   DARWIN,
diff --git a/src/rustllvm/PassWrapper.cpp b/src/rustllvm/PassWrapper.cpp
index 41b14714842fd..76fe5e7f769f7 100644
--- a/src/rustllvm/PassWrapper.cpp
+++ b/src/rustllvm/PassWrapper.cpp
@@ -311,7 +311,6 @@ static Optional<CodeModel::Model> fromRust(LLVMRustCodeModel Model) {
 }
 
 enum class LLVMRustCodeGenOptLevel {
-  Other,
   None,
   Less,
   Default,
@@ -597,7 +596,6 @@ extern "C" void LLVMRustSetLLVMOptions(int Argc, char **Argv) {
 }
 
 enum class LLVMRustFileType {
-  Other,
   AssemblyFile,
   ObjectFile,
 };
diff --git a/src/rustllvm/RustWrapper.cpp b/src/rustllvm/RustWrapper.cpp
index 667bf4a2ded37..9d90b0dfe0702 100644
--- a/src/rustllvm/RustWrapper.cpp
+++ b/src/rustllvm/RustWrapper.cpp
@@ -366,7 +366,6 @@ LLVMRustBuildAtomicCmpXchg(LLVMBuilderRef B, LLVMValueRef Target,
 }
 
 enum class LLVMRustSynchronizationScope {
-  Other,
   SingleThread,
   CrossThread,
 };
@@ -389,7 +388,6 @@ LLVMRustBuildAtomicFence(LLVMBuilderRef B, LLVMAtomicOrdering Order,
 }
 
 enum class LLVMRustAsmDialect {
-  Other,
   Att,
   Intel,
 };