3 files changed, 23 insertions, 11 deletions
diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
index 283c4fbbb7c..9884ed15b8a 100644
--- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
@@ -1607,8 +1607,13 @@ extern "C" void LLVMRustComputeLTOCacheKey(RustStringRef KeyOut,
   const auto &ExportList = Data->ExportLists.lookup(ModId);
   const auto &ResolvedODR = Data->ResolvedODR.lookup(ModId);
   const auto &DefinedGlobals = Data->ModuleToDefinedGVSummaries.lookup(ModId);
+#if LLVM_VERSION_GE(20, 0)
+  DenseSet<GlobalValue::GUID> CfiFunctionDefs;
+  DenseSet<GlobalValue::GUID> CfiFunctionDecls;
+#else
   std::set<GlobalValue::GUID> CfiFunctionDefs;
   std::set<GlobalValue::GUID> CfiFunctionDecls;
+#endif
 
   // Based on the 'InProcessThinBackend' constructor in LLVM
   for (auto &Name : Data->Index.cfiFunctionDefs())
@@ -1618,9 +1623,15 @@ extern "C" void LLVMRustComputeLTOCacheKey(RustStringRef KeyOut,
     CfiFunctionDecls.insert(
         GlobalValue::getGUID(GlobalValue::dropLLVMManglingEscape(Name)));
 
+#if LLVM_VERSION_GE(20, 0)
+  Key = llvm::computeLTOCacheKey(conf, Data->Index, ModId, ImportList,
+                                 ExportList, ResolvedODR, DefinedGlobals,
+                                 CfiFunctionDefs, CfiFunctionDecls);
+#else
   llvm::computeLTOCacheKey(Key, conf, Data->Index, ModId, ImportList,
                            ExportList, ResolvedODR, DefinedGlobals,
                            CfiFunctionDefs, CfiFunctionDecls);
+#endif
 
   LLVMRustStringWriteImpl(KeyOut, Key.c_str(), Key.size());
 }
diff --git a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
index 79a68b2ff0e..ed12318c88d 100644
--- a/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
@@ -913,14 +913,19 @@ extern "C" LLVMMetadataRef
 LLVMRustDIBuilderCreateFile(LLVMRustDIBuilderRef Builder, const char *Filename,
                             size_t FilenameLen, const char *Directory,
                             size_t DirectoryLen, LLVMRustChecksumKind CSKind,
-                            const char *Checksum, size_t ChecksumLen) {
+                            const char *Checksum, size_t ChecksumLen,
+                            const char *Source, size_t SourceLen) {
 
   std::optional<DIFile::ChecksumKind> llvmCSKind = fromRust(CSKind);
   std::optional<DIFile::ChecksumInfo<StringRef>> CSInfo{};
   if (llvmCSKind)
     CSInfo.emplace(*llvmCSKind, StringRef{Checksum, ChecksumLen});
+  std::optional<StringRef> oSource{};
+  if (Source)
+    oSource = StringRef(Source, SourceLen);
   return wrap(Builder->createFile(StringRef(Filename, FilenameLen),
-                                  StringRef(Directory, DirectoryLen), CSInfo));
+                                  StringRef(Directory, DirectoryLen), CSInfo,
+                                  oSource));
 }
 
 extern "C" LLVMMetadataRef
diff --git a/compiler/rustc_llvm/llvm-wrapper/SymbolWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/SymbolWrapper.cpp
index ccf1a5429e2..d625935d925 100644
--- a/compiler/rustc_llvm/llvm-wrapper/SymbolWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/SymbolWrapper.cpp
@@ -77,22 +77,18 @@ LLVMRustGetSymbols(char *BufPtr, size_t BufLen, void *State,
   Expected<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
       getSymbolicFile(Buf->getMemBufferRef(), Context);
   if (!ObjOrErr) {
-    Error E = ObjOrErr.takeError();
-    SmallString<0> ErrorBuf;
-    auto Error = raw_svector_ostream(ErrorBuf);
-    Error << E << '\0';
-    return ErrorCallback(Error.str().data());
+    return ErrorCallback(toString(ObjOrErr.takeError()).c_str());
   }
   std::unique_ptr<object::SymbolicFile> Obj = std::move(*ObjOrErr);
+  if (Obj == nullptr) {
+    return 0;
+  }
 
   for (const object::BasicSymbolRef &S : Obj->symbols()) {
     if (!isArchiveSymbol(S))
       continue;
     if (Error E = S.printName(SymName)) {
-      SmallString<0> ErrorBuf;
-      auto Error = raw_svector_ostream(ErrorBuf);
-      Error << E << '\0';
-      return ErrorCallback(Error.str().data());
+      return ErrorCallback(toString(std::move(E)).c_str());
     }
     SymName << '\0';
     if (void *E = Callback(State, SymNameBuf.str().data())) {