1 files changed, 14 insertions, 0 deletions

diff --git a/contrib/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp b/contrib/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp
index 1280bcd36de9..eb13cd40eb8a 100644
--- a/contrib/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/contrib/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp
@@ -67,6 +67,7 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ConvertUTF.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/RISCVISAInfo.h"
 #include "llvm/Support/TimeProfiler.h"
 #include "llvm/Support/xxhash.h"
 #include "llvm/TargetParser/Triple.h"
@@ -1059,6 +1060,19 @@ void CodeGenModule::Release() {
     llvm::LLVMContext &Ctx = TheModule.getContext();
     getModule().addModuleFlag(llvm::Module::Error, "target-abi",
                               llvm::MDString::get(Ctx, ABIStr));
+
+    // Add the canonical ISA string as metadata so the backend can set the ELF
+    // attributes correctly. We use AppendUnique so LTO will keep all of the
+    // unique ISA strings that were linked together.
+    const std::vector<std::string> &Features =
+        getTarget().getTargetOpts().Features;
+    auto ParseResult = llvm::RISCVISAInfo::parseFeatures(
+        Arch == llvm::Triple::riscv64 ? 64 : 32, Features);
+    if (!errorToBool(ParseResult.takeError()))
+      getModule().addModuleFlag(
+          llvm::Module::AppendUnique, "riscv-isa",
+          llvm::MDNode::get(
+              Ctx, llvm::MDString::get(Ctx, (*ParseResult)->toString())));
   }
 
   if (CodeGenOpts.SanitizeCfiCrossDso) {