[llvm] 09146a2 - [LegacyLTO] Emit the error message that was silently dropped (#152172)

[via llvm-commits]

Author: Steven Wu
Date: 2025-08-06T09:13:36-07:00
New Revision: 09146a21a5a7bbea19b5203d585682de519a213c

URL: https://github.com/llvm/llvm-project/commit/09146a21a5a7bbea19b5203d585682de519a213c
DIFF: https://github.com/llvm/llvm-project/commit/09146a21a5a7bbea19b5203d585682de519a213c.diff

LOG: [LegacyLTO] Emit the error message that was silently dropped (#152172)

Using LLVMContext to emit the error from `TargetRegistry::lookupTarget`
that was silently ignored and not propagated. This allows user to better
identify the kind of error occured.

rdar://157542119

Added: 
    

Modified: 
    llvm/lib/LTO/LTOModule.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/LTO/LTOModule.cpp b/llvm/lib/LTO/LTOModule.cpp
index e0a975806a31d..7dd06118e2a57 100644
--- a/llvm/lib/LTO/LTOModule.cpp
+++ b/llvm/lib/LTO/LTOModule.cpp
@@ -203,8 +203,10 @@ LTOModule::makeLTOModule(MemoryBufferRef Buffer, const TargetOptions &options,
   // find machine architecture for this module
   std::string errMsg;
   const Target *march = TargetRegistry::lookupTarget(Triple, errMsg);
-  if (!march)
+  if (!march) {
+    Context.emitError(errMsg);
     return make_error_code(object::object_error::arch_not_found);
+  }
 
   // construct LTOModule, hand over ownership of module and target
   SubtargetFeatures Features;