[llvm] 9084934 - [ThinLTO][NFC] Add Module Name Debug Print when Generating Module Maps (#67820)

[via llvm-commits]

Author: Qiongsi Wu
Date: 2023-10-03T09:50:08-04:00
New Revision: 9084934aa95ce01dd2ab18f5b6eedbdf4fdddeae

URL: https://github.com/llvm/llvm-project/commit/9084934aa95ce01dd2ab18f5b6eedbdf4fdddeae
DIFF: https://github.com/llvm/llvm-project/commit/9084934aa95ce01dd2ab18f5b6eedbdf4fdddeae.diff

LOG: [ThinLTO][NFC] Add Module Name Debug Print when Generating Module Maps (#67820)

When computing the module maps, `ThinLTOCodeGenerator` asserts if it
sees duplicating module names. This PR adds a debug print, so that the
list of modules already added can be printed. With this information, one
can identify which modules are causing the duplication.

Added: 
    

Modified: 
    llvm/lib/LTO/ThinLTOCodeGenerator.cpp

Removed: 
    


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diff  --git a/llvm/lib/LTO/ThinLTOCodeGenerator.cpp b/llvm/lib/LTO/ThinLTOCodeGenerator.cpp
index acff1e2cf3b33b0..443439b71e7566c 100644
--- a/llvm/lib/LTO/ThinLTOCodeGenerator.cpp
+++ b/llvm/lib/LTO/ThinLTOCodeGenerator.cpp
@@ -151,6 +151,7 @@ static StringMap<lto::InputFile *>
 generateModuleMap(std::vector<std::unique_ptr<lto::InputFile>> &Modules) {
   StringMap<lto::InputFile *> ModuleMap;
   for (auto &M : Modules) {
+    LLVM_DEBUG(dbgs() << "Adding module " << M->getName() << " to ModuleMap\n");
     assert(!ModuleMap.contains(M->getName()) &&
            "Expect unique Buffer Identifier");
     ModuleMap[M->getName()] = M.get();