llvm-project

4a44f032 - [Clang][LTO] Fix use of funified-lto and save-temps flags together (#162763)

[Clang][LTO] Fix use of funified-lto and save-temps flags together (#162763) > clang -flto -funified-lto -save-temps test.c Fails with the following error message: ```bash module flag identifiers must be unique (or of 'require' type) !"UnifiedLTO" fatal error: error in backend: Broken module found, compilation aborted! clang: error: clang frontend command failed with exit code 70 (use -v to see invocation) ``` Here is what the driver does when `-save-temps` flag is set: > clang -flto -funified-lto -save-temps test.c -ccc-print-phases > +- 0: input, "test.c", c > +- 1: preprocessor, {0}, cpp-output > +- 2: compiler, {1}, ir > +- 3: backend, {2}, lto-bc > 4: linker, {3}, image The IR output of "compiler" step has "UnifiedLTO" module flag. "backend" step adds another module flag with "UnifiedLTO" identifier, which invalidates the LLVM IR module.