From a5aa0c46c3274eaf25dde4d792a1abd6191cccf9 Mon Sep 17 00:00:00 2001 From: Peter Collingbourne Date: Tue, 15 Apr 2025 11:12:05 -0700 Subject: Introduce -funique-source-file-names flag. The purpose of this flag is to allow the compiler to assume that each object file passed to the linker has been compiled using a unique source file name. This is useful for reducing link times when doing ThinLTO in combination with whole-program devirtualization or CFI, as it allows modules without exported symbols to be built with ThinLTO. Reviewers: vitalybuka, teresajohnson Reviewed By: teresajohnson Pull Request: https://github.com/llvm/llvm-project/pull/135728 --- clang/lib/CodeGen/CodeGenModule.cpp | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'clang/lib/CodeGen/CodeGenModule.cpp') diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp index 4a48c2f..26e09fe 100644 --- a/clang/lib/CodeGen/CodeGenModule.cpp +++ b/clang/lib/CodeGen/CodeGenModule.cpp @@ -1144,6 +1144,10 @@ void CodeGenModule::Release() { 1); } + if (CodeGenOpts.UniqueSourceFileNames) { + getModule().addModuleFlag(llvm::Module::Max, "Unique Source File Names", 1); + } + if (LangOpts.Sanitize.has(SanitizerKind::KCFI)) { getModule().addModuleFlag(llvm::Module::Override, "kcfi", 1); // KCFI assumes patchable-function-prefix is the same for all indirectly -- cgit v1.1