diff options
| -rw-r--r-- | tools/lto/LTOCodeGenerator.cpp | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/tools/lto/LTOCodeGenerator.cpp b/tools/lto/LTOCodeGenerator.cpp index f0640c2206..0e61c2fb2a 100644 --- a/tools/lto/LTOCodeGenerator.cpp +++ b/tools/lto/LTOCodeGenerator.cpp @@ -46,10 +46,13 @@ #include "llvm/ADT/StringExtras.h" using namespace llvm; -static cl::opt<bool> DisableInline("disable-inlining", +static cl::opt<bool> EnableInternalizing("enable-internalizing", cl::init(false), + cl::desc("Internalize functions during LTO")); + +static cl::opt<bool> DisableInline("disable-inlining", cl::init(false), cl::desc("Do not run the inliner pass")); -static cl::opt<bool> DisableGVNLoadPRE("disable-gvn-loadpre", +static cl::opt<bool> DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false), cl::desc("Do not run the GVN load PRE pass")); const char* LTOCodeGenerator::getVersionString() { @@ -275,6 +278,14 @@ static void findUsedValues(GlobalVariable *LLVMUsed, } void LTOCodeGenerator::applyScopeRestrictions() { + // Internalize only if specifically asked for. Otherwise, global symbols which + // exist in the final image, but which are used outside of that image + // (e.g. bundling) may be removed. This also happens when a function is used + // only in inline asm. LLVM doesn't recognize that as a "use", so it could be + // stripped. + if (!EnableInternalizing) + return; + if (_scopeRestrictionsDone) return; Module *mergedModule = _linker.getModule(); |