Apply summary-based dead stripping to regular LTO modules with summaries.
If a regular LTO module has a summary index, then instead of linking
it into the combined regular LTO module right away, add it to the
combined summary index and associate it with a special module that
represents the combined regular LTO module.
Any such modules are linked during LTO::run(), at which time we use
the results of summary-based dead stripping to control whether to
link prevailing symbols.
Differential Revision: https://reviews.llvm.org/D33922
llvm-svn: 305482
diff --git a/llvm/lib/LTO/LTOModule.cpp b/llvm/lib/LTO/LTOModule.cpp
index 331c51af..3cc8b7d 100644
--- a/llvm/lib/LTO/LTOModule.cpp
+++ b/llvm/lib/LTO/LTOModule.cpp
@@ -77,14 +77,12 @@
}
bool LTOModule::isThinLTO() {
- // Right now the detection is only based on the summary presence. We may want
- // to add a dedicated flag at some point.
- Expected<bool> Result = hasGlobalValueSummary(MBRef);
+ Expected<BitcodeLTOInfo> Result = getBitcodeLTOInfo(MBRef);
if (!Result) {
logAllUnhandledErrors(Result.takeError(), errs(), "");
return false;
}
- return *Result;
+ return Result->IsThinLTO;
}
bool LTOModule::isBitcodeForTarget(MemoryBuffer *Buffer,