Teresa Johnson 2b4369dd03 [ThinLTO] Handle bitcode without function summary sections gracefully ... Summary: Several fixes to the handling of bitcode files without function summary sections so that they are skipped during ThinLTO processing in llvm-lto and the gold plugin when appropriate instead of aborting. 1 Don't assert when trying to add a FunctionInfo that doesn't have a summary attached. 2 Skip FunctionInfo structures that don't have attached function summary sections when trying to create the combined function summary. 3 In both llvm-lto and gold-plugin, check whether a bitcode file has a function summary section before trying to parse the index, and skip the bitcode file if it does not. 4 Fix hasFunctionSummaryInMemBuffer in BitcodeReader, which had a bug where we returned to early while looking for the summary section. Also added llvm-lto and gold-plugin based tests for cases where we don't have function summaries in the bitcode file. I verified that either the first couple fixes described above are enough to avoid the crashes, or fixes 1,3,4. But have combined them all here for added robustness. Reviewers: joker.eph Subscribers: llvm-commits, joker.eph Differential Revision: http://reviews.llvm.org/D14903 llvm-svn: 253796		2015-11-21 21:55:48 +00:00
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CMakeLists.txt
llvm-lto.cpp	[ThinLTO] Handle bitcode without function summary sections gracefully	2015-11-21 21:55:48 +00:00
LLVMBuild.txt
Makefile