Zequan Wu 570033ed62 Add nomerge function attribute to supress tail merge optimization in simplifyCFG ... We want to add a way to avoid merging identical calls so as to keep the separate debug-information for those calls. There is also an asan usecase where having this attribute would be beneficial to avoid alternative work-arounds. Here is the link to the feature request: https://bugs.llvm.org/show_bug.cgi?id=42783. `nomerge` is different from `noline`. `noinline` prevents function from inlining at callsites, but `nomerge` prevents multiple identical calls from being merged into one. This patch adds `nomerge` to disable the optimization in IR level. A followup patch will be needed to let backend understands `nomerge` and avoid tail merge at backend. Reviewed By: asbirlea, rnk Differential Revision: https://reviews.llvm.org/D78659		2020-05-12 16:49:20 -07:00
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BitcodeAnalyzer.h
BitcodeReader.h	[DebugInfo] Change DIEnumerator payload type from int64_t to APInt	2020-04-18 12:49:31 -07:00
BitcodeWriter.h	[LTO] Support for embedding bitcode section during LTO	2019-12-12 12:34:19 -08:00
BitcodeWriterPass.h
LLVMBitCodes.h	Add nomerge function attribute to supress tail merge optimization in simplifyCFG	2020-05-12 16:49:20 -07:00