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[ELF] - LTO: add test for createEmptyIndex. 

We have a following comment for createEmptyIndex caller code:

// If LazyObjFile has not been added to link, emit empty index files.
// This is needed because this is what GNU gold plugin does and we have a
// distributed build system that depends on that behavior.
  
Though createEmptyIndex() itself
(https://github.com/llvm-mirror/lld/blob/master/ELF/LTO.cpp#L202)
is never called in our test cases. 

Patch adds a test.

llvm-svn: 336270
This commit is contained in:
George Rimar 2018-07-04 13:36:45 +00:00
parent 29f37fbb8b
commit 6906f4ec9c
1 changed files with 5 additions and 0 deletions
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5
lld/test/ELF/lto/thinlto-index-only.ll
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@ -29,6 +29,11 @@
; RUN: ls %t2.o.thinlto.bc
; RUN: not test -e %t4
; Test that LLD generates an empty index even for lazy object file that is not added to link.
; RUN: rm -f %t1.o.thinlto.bc %t3
; RUN: ld.lld --plugin-opt=thinlto-index-only -shared %t2.o --start-lib %t1.o --end-lib -o %t3
; RUN: ls %t1.o.thinlto.bc
; NM: T f
; The backend index for this module contains summaries from itself and