[lld] [llvm] [DTLTO][LLD][ELF] Add support for Integrated Distributed ThinLTO (PR #142757)

[via llvm-commits]

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+# REQUIRES: x86
+
+# Test that DTLTO options are a no-op if no thinLTO is performed.
+
+RUN: rm -rf %t && split-file %s %t && cd %t
+
+RUN: opt t1.ll -o t1.o -O2
+RUN: opt t2.ll -o t2.o -O2
+
+# Common command-line arguments. Note that mock.py does not do any compilation;
+# instead, it simply writes the contents of the object files supplied on the
+# command line into the output object files in job order.
+RUN: echo "t1.o t2.o \
+RUN:   --thinlto-distributor=%python \
+RUN:   --thinlto-distributor-arg=%llvm_src_root/utils/dtlto/mock.py \
+RUN:   --thinlto-distributor-arg=no-exist1.o \
+RUN:   --thinlto-distributor-arg=no-exist2.o" > l.rsp
+
+# Check linking succeeds when all input files are Full LTO.
+RUN: ld.lld @l.rsp
+
+RUN: llc -filetype=obj t1.ll -o t1.o
+RUN: llc -filetype=obj t2.ll -o t2.o
+
+# Check linking succeeds when all input files are ET_RELs.
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bd1976bris wrote:

Thanks. I have added a commit to address this.

https://github.com/llvm/llvm-project/pull/142757