[clang] [lld] [llvm] Integrated Distributed ThinLTO (DTLTO): Initial support (PR #126654)

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+# REQUIRES: x86
+
+## Check that DTLTO handles imports files correctly.
+
+# RUN: rm -rf %t.dir && split-file %s %t.dir && cd %t.dir
+
+## Compile bitcode.
+# RUN: opt -module-summary 0.ll -o 0.o -O2
+# RUN: opt -module-summary 1.ll -o 1.o -O2
+
+## Common command line arguments. Note that the use of validate.py will cause
+## the link to fail.
+# RUN: echo "0.o 1.o \
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bd1976bris wrote:

I can't work out how to do this. I think I need a `RUN:` line to expand the variables.

https://github.com/llvm/llvm-project/pull/126654