[llvm] Add a test for multiple save locations of a CSR. (PR #164479)

[Craig Topper via llvm-commits]

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@@ -0,0 +1,35 @@
+# RUN: llc %s -mtriple=riscv64 \
+# RUN: -run-pass=cfi-instr-inserter \
+# RUN: -riscv-enable-cfi-instr-inserter=true
+# XFAIL: *
+
+# Technically, it is possible that the a callee-saved register is saved in different locations.
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topperc wrote:

"the a"?

https://github.com/llvm/llvm-project/pull/164479