[llvm] [CFIInstrInserter] A test showing the need to handle `cfi_escape`. (PR #128211)

[Craig Topper via llvm-commits]

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@@ -0,0 +1,88 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
+# RUN: llc %s -mtriple=riscv64 -mattr=+v \
+# RUN: -run-pass=prologepilog,cfi-instr-inserter  \
+# RUN: -riscv-enable-cfi-instr-inserter=true \
+# RUN: | FileCheck %s
+#
+# In this test prolog will be inserted in bb.3. We need to save the scalable vector register v1.
+# This will emit cfi_escape in bb.3. We need to emit the same cfi_escape in the begining of bb.2.
+# Currently, CFIInstrInserter doesn't handle escape, so we have wrong cfi in this example.
+
+--- |
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topperc wrote:

Do we need the IR section?

https://github.com/llvm/llvm-project/pull/128211