[llvm] [RemoveDIs] Read/write DbgRecords directly from/to bitcode (PR #83251)

[Jeremy Morse via llvm-commits]

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+;; Roundtrip tests.
+; RUN: llvm-as %s -o - | llvm-dis | FileCheck %s
+;; Check that verify-uselistorder passes regardless of input format.
+; RUN: llvm-as %s -o - | verify-uselistorder
+; RUN: verify-uselistorder %s
+
+;; Confirm we're producing RemoveDI records from various tools.
+; RUN: opt %s -o - | llvm-bcanalyzer - | FileCheck %s --check-prefix=BITCODE
+; RUN: llvm-as %s -o - | llvm-bcanalyzer - | FileCheck %s --check-prefix=BITCODE
+; BITCODE-DAG: DEBUG_RECORD_LABEL
+; BITCODE-DAG: DEBUG_RECORD_VALUE
+; BITCODE-DAG: DEBUG_RECORD_ASSIGN
+; BITCODE-DAG: DEBUG_RECORD_DECLARE
+
+;; Check that llvm-link doesn't explode if we give it different formats to
+;; link.
+; RUN: llvm-link %s --experimental-debuginfo-iterators=false < llvm-as %s --experimental-debuginfo-iterators=true
+; RUN: llvm-link %s --experimental-debuginfo-iterators=true < llvm-as %s --experimental-debuginfo-iterators=false
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jmorse wrote:

Pipe rather than '<'?

https://github.com/llvm/llvm-project/pull/83251