Adrian Prantl fc5107cde6 Add debug location verification for !llvm.loop attachments. ...

This patch teaches the Verifier how to detect broken !llvm.loop
attachments as discussed in https://reviews.llvm.org/D60831. This
allows LLVM to warn and strip out the broken debug info before
attempting an LTO compilation with input generated by LLVM predating
https://reviews.llvm.org/rL361149.

rdar://problem/51631158

Differential Revision: https://reviews.llvm.org/D63499

[Re-applies r363725 without changes after fixing a broken testcase.]

llvm-svn: 363731

2019-06-18 20:09:09 +00:00

1017 B

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