[llvm-bugs] [Bug 38011] New: Pragma metadata wrong for do-while loops resulting in wrong loop unrolling.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38011

            Bug ID: 38011
           Summary: Pragma metadata wrong for do-while loops resulting in
                    wrong loop unrolling.
           Product: clang
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: deepak2427 at gmail.com
                CC: llvm-bugs at lists.llvm.org

For do-while loops, the loop pragma metadata is attached to the wrong block.
This results in the LLVM loop unroller using the wrong unroll count.

The tests and the patch for the bug have been added to Phabricator,

https://reviews.llvm.org/D48721

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