[llvm-bugs] [Bug 33227] New: Defect with llvm::reverse used in for loop with a comparison

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33227

            Bug ID: 33227
           Summary: Defect with llvm::reverse used in for loop with a
                    comparison
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Support Libraries
          Assignee: unassignedbugs at nondot.org
          Reporter: colsebas at hotmail.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 18539
  --> https://bugs.llvm.org/attachment.cgi?id=18539&action=edit
Example

std::vector<unsigned> V(10);
for (unsigned I : Fwd ? V : llvm::reverse(V))
  llvm::errs() << I << "\n";

In this example compilation succeeds without even a warning but failure occurs
when Fwd is true.

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