[llvm-bugs] [Bug 38530] New: Compiler running infinitely since SVN r339472, "[ARM] Adjust AND immediates to make them cheaper to select"

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38530

            Bug ID: 38530
           Summary: Compiler running infinitely since SVN r339472, "[ARM]
                    Adjust AND immediates to make them cheaper to select"
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: ARM
          Assignee: unassignedbugs at nondot.org
          Reporter: martin at martin.st
                CC: llvm-bugs at lists.llvm.org

Created attachment 20682
  --> https://bugs.llvm.org/attachment.cgi?id=20682&action=edit
Test source file that triggers the bug

Since SVN r339472, "[ARM] Adjust AND immediates to make them cheaper to
select", the compiler seems to run forever when compiling certain source files.

To reproduce, compile the attached testcase with "clang -target
armv7-w64-mingw32 -c VbrTag.preproc.c -O2". (It also seems to behave similarly
with a target of armv7-linux-gnueabihf, but with more warnings.)

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