[LLVMbugs] [Bug 21878] New: Regression(r223757): Assertion failed: isImm() && "Wrong MachineOperand accessor", file D:\src\llvm\include\llvm/CodeGen/MachineOperand.h, line 408

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21878

            Bug ID: 21878
           Summary: Regression(r223757): Assertion failed: isImm() &&
                    "Wrong MachineOperand accessor", file
                    D:\src\llvm\include\llvm/CodeGen/MachineOperand.h,
                    line 408
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: nicolasweber at gmx.de
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

We're seeing

Assertion failed: isImm() && "Wrong MachineOperand accessor", file
D:\src\llvm\include\llvm/CodeGen/MachineOperand.h, line 408

about 300 times when building Chromium with clang on Windows. This regressed in
r223757.

Upstream bug: https://code.google.com/p/chromium/issues/detail?id=441053

I'll have a reduced version on Friday. Until then, here's an unreduced version
(change the clang-cl.exe thing in the .sh file to your local clang binary; as
long as you build with assertions it'll repro on linux and mac too with that
.sh file)

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