[LLVMbugs] [Bug 21700] New: UNREACHABLE executed at RegAllocFast.cpp:362

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Dec 1 02:44:45 PST 2014


            Bug ID: 21700
           Summary: UNREACHABLE executed at RegAllocFast.cpp:362
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: serge.guelton at telecom-bretagne.eu
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 13412
  --> http://llvm.org/bugs/attachment.cgi?id=13412&action=edit
faulty bytecode

The bytecode in attachment raises the following assert when compiled with

Instruction uses an allocated register
UNREACHABLE executed at

Turning all i32 into i64 fixes the issue, but according to the doc, GEP should
work for i32 indices.

compiling the code with llc does *not* trigger the bug...

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