[LLVMbugs] [Bug 20909] New: Assertion failed: (!Is64BitMemOperand(MI, MemOperand)), function EmitOpcodePrefix

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=20909

            Bug ID: 20909
           Summary: Assertion failed: (!Is64BitMemOperand(MI,
                    MemOperand)), function EmitOpcodePrefix
           Product: libraries
           Version: 3.4
          Hardware: PC
                OS: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM assembly language parser
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm at tdprime.fastmail.fm
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 13020
  --> http://llvm.org/bugs/attachment.cgi?id=13020&action=edit
C code saved by dump

This bug is most similar to 12568.  However, Jim Grosbach assures me this one
is different and still crashes after the fix (apparently the checkin id is
missing).

$ clang -m32 -c -Wno-pointer-sign -Wno-parentheses-equality -nostdinc
-ffreestanding timpr.c 
Assertion failed: (!Is64BitMemOperand(MI, MemOperand)), function
EmitOpcodePrefix, file
/usr/home/timpr/workspace/llvm-3.4.2.src/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp,
line 1102.
Stack dump:
0.    Program arguments: /usr/local/bin/clang -cc1 -triple
i386-unknown-freebsd8.4 -emit-obj -mrelax-all -disable-free -main-file-name
timpr.c -mrelocation-model static -mdisable-fp-elim -masm-verbose
-mconstructor-aliases -target-cpu i486 -target-linker-version 2.15
-coverage-file /home/timpr/workspace/main/TOT/usr.src/netscaler/nsppe/timpr.o
-nostdsysteminc -nobuiltininc -resource-dir /usr/local/bin/../lib/clang/3.4.2
-Wno-pointer-sign -Wno-parentheses-equality -fdebug-compilation-dir
/home/timpr/workspace/main/TOT/usr.src/netscaler/nsppe -ferror-limit 19
-fmessage-length 80 -ffreestanding -mstackrealign -fobjc-runtime=gnustep
-fdiagnostics-show-option -fcolor-diagnostics -vectorize-slp -o timpr.o -x c
timpr.c 
1.    <eof> parser at end of file
2.    Code generation
3.    Running pass 'Function Pass Manager' on module 'timpr.c'.
4.    Running pass 'X86 Assembly / Object Emitter' on function
'@abc_cactor64_vaultbuf_next'
clang: error: unable to execute command: Abort trap: 6
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.4.2 (tags/RELEASE_34/dot2-final)
Target: i386-unknown-freebsd8.4
Thread model: posix

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