[cfe-dev] about debug

[唐启锋]

    Hi,
   I wish to get the line number of source code in IR code. And I know that debuginfo.h will  suit to me. However, I met some problem about using the -g option.
   I have writtern a pass ,but I don't know how to run the pass with debug information. While I want to get the bc file with the debug information ,I have to use the 
command "llvm-gcc -g -c -emit-llvm test.c -o test.bc". But I don't know what to do next. I try to run the command "lli test.bc". It will run error as follow
UNREACHABLE executed!
0  lli 0x0864a9d9
Stack dump:
0. Program arguments: lli t2.bc 
1. Running pass 'X86 Machine Code Emitter' on function '@main'
  If you follow the steps above ,there will be an error for all the test file .Would you please explain the right steps for me?
    Thanks!
                                                                                                                    Tang 		 	   		  
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