[LLVMbugs] [Bug 21240] New: llvm-mc tool hangs when -mcpu=help option is provided

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Fri Oct 10 05:00:22 PDT 2014


            Bug ID: 21240
           Summary: llvm-mc tool hangs when -mcpu=help option is provided
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: jyoti.allur at samsung.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

llvm-mc tool hangs when -mcpu=help option is provided

jyoti.allur at jyotiallur-ubuntu:~/Downloads/clang+llvm-3.2-x86_64-linux-ubuntu-12.04/bin$
llvm-mc -mcpu=help
[5]+  Stopped                 llvm-mc -mcpu=help

This is same behaviour in trunk as well as some old versions like 
llvm 3.4 & 3.2 versions.

Also if no files are provided to these tools, it should return an error
message, instead it hangs until ctrlC is used. This problem exists for llc as

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