[llvmlinux] [LLVMdev] [LLVMLinux] Regression: rev 208833/208834 break linux kernel build in ASM handling

Eric Christopher echristo at google.com
Fri May 16 21:13:01 UTC 2014


Should be fixed now.

-eric


On Fri, May 16, 2014 at 12:40 PM, Nick Lewycky <nlewycky at google.com> wrote:

> On 16 May 2014 06:01, Jan-Simon Möller <dl9pf at gmx.de> wrote:
>
>> Hi !
>>
>> Our buildbot found this regression while compiling the kernel with clang:
>>
>> A bisection points to
>>
>> 475ac5d302ba84ac13d34a9215c29c1a38ca5690 is the first bad commit
>> commit 475ac5d302ba84ac13d34a9215c29c1a38ca5690
>> Author: Eric Christopher <echristo at gmail.com>
>> Date:   Thu May 15 01:10:50 2014 +0000
>>
>>     Unify command line handling of MCTargetOptions and remove extra
>>     options and code. No functional change.
>>
>>     git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208833
>> 91177308-0d34-0410-b5e6-96231b3b80d8
>>
>> 8454a4b9373bca5d2a8f596ef1c33826171729bd is the first bad commit
>> commit 8454a4b9373bca5d2a8f596ef1c33826171729bd
>> Author: Eric Christopher <echristo at gmail.com>
>> Date:   Thu May 15 01:21:56 2014 +0000
>>
>>     Fill in the options in the MCOptions struct directly like the other
>>     options.
>>
>>     git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208834
>> 91177308-0d34-0410-b5e6-96231b3b80d8
>>
>>
>> Before:
>>
>> http://buildbot.llvm.linuxfoundation.org/builders/2_llvm/builds/8/steps/shell_3/logs/stdio
>>
>> After:
>>
>> http://buildbot.llvm.linuxfoundation.org/builders/2_llvm/builds/41/steps/shell_3/logs/stdio
>>
>> --- snip ---
>> /tmp/vfpmodule-0d3341.s: Assembler messages:
>> /tmp/vfpmodule-0d3341.s:64: Error: junk at end of line, first unrecognized
>> character is `"'
>> /tmp/vfpmodule-0d3341.s:65: Error: junk at end of line, first unrecognized
>> character is `"'
>> /tmp/vfpmodule-0d3341.s:66: Error: junk at end of line, first unrecognized
>> character is `"'
>> --- snip ---
>>
>
> I found the same thing.
>
> The problem is that the 3-arg form of .file is now backwards w.r.t.
> setting of integrated assembler. To reproduce:
>
> $ clang -no-integrated-as -S a/x.c -o - -g | grep file
> .file 1 "a" "x.c"
>
> vs.
>
> $ clang -S a/x.c -o - -g | grep file
> .file 1 "a/x.c"
>
> Binutils doesn't support the 3-arg format, so unless we know we're using
> the integrated assembler we can't emit that. As I recall, clang -S would
> emit the 2-argument form unless you passed -integrated-as -S on the
> command-line.
>
> Nick
>
>> Current state can be tracked:
>> http://buildbot.llvm.linuxfoundation.org/waterfall?show=2_llvm
>>
>>
>> Can we fix or revert pls ?
>>
>> --
>>
>> Dipl.-Ing.
>> Jan-Simon Möller
>>
>> jansimon.moeller at gmx.de
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>
>
>
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