[llvm-bugs] [Bug 40208] New: failed cross compiling ffmpeg's av_sscanf (libavutil/avstring.h)

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Jan 2 16:31:47 PST 2019


            Bug ID: 40208
           Summary: failed cross compiling ffmpeg's av_sscanf
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: chcunningham at google.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

Created attachment 21286
  --> https://bugs.llvm.org/attachment.cgi?id=21286&action=edit
preprocessed source

Encountered while rolling latest ffmpeg into chromium. 

Cross compile info:

Host OS       : linux
Target OS     : android
Host arch     : x64
Target arch   : x64

Error output:

fatal error: error in backend: Cannot select: t81: ch = store<(store 8 into
%stack.6), trunc to f64> t0, t38, FrameIndex:i64<6>, undef:i64
  t38: f128,ch,glue = CopyFromReg t36, Register:f128 $xmm0, t36:1
    t37: f128 = Register $xmm0
    t36: ch,glue = callseq_end t35, TargetConstant:i64<0>,
TargetConstant:i64<0>, t35:1
      t7: i64 = TargetConstant<0>
      t7: i64 = TargetConstant<0>
      t35: ch,glue = X86ISD::CALL t33, TargetExternalSymbol:i64'__floatsitf'
[TF=6], Register:i32 $edi, RegisterMask:Untyped, t33:1
        t34: i64 = TargetExternalSymbol'__floatsitf' [TF=6]
        t11: i32 = Register $edi
        t14: Untyped = RegisterMask
        t33: ch,glue = CopyToReg t32, Register:i32 $edi, t22
          t11: i32 = Register $edi
          t22: i32 = AssertSext t20, ValueType:ch:i4
            t20: i32,ch = CopyFromReg t0, Register:i32 %260
              t19: i32 = Register %260
  t80: i64 = FrameIndex<6>
  t53: i64 = undef
In function: av_sscanf
clang: error: clang frontend command failed with exit code 70 (use -v to see
clang version 8.0.0 (trunk 349417)
Target: x86_64-unknown-linux-android
Thread model: posix
InstalledDir: /ssd/blink3/src/third_party/llvm-build/Release+Asserts/bin
clang: note: diagnostic msg: PLEASE submit a bug report to
https://bugs.llvm.org/ and include the crash backtrace, preprocessed source,
and associated run script.
clang: note: diagnostic msg: 

Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/avsscanf-6714ad.c
clang: note: diagnostic msg: /tmp/avsscanf-6714ad.sh
clang: note: diagnostic msg: 

/ssd/blink3/src/third_party/ffmpeg/ffbuild/common.mak:60: recipe for target
'libavutil/avsscanf.o' failed

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