[llvm-bugs] [Bug 40296] New: Assertion failed in function processTiedPairs

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=40296

            Bug ID: 40296
           Summary: Assertion failed in function processTiedPairs
           Product: new-bugs
           Version: 7.0
          Hardware: PC
                OS: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: danilo at FreeBSD.org
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

Hello, I'm getting an assertion failure building this project [1] on FreeBSD 13
using clang 7.0.1:

$ cc -Daws_checksums_EXPORTS
-I/usr/ports/devel/aws-checksums/work/aws-checksums-0.1.2/include
-I/usr/ports/devel/aws-checksums/work/aws-checksums-0.1.2/tests -O2 -pipe 
-fstack-protector -fno-strict-aliasing -O2 -pipe  -fstack-protector
-fno-strict-aliasing -fPIC   -fPIC -std=gnu99 -MD -MT
CMakeFiles/aws-checksums.dir/source/intel/crc32c_sse42_asm.c.o -MF
CMakeFiles/aws-checksums.dir/source/intel/crc32c_sse42_asm.c.o.d -o
CMakeFiles/aws-checksums.dir/source/intel/crc32c_sse42_asm.c.o   -c
/usr/ports/devel/aws-checksums/work/aws-checksums-0.1.2/source/intel/crc32c_sse42_asm.c
-O3
Assertion failed: (i == DstIdx || !MI->getOperand(i).isReg() ||
MI->getOperand(i).getReg() != RegA), function processTiedPairs, file
/usr/src/contrib/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp, line 1544.
cc: error: unable to execute command: Abort trap (core dumped)
cc: error: clang frontend command failed due to signal (use -v to see
invocation)
FreeBSD clang version 7.0.1 (tags/RELEASE_701/final 349250) (based on LLVM
7.0.1)

This is the file:
https://github.com/awslabs/aws-checksums/blob/master/source/intel/crc32c_sse42_asm.c

It seems LLVM is triggering this assert because the inline assembly is not in
SSA form. Inline assembly is not supposed to be emitted as it is?

For convenience, here is the assertion code:
https://github.com/llvm-project/llvm/blob/master/lib/CodeGen/TwoAddressInstructionPass.cpp?#L1545

Thanks in advance.

Danilo.

[1] - https://github.com/awslabs/aws-checksums

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20190111/090dc40a/attachment.html>