[llvm-bugs] [Bug 35918] New: Skylake codegen broken after r322279

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=35918

            Bug ID: 35918
           Summary: Skylake codegen broken after r322279
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: release blocker
          Priority: P
         Component: Backend: X86
          Assignee: llvm-dev at redking.me.uk
          Reporter: dlj at google.com
                CC: dlj at google.com, llvm-bugs at lists.llvm.org

Created attachment 19661
  --> https://bugs.llvm.org/attachment.cgi?id=19661&action=edit
IR generated by Mesa3d llvmpipe test case PIPE_FORMAT_R16G16_SNORM

This error was uncovered through llvmpipe tests from mesa3d.org. The failing
cases are:

Testing PIPE_FORMAT_R16G16_SNORM (unorm8) ...
Testing PIPE_FORMAT_R16G16_SSCALED (unorm8) ...


I've attached the IR from one of the failing test cases
(PIPE_FORMAT_R16G16_SNORM). (I will also attach the output from `llc
-mcpu=skylake` at r322279 and the one before.)

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