[LLVMbugs] [Bug 20903] New: Mesa llvmpipe lp_test_blend regression

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=20903

            Bug ID: 20903
           Summary: Mesa llvmpipe lp_test_blend regression
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Keywords: regression
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: vlee at freedesktop.org
                CC: brian.e.paul at gmail.com, jfonseca at vmware.com,
                    llvmbugs at cs.uiuc.edu, rafael.espindola at gmail.com,
                    sroland at vmware.com
    Classification: Unclassified

Mesa unit test lp_test_blend regressed starting at llvm-3.6.0svn r217548.

$ ./build/linux-x86_64-debug/bin/lp_test_blend
 type=u8nx16 rgb_func=sub rgb_src_factor=zero rgb_dst_factor=inv_src_color
alpha_func=rev_sub alpha_src_factor=one alpha_dst_factor=const_color ...
MISMATCH
  Src:  0  0  0 d2  0 c0 94  0  0  0 bb 35 28 40 9e 49
  Src1:  0 23  0  0 f7 51  0  8  0 cf bb 99  0 7d 3c a2
  Dst:  0  0  0 b3 eb 41 d1  0 81  0  0 22  0  0 67 6b
  Con:  0  0 76 e1  0  0  0  0 3e  0  0  0  0  0  0 17
  Res:  0  0  0 70  0  0  0  0  0  0  0  0  0  0  0  0
  Ref:  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
 type=u8nx16 rgb_func=rev_sub rgb_src_factor=zero rgb_dst_factor=const_alpha
alpha_func=rev_sub alpha_src_factor=one alpha_dst_factor=inv_dst_alpha ...
MISMATCH
  Src: be  0  0 64  0  0  0  2  0  0  0  0  0 5f c6  0
  Src1:  0  0  0  0  0  0 f0 8a  0 59 94  0 33  0  0  0
  Dst: 4d  0 49 a8  7 6a  0 57  0 cb a2  0  0 cf  0  0
  Con: 83  0  0  0  0 9d 97  0 a5  0 b6 1e  0 5c  0  9
  Res:  0  0  0  0  0  0  0  0  0 18 13  0  0  7  0  0
  Ref:  0  0  0  0  0  0  0 37  0 18 13  0  0  7  0  0
 type=u8nx16 rgb_func=add rgb_src_factor=one rgb_dst_factor=const_color
alpha_func=min alpha_src_factor=zero alpha_dst_factor=inv_src1_color ...
MISMATCH
  Src:  0  0 61  0  0 bb  0  0  0 d0 4d  0  0  0 b6 14
  Src1: 8a 76  0  0  0 33  0  0  0  0  0  0 f4  7 b5 24
  Dst: 87  0 b5 ef  0 a0  0 ba  0  0 cf bb c0  0  0  0
  Con:  0  0 ea  0  0  0  0 76  0 2b  0 70 a9 ec 77 ed
  Res:  0  0 ff  0  0 45  0  0  0 30 b4  0 7f  0 4a  0
  Ref:  0  0 ff  0  0 bb  0  0  0 d0 4d  0 7f  0 b6  0


# first bad commit: [3b670550ad8b4e77bae1cf265f73ea814b8a9cd5] Add
doInitialization/doFinalization to DataLayoutPass.


commit 3b670550ad8b4e77bae1cf265f73ea814b8a9cd5
Author: Rafael Espindola <rafael.espindola at gmail.com>
Date:   Wed Sep 10 21:27:43 2014 +0000

    Add doInitialization/doFinalization to DataLayoutPass.

    With this a DataLayoutPass can be reused for multiple modules.

    Once we have doInitialization/doFinalization, it doesn't seem necessary to
pass
    a Module to the constructor.

    Overall this change seems in line with the idea of making DataLayout a
required
    part of Module. With it the only way of having a DataLayout used is to add
it
    to the Module.

    git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217548
91177308-0d34-0410-b5e6-96231b3b80d8

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