[PATCH] D87615: [X86] Fix stack alignment on 32-bit Solaris/x86

[Rainer Orth via Phabricator via llvm-commits]

ro added a subscriber: vitalybuka.
ro added a comment.

In D87615#2273427 <https://reviews.llvm.org/D87615#2273427>, @ro wrote:

> 



> Tested on `amd64-pc-solaris2.11`.  However, compared to the `-mstackrealign` version
> there's one regression that I still need to investigate:
>
>   UBSan-Standalone-i386 :: TestCases/TypeCheck/vptr.cpp

This turns out to be just a whitespace difference: before the stack alignment patch I'd get for the `mS` subtest:

  Test case: mS
  /vol/llvm/src/llvm-project/dist/compiler-rt/test/ubsan/TestCases/TypeCheck/vptr.cpp:169:15: runtime error: member access within address 0xfeffdcf0 which does not point to an object of type 'T'
  0xfeffdcf0: note: object is of type 'S'
   76 62 92 92  ec 1b 06 08 00 00 00 00  44 de ff fe 30 dd ff fe  00 00 00 00 00 00 00 00  00 00 00 00
                ^~~~~~~~~~~
                vptr for 'S'

After the patch I see instead:

  Test case: mS
  /vol/llvm/src/llvm-project/dist/compiler-rt/test/ubsan/TestCases/TypeCheck/vptr.cpp:169:15: runtime error: member access within address 0xfeffdd34 which does not point to an object of type 'T'
  0xfeffdd34: note: object is of type 'S'
    76 62 92 92 ec 1b 06 08  00 00 00 00 78 dd ff fe  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
                ^~~~~~~~~~~
                vptr for 'S'

i.e. one additional blank at the beginning of the line and a different grouping.  I have no idea about the significance of those: @vitalybuka?


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https://reviews.llvm.org/D87615