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Subject: [Bug c/98320] New: Parameter is malformed in the called function
Date: Wed, 16 Dec 2020 14:07:19 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98320

            Bug ID: 98320
           Summary: Parameter is malformed in the called function
           Product: gcc
           Version: 10.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ypn00vb at gmail dot com
  Target Milestone: ---

Created attachment 49779
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D49779&action=3Dedit
main function

When compiling with the -m64 option, one of the parameters passed to the
function is damaged. When compiling with the -m32 option, there is no damag=
e,
everything works.
PS. In the assembler listing, you can see that there is no instruction to m=
ove
the stack pointer with the -m64 option. Therefore, the assembler insertion =
of a
flag register push instruction overwrites the parameter in memory.=