[Bug target/25196] New: i386: wrong arguments passed

["markus at oberhumer dot com" <gcc-bugzilla at gcc dot gnu dot org>]

I really had a hard time tracking this down from a large program: gcc 4.0.2 on
i386-linux sometimes passes wrong arguments.

Please try the attached source file on i386 with "gcc-4.0.2 -march=i386 -O3
-fomit-frame-pointer".

When looking at the disassembly of f2() it seems that %edi is incorrectly used
twice:

  5e:   89 f8                   mov    %edi,%eax   !!!!!
  60:   ff 74 24 24             pushl  0x24(%esp)
  64:   55                      push   %ebp
  65:   89 f9                   mov    %edi,%ecx   !!!!!
  67:   89 da                   mov    %ebx,%edx
  69:   e8 92 ff ff ff          call   0 <f1>

This wrong-code bug is probably a 3.2, 3.3 and 3.4 regression.

~Markus


-- 
           Summary: i386: wrong arguments passed
           Product: gcc
           Version: 4.0.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: markus at oberhumer dot com
  GCC host triplet: i386-pc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25196