[fpc-devel]Bug 1222 continued ...

[Michael Knapp]

compiled with snapshot ppc386 go32v2 ver 1.1 [2000/12/16]
asm source and comments see below

CONST
    c1=$80000000;
    c2=$80000001;
    c3=$80000002;
    c4=$80000003;
    cm=$80000007;

VAR v:dword;

BEGIN
  v:=c2;
  CASE (v AND cm) OF
    c1,c2:writeln('case c1,c2');
    c3,c4:writeln('case c3,c4');
    ELSE writeln('case failed, but it should not');
  END;
END.

{
  .file "bug1222.pas"

.text
  .balign 16
# [bug1222.pas]
# [13] BEGIN
.globl  _main
_main:
.globl  PASCALMAIN
PASCALMAIN:
.globl  program_init
program_init:
  pushl  %ebp
  movl  %esp,%ebp
  subl  $4,%esp
  call  FPC_INITIALIZEUNITS
# [14] v:=c2;
  movl  $-2147483647,_V
# [15] CASE (v AND cm) OF
  movl  _V,%eax               EAX := 80000001
  xorl  %edx,%edx             EDX := 00000000
  andl  .L13,%eax             EAX := 80000001  .L13   = 80000007
  andl  .L13+4,%edx           EDX := 00000000  .L13+4 = 00000000
  cmpl  $-1,%edx              00000000 - (-1) = -1   EDX is always 0 in
that case
  jl  .L12                    jumps to .L12   { that shouldn't be }
  jg  .L14
  cmpl  $-2147483648,%eax
  jb  .L12
.L14:
  cmpl  $-1,%edx
  jl  .L3
  jg  .L15
  cmpl  $-2147483647,%eax
  jbe  .L3
.L15:
  cmpl  $-1,%edx
  jl  .L6
  jg  .L16
  cmpl  $-2147483645,%eax
  jbe  .L6
.L16:
  jmp  .L12
.L6:
.L17:
# [17] c3,c4:writeln('case c3,c4');
  leal  U_SYSTEM_OUTPUT,%edi
  movl  %edi,-4(%ebp)
  pushl  $.L20
  pushl  -4(%ebp)
  pushl  $0
  call  FPC_WRITE_TEXT_SHORTSTR
  pushl  -4(%ebp)
  call  FPC_WRITELN_END
  pushl  $.L17
  call  FPC_IOCHECK
  jmp  .L11
.L3:
.L21:
# [16] c1,c2:writeln('case c1,c2');
  leal  U_SYSTEM_OUTPUT,%edi
  movl  %edi,-4(%ebp)
  pushl  $.L24
  pushl  -4(%ebp)
  pushl  $0
  call  FPC_WRITE_TEXT_SHORTSTR
  pushl  -4(%ebp)
  call  FPC_WRITELN_END
  pushl  $.L21
  call  FPC_IOCHECK
  jmp  .L11
.L12:
.L25:
# [18] ELSE writeln('case failed, but it should not');
  leal  U_SYSTEM_OUTPUT,%edi
  movl  %edi,-4(%ebp)
  pushl  $.L28
  pushl  -4(%ebp)
  pushl  $0
  call  FPC_WRITE_TEXT_SHORTSTR
  pushl  -4(%ebp)
  call  FPC_WRITELN_END
  pushl  $.L25
  call  FPC_IOCHECK
.L11:
# [20] END.
  call  FPC_DO_EXIT
  leave
  ret
  .balign 16

.data
  .ascii  "FPC 1.1 [2000/12/16] for i386 - GO32V2"
  .balign 4
.globl  FPC_RESOURCESTRINGTABLES
FPC_RESOURCESTRINGTABLES:
  .long  0
.globl  INITFINAL
INITFINAL:
  .long  1,0
  .long  INIT$$SYSTEM
  .long  0
.globl  HEAPSIZE
HEAPSIZE:
  .long  2097152
.globl  __stklen
__stklen:
  .long  16384

.data
.L13:
  .long  -2147483641,0
.L20:
  .ascii  "\012case c3,c4\000"
.L24:
  .ascii  "\012case c1,c2\000"
.L28:
  .ascii  "\036case failed, but it should not\000"

.data

.bss
# [11] VAR v:dword;
  .lcomm  _V,4
  .comm  HEAP,2097152

}

-- 
+--------------------------------------------------------------------+
|  Michael Knapp - Mauerbach - Niederösterreich - Austria - Europe   |
|  E-Mail: mknapp at gmx.at                             ICQ: 36542787   |
+--------------------------------------------------------------------+
| G r a p h i X            http://programmierer.freepage.de/graphix/ |
| Graphics Library for Freepascal, Virtual Pascal and Borland Pascal | 
| http://graphix4pascal.cjb.net/    http://www.graphix4pascal.de.vu/ |
+--------------------------------------------------------------------+