[Bug d/98921] New: [11 regression] libphobos: junk in generated symbol

[schwab--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98921

            Bug ID: 98921
           Summary: [11 regression] libphobos: junk in generated symbol
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
          Reporter: sch...@linux-m68k.org
  Target Milestone: ---
            Target: powerpc64-*-*

$ /daten/gcc/gcc-20210201/Build/./gcc/gdc
-B/daten/gcc/gcc-20210201/Build/./gcc/ -B/usr/powerpc64-suse-linux/bin/
-B/usr/powerpc64-suse-linux/lib/ -isystem /usr/powerpc64-suse-linux/include
-isystem /usr/powerpc64-suse-linux/sys-include -fPIC -Wall -frelease -O2 -g
-nostdinc -I ../../../../libphobos/libdruntime -I . -c
../../../../libphobos/libdruntime/core/thread/fiber.d -fversion=Shared -o
core/thread/.libs/fiber.o
/tmp/ccWwQCKJ.s: Assembler messages:
/tmp/ccWwQCKJ.s:2410: Error: junk at end of line, first unrecognized character
is `Z'
/tmp/ccWwQCKJ.s:2411: Error: junk at end of line, first unrecognized character
is `-'
/tmp/ccWwQCKJ.s:2414: Error: unrecognized symbol type ""
/tmp/ccWwQCKJ.s:2414: Error: junk at end of line, first unrecognized character
is `-'
/tmp/ccWwQCKJ.s:2415: Error: expected comma after name
`_D6object__T10RTInfoImplVAmA4i1536i549755827528i144115188075855872N' in .size
directive
/tmp/ccWwQCKJ.s:2416: Error: unrecognized opcode:
`_d6object__t10rtinfoimplvama4i1536i549755827528i144115188075855872n-9223372036854775808ZQCyyG4m:'
/tmp/ccWwQCKJ.s:3269: Error: junk at end of line, first unrecognized character
is `Z'


        .section       
.data.rel._D4core6thread5fiber5Fiber7__ClassZ,"awG",@progbits,_D4core6thread5fiber5Fiber7__ClassZ,comdat
        .align 3
        .type   _D4core6thread5fiber5Fiber7__ClassZ, @gnu_unique_object
        .size   _D4core6thread5fiber5Fiber7__ClassZ, 152
_D4core6thread5fiber5Fiber7__ClassZ:
        .quad   _D14TypeInfo_Class6__vtblZ
        .quad   0
        .quad   1536
        .quad   _D4core6thread5fiber5Fiber6__initZ
        .quad   23
        .quad   _D4core6thread5fiber5Fiber7__ClassZ.3110
        .quad   5
        .quad   _D4core6thread5fiber5Fiber6__vtblZ
        .quad   0
        .quad   0
        .quad   _D6Object7__ClassZ
        .quad   _D4core6thread5fiber5Fiber6__dtorMFNbNiZv
        .quad   0
        .long   316
        .zero   4
        .quad   0
        .quad   0
        .quad   0
        .quad   0
        .quad  
_D6object__T10RTInfoImplVAmA4i1536i549755827528i144115188075855872N-9223372036854775808ZQCyyG4m
        .weak  
_D6object__T10RTInfoImplVAmA4i1536i549755827528i144115188075855872N-9223372036854775808ZQCyyG4m
        .section       
.data._D6object__T10RTInfoImplVAmA4i1536i549755827528i144115188075855872N-9223372036854775808ZQCyyG4m,"awG",@progbits,_D6object__T10RTInfoImplVAmA4i1536i549755827528i144115188075855872N-9223372036854775808ZQCyyG4m,comdat
        .align 3
        .type  
_D6object__T10RTInfoImplVAmA4i1536i549755827528i144115188075855872N-9223372036854775808ZQCyyG4m,
@gnu_unique_object
        .size  
_D6object__T10RTInfoImplVAmA4i1536i549755827528i144115188075855872N-9223372036854775808ZQCyyG4m,
32
_D6object__T10RTInfoImplVAmA4i1536i549755827528i144115188075855872N-9223372036854775808ZQCyyG4m:
        .quad   1536
        .quad   549755827528
        .quad   144115188075855872
        .quad   -9223372036854775808
        .internal       _D4core6thread5fiber5Fiber7__ClassZ.3110
        .weak   _D4core6thread5fiber5Fiber7__ClassZ.3110

This appears to be an overflow bug in Mangler::visit(IntegerExp*),
-9223372036854775808 is 0x8000000000000000.