[LLVMbugs] [Bug 23651] New: [Mips] -mabi=n32 option creates 64bit ELF file

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23651

            Bug ID: 23651
           Summary: [Mips] -mabi=n32 option creates 64bit ELF file
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: MIPS
          Assignee: unassignedbugs at nondot.org
          Reporter: kai at redstar.de
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 14382
  --> https://llvm.org/bugs/attachment.cgi?id=14382&action=edit
Demo file for compilation

Using the attached hello.ll on a mips64-unknown-linux-gnu machine:

localhost ldc # /build/work/llvm/bin/llc -filetype=obj -target-abi=n32 hello.ll
localhost ldc # file hello.o
hello.o: ELF 64-bit MSB relocatable, MIPS, MIPS64 version 1 (GNU/Linux), not
stripped
localhost ldc # /build/work/llvm/bin/llc -filetype=asm -target-abi=n32 hello.ll
localhost ldc # gcc -mabi=n32 -c hello.s
localhost ldc # file hello.o
hello.o: ELF 32-bit MSB relocatable, MIPS, N32 MIPS-III version 1 (SYSV), not
stripped
localhost ldc #

If I add -mattr=mips64 or -mattr=mips64r2 then I get the expected result:

localhost ldc # /build/work/llvm/bin/llc -filetype=asm -target-abi=n32
-mattr=mips64r2 hello.ll
localhost ldc # file hello.o
hello.o: ELF 32-bit MSB relocatable, MIPS, N32 MIPS64 rel2 version 1 (SYSV),
not stripped
localhost ldc # /build/work/llvm/bin/llc -filetype=asm -target-abi=n32
-mattr=mips64 hello.ll
localhost ldc # file hello.o
hello.o: ELF 32-bit MSB relocatable, MIPS, N32 MIPS64 rel2 version 1 (SYSV),
not stripped

(Note that in the last line the MIPS version is wrong: it should be MIPS64
version 1 (SYSV))

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