[llvm-bugs] [Bug 45336] New: Output sections marked NOLOAD with no input sections are given type SHT_PROGBITS

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45336

            Bug ID: 45336
           Summary: Output sections marked NOLOAD with no input sections
                    are given type SHT_PROGBITS
           Product: lld
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: ELF
          Assignee: unassignedbugs at nondot.org
          Reporter: schultetwin1 at gmail.com
                CC: llvm-bugs at lists.llvm.org, smithp352 at googlemail.com

lld will ignore the NOLOAD annotation of output sections which have no
associated inputs sections.

Repro steps

1. Create a linker script with two output sections. One that contains an input
section and one that contains no input sections. The later should be marked as
NOLOAD.

```bash
echo "SECTIONS {
  .text : { *(.text) }
  .data_noload (NOLOAD) : { . += 1; }
};" > tmp.script
```

2. Create an output object which has some data in it

```bash
echo ".section .text,\"ax\", at progbits
  nop" > tmp.asm

llvm-mc -filetype=obj -triple=x86_64-unknown-linux tmp.asm -o tmp.o
```

3) Link the object file using the script

```bash
ld.lld -o tmp --script tmp.script tmp.o
```

4) Use readelf to dump the sections

```bash
llvm-readelf tmp -S -l
```

I expect to see .data_noload marked as NOBITS but instead I see it marked as
PROGBITS.

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