[all-commits] [llvm/llvm-project] d606e2: [MC] Support constant offset for symbol PendingFixup

[luxufan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d606e23305015f14072ed59e8e71d6b27d010b48
      https://github.com/llvm/llvm-project/commit/d606e23305015f14072ed59e8e71d6b27d010b48
  Author: luxufan <932494295 at qq.com>
  Date:   2022-01-26 (Wed, 26 Jan 2022)

  Changed paths:
    M llvm/lib/MC/MCObjectStreamer.cpp
    M llvm/test/MC/RISCV/reloc-directive.s

  Log Message:
  -----------
  [MC] Support constant offset for symbol PendingFixup

This patch add support relocation offset of sym+constant(like `foo+4`) form for pending fixup.

In the past, llvm-mc ignored the constant in sym+constant form, for `foo+4`, `4` would be ignored. And test case
```
.text
  ret
  nop
  nop
  .reloc foo+4, R_RISCV_32, 6

.data
.globl foo
foo:
  .word 0
  .word 0
  .word 0
```
when run `llvm-mc -filetype=obj -triple=riscv64 %s | llvm-readobj -r`
The output is
```
Relocations [
  Section (3) .rela.text {
    0x0 R_RISCV_32 - 0x6
  }
]
```

After applying this patch, the output is
```
Relocations [
  Section (3) .rela.text {
    0x4 R_RISCV_32 - 0x6
  }
]
```

Differential Revision: https://reviews.llvm.org/D117316