[all-commits] [llvm/llvm-project] 13549f: MCAssembler: Modify Contents when VarFixups is not...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 13549fd90af45d2200159cac14a12cf01db56aa1
      https://github.com/llvm/llvm-project/commit/13549fd90af45d2200159cac14a12cf01db56aa1
  Author: Fangrui Song <i at maskray.me>
  Date:   2025-07-17 (Thu, 17 Jul 2025)

  Changed paths:
    M llvm/lib/MC/MCAssembler.cpp

  Log Message:
  -----------
  MCAssembler: Modify Contents when VarFixups is not empty

When there is no VarFixup, VarContentStart is zero.
`slice(F.VarContentStart - Contents.size(), F.getSize())`
might lead to "runtime error: addition of unsigned offset to" in ubsan builds after #148544



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