[all-commits] [llvm/llvm-project] 296fdd: Allow DW_OP_rot, DW_OP_neg, and DW_OP_abs in DIExp...

[Tom Tromey via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 296fddc89e23b33055ff3f7ccb55de6c47dac757
      https://github.com/llvm/llvm-project/commit/296fddc89e23b33055ff3f7ccb55de6c47dac757
  Author: Tom Tromey <tromey at adacore.com>
  Date:   2025-10-03 (Fri, 03 Oct 2025)

  Changed paths:
    M llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp
    M llvm/lib/IR/DebugInfoMetadata.cpp
    A llvm/test/Bitcode/DW_OP_rot_neg_abs.ll

  Log Message:
  -----------
  Allow DW_OP_rot, DW_OP_neg, and DW_OP_abs in DIExpression (#160757)

The Ada front end can emit somewhat complicated DWARF expressions for
the offset of a field. While working in this area I found that I needed
DW_OP_rot (to implement a branch-free computation -- it looked more
difficult to add support for branching); and DW_OP_neg and DW_OP_abs
(just basic functionality).



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