[all-commits] [llvm/llvm-project] 993cbe: Two fixes for DISubrangeType (#130345)

[Tom Tromey via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 993cbead9e5c2385b93b7931b74c5d83dbadeb34
      https://github.com/llvm/llvm-project/commit/993cbead9e5c2385b93b7931b74c5d83dbadeb34
  Author: Tom Tromey <tromey at adacore.com>
  Date:   2025-03-07 (Fri, 07 Mar 2025)

  Changed paths:
    M llvm/docs/LangRef.rst
    M llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
    A llvm/test/DebugInfo/Generic/subrange_type.ll

  Log Message:
  -----------
  Two fixes for DISubrangeType (#130345)

My previous patch to add DISubrangeType (#126772) had a couple of minor
errors. This patch corrects them.

1. When using a DISubrangeType as an array index type, the wrong tag was
written into the DIE.

2. I'd intended for subranges to use bit strides, not byte strides --
but neglected to actually implement this. Ada needs bit strides.

This patch adds a new test that checks both these things.

Finally, this patch adds some documentation for DISubrangeType.



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