[all-commits] [llvm/llvm-project] ad1e10: [PowerPC] Require PPC32 for 32-bit addc/adde/subc/...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ad1e107a8c6d92605119b70183c4a38da86a663f
      https://github.com/llvm/llvm-project/commit/ad1e107a8c6d92605119b70183c4a38da86a663f
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2026-02-11 (Wed, 11 Feb 2026)

  Changed paths:
    M llvm/lib/Target/PowerPC/PPCInstrInfo.td

  Log Message:
  -----------
  [PowerPC] Require PPC32 for 32-bit addc/adde/subc/sube (#179186)

Unlike the base add/sub opcodes which will just overflow, these will
produce incorrect results, because the carry operates on the full
64-bits. Trying to use these with i32 operands on PPC64 should result in
a selection failure instead of a silent miscompile, like the one seen in
https://github.com/llvm/llvm-project/pull/178979.



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