[LV] Skip low-trip count logic there is no scalar tail. (#225633)
https://github.com/llvm/llvm-project/pull/195823 added logic consider
vectorization of low trip count loops if there was no or a single
iteration remaining.
This causes loops to be vectorized with a VF where no scalar tail
remains, even if it is required for legality (loop with multiple
countable exits require scalar epilogue to pick the exit).
For now, limit to cases where there's a scalar iteration remaining.
PR: https://github.com/llvm/llvm-project/pull/225633
[VPlan] Take wide induction wrap flags from the increment of the phi. (#226726)
The binary operator of an integer InductionDescriptor is the incoming
value from the latch, which is not required to have the phi as operand.
E.g. for
%x = add i32 %iv, 5
%iv.next = add nuw nsw i32 %x, 1
the flags only apply to %x + 1, while the induction step is 6, and %iv +
6 may wrap even though %iv.next does not. Determine the wrap flags from
the increment of the header phi instead, and only if it adds to or
subtracts from the phi directly.
[LLVM][Docs] Define IR in the lexicon (#221388)
Define IR in the LLVM lexicon using terminology from the LLVM Language
Reference Manual, including its SSA-based structure and three equivalent
representations.
Fixes #139867
AI Usage: ChatGPT
print/py-pyipp: new port
This package allows you to monitor printers that support the Internet
Printing Protocol (IPP) programmatically.
Co-authored-by: Michael Osipov <michaelo at FreeBSD.org>
PR: 298868
FastISel: Assert the emitted instruction defines the result
The fallback path copied the result out of implicit_defs()[0], assuming
the first implicit physical register def is the result. That is an X86
assumption about MUL/IMUL, and it is unreachable for all but
fastEmitInst_r: FastISelEmitter skips any instruction whose first
operand is not an output register, so every opcode reaching these
helpers from generated code has an explicit def.
Co-Authored-By: Claude Opus 5 <noreply at anthropic.com>
