From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Mon, 22 Jun 2020 19:03:23 +0000 (+0100)
Subject: [X86] truncateVectorWithPACK - fix outdated comment. NFC.
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4c257bb44e7216961cb46d22d4a53844919c8ed0;p=platform%2Fupstream%2Fllvm.git

[X86] truncateVectorWithPACK - fix outdated comment. NFC.

We perform PACKSS/PACKUS on AVX512 targets if the calling function wants to.
---

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 1c6164c..a6bb415 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -20270,7 +20270,7 @@ static SDValue truncateVectorWithPACK(unsigned Opcode, EVT DstVT, SDValue In,
          "Unexpected PACK opcode");
   assert(DstVT.isVector() && "VT not a vector?");
 
-  // Requires SSE2 but AVX512 has fast vector truncate.
+  // Requires SSE2 for PACKSS (SSE41 PACKUSDW is handled below).
   if (!Subtarget.hasSSE2())
     return SDValue();