From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Sun, 17 May 2020 13:39:51 +0000 (+0100)
Subject: [X86] getTargetConstantBitsFromNode - remove unnecessary X86ISD::VBROADCAST handling.
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=9aca5b68ee3fdfa90adb1bba2781b857dd56489b;p=android-x86%2Fexternal-llvm-project.git

[X86] getTargetConstantBitsFromNode - remove unnecessary X86ISD::VBROADCAST handling.

We create X86ISD::VBROADCAST_LOAD for constant pool folds now.
---

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 73f0755de12..26f90cca1e9 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -6445,23 +6445,6 @@ static bool getTargetConstantBitsFromNode(SDValue Op, unsigned EltSizeInBits,
   }
 
   // Extract constant bits from a broadcasted constant pool scalar.
-  if (Op.getOpcode() == X86ISD::VBROADCAST &&
-      EltSizeInBits <= VT.getScalarSizeInBits()) {
-    if (auto *Broadcast = getTargetConstantFromNode(Op.getOperand(0))) {
-      unsigned SrcEltSizeInBits = Broadcast->getType()->getScalarSizeInBits();
-      unsigned NumSrcElts = SizeInBits / SrcEltSizeInBits;
-
-      APInt UndefSrcElts(NumSrcElts, 0);
-      SmallVector<APInt, 64> SrcEltBits(1, APInt(SrcEltSizeInBits, 0));
-      if (CollectConstantBits(Broadcast, SrcEltBits[0], UndefSrcElts, 0)) {
-        if (UndefSrcElts[0])
-          UndefSrcElts.setBits(0, NumSrcElts);
-        SrcEltBits.append(NumSrcElts - 1, SrcEltBits[0]);
-        return CastBitData(UndefSrcElts, SrcEltBits);
-      }
-    }
-  }
-
   if (Op.getOpcode() == X86ISD::VBROADCAST_LOAD &&
       EltSizeInBits <= VT.getScalarSizeInBits()) {
     auto *MemIntr = cast<MemIntrinsicSDNode>(Op);