From 566177c3d526a013809f1d6fc85cd0b111771670 Mon Sep 17 00:00:00 2001 From: Simon Pilgrim Date: Tue, 26 Feb 2019 11:44:23 +0000 Subject: [PATCH] [LegalizeDAG] Use APInt::getSplat helper to create bitreverse masks. NFCI. llvm-svn: 354867 --- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index 0e5ba34..f4dfccc 100644 --- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -2493,16 +2493,12 @@ SDValue SelectionDAGLegalize::ExpandBITREVERSE(SDValue Op, const SDLoc &dl) { // TODO: We can easily support i4/i2 legal types if any target ever does. if (Sz >= 8 && isPowerOf2_32(Sz)) { // Create the masks - repeating the pattern every byte. - APInt MaskHi4(Sz, 0), MaskHi2(Sz, 0), MaskHi1(Sz, 0); - APInt MaskLo4(Sz, 0), MaskLo2(Sz, 0), MaskLo1(Sz, 0); - for (unsigned J = 0; J != Sz; J += 8) { - MaskHi4 = MaskHi4 | (0xF0ull << J); - MaskLo4 = MaskLo4 | (0x0Full << J); - MaskHi2 = MaskHi2 | (0xCCull << J); - MaskLo2 = MaskLo2 | (0x33ull << J); - MaskHi1 = MaskHi1 | (0xAAull << J); - MaskLo1 = MaskLo1 | (0x55ull << J); - } + APInt MaskHi4 = APInt::getSplat(Sz, APInt(8, 0xF0)); + APInt MaskHi2 = APInt::getSplat(Sz, APInt(8, 0xCC)); + APInt MaskHi1 = APInt::getSplat(Sz, APInt(8, 0xAA)); + APInt MaskLo4 = APInt::getSplat(Sz, APInt(8, 0x0F)); + APInt MaskLo2 = APInt::getSplat(Sz, APInt(8, 0x33)); + APInt MaskLo1 = APInt::getSplat(Sz, APInt(8, 0x55)); // BSWAP if the type is wider than a single byte. Tmp = (Sz > 8 ? DAG.getNode(ISD::BSWAP, dl, VT, Op) : Op); -- 2.7.4