Compile the vpkuhum/vpkuwum intrinsics into vpkuhum/vpkuwum instead of into
vperm with a perm mask lvx'd from the constant pool.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27448 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 8cf7052..db9e390 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -267,6 +267,56 @@
return false;
}
+/// isConstantOrUndef - Op is either an undef node or a ConstantSDNode. Return
+/// true if Op is undef or if it matches the specified value.
+static bool isConstantOrUndef(SDOperand Op, unsigned Val) {
+ return Op.getOpcode() == ISD::UNDEF ||
+ cast<ConstantSDNode>(Op)->getValue() == Val;
+}
+
+/// isVPKUHUMShuffleMask - Return true if this is the shuffle mask for a
+/// VPKUHUM instruction.
+bool PPC::isVPKUHUMShuffleMask(SDNode *N) {
+ return isConstantOrUndef(N->getOperand( 0), 1) &&
+ isConstantOrUndef(N->getOperand( 1), 3) &&
+ isConstantOrUndef(N->getOperand( 2), 5) &&
+ isConstantOrUndef(N->getOperand( 3), 7) &&
+ isConstantOrUndef(N->getOperand( 4), 9) &&
+ isConstantOrUndef(N->getOperand( 5), 11) &&
+ isConstantOrUndef(N->getOperand( 6), 13) &&
+ isConstantOrUndef(N->getOperand( 7), 15) &&
+ isConstantOrUndef(N->getOperand( 8), 17) &&
+ isConstantOrUndef(N->getOperand( 9), 19) &&
+ isConstantOrUndef(N->getOperand(10), 21) &&
+ isConstantOrUndef(N->getOperand(11), 23) &&
+ isConstantOrUndef(N->getOperand(12), 25) &&
+ isConstantOrUndef(N->getOperand(13), 27) &&
+ isConstantOrUndef(N->getOperand(14), 29) &&
+ isConstantOrUndef(N->getOperand(15), 31);
+}
+
+/// isVPKUWUMShuffleMask - Return true if this is the shuffle mask for a
+/// VPKUWUM instruction.
+bool PPC::isVPKUWUMShuffleMask(SDNode *N) {
+ return isConstantOrUndef(N->getOperand( 0), 2) &&
+ isConstantOrUndef(N->getOperand( 1), 3) &&
+ isConstantOrUndef(N->getOperand( 2), 6) &&
+ isConstantOrUndef(N->getOperand( 3), 7) &&
+ isConstantOrUndef(N->getOperand( 4), 10) &&
+ isConstantOrUndef(N->getOperand( 5), 11) &&
+ isConstantOrUndef(N->getOperand( 6), 14) &&
+ isConstantOrUndef(N->getOperand( 7), 15) &&
+ isConstantOrUndef(N->getOperand( 8), 18) &&
+ isConstantOrUndef(N->getOperand( 9), 19) &&
+ isConstantOrUndef(N->getOperand(10), 22) &&
+ isConstantOrUndef(N->getOperand(11), 23) &&
+ isConstantOrUndef(N->getOperand(12), 26) &&
+ isConstantOrUndef(N->getOperand(13), 27) &&
+ isConstantOrUndef(N->getOperand(14), 30) &&
+ isConstantOrUndef(N->getOperand(15), 31);
+}
+
+
/// isSplatShuffleMask - Return true if the specified VECTOR_SHUFFLE operand
/// specifies a splat of a single element that is suitable for input to
@@ -759,6 +809,10 @@
PPC::isSplatShuffleMask(PermMask.Val, 4)))
return Op;
+ if (PPC::isVPKUWUMShuffleMask(PermMask.Val) ||
+ PPC::isVPKUHUMShuffleMask(PermMask.Val))
+ return Op;
+
// TODO: Handle more cases, and also handle cases that are cheaper to do as
// multiple such instructions than as a constant pool load/vperm pair.