Changes in directory llvm/lib/Target/PowerPC:
PPCISelLowering.cpp updated: 1.102 -> 1.103
---
Log message:
Implement PPC::isSplatShuffleMask and PPC::getVSPLTImmediate.
---
Diffs of the changes: (+13 -2)
PPCISelLowering.cpp | 15 +++++++++++++--
1 files changed, 13 insertions(+), 2 deletions(-)
Index: llvm/lib/Target/PowerPC/PPCISelLowering.cpp
diff -u llvm/lib/Target/PowerPC/PPCISelLowering.cpp:1.102
llvm/lib/Target/PowerPC/PPCISelLowering.cpp:1.103
--- llvm/lib/Target/PowerPC/PPCISelLowering.cpp:1.102 Mon Mar 20 00:33:01 2006
+++ llvm/lib/Target/PowerPC/PPCISelLowering.cpp Mon Mar 20 00:37:44 2006
@@ -245,14 +245,25 @@
/// VSPLTB/VSPLTH/VSPLTW.
bool PPC::isSplatShuffleMask(SDNode *N) {
assert(N->getOpcode() == ISD::BUILD_VECTOR);
- return false;
+ // This is a splat operation if each element of the permute is the same, and
+ // if the value doesn't reference the second vector.
+ SDOperand Elt = N->getOperand(0);
+ assert(isa<ConstantSDNode>(Elt) && "Invalid VECTOR_SHUFFLE mask!");
+ for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i) {
+ assert(isa<ConstantSDNode>(N->getOperand(i)) &&
+ "Invalid VECTOR_SHUFFLE mask!");
+ if (N->getOperand(i) != Elt) return false;
+ }
+
+ // Make sure it is a splat of the first vector operand.
+ return cast<ConstantSDNode>(Elt)->getValue() < N->getNumOperands();
}
/// getVSPLTImmediate - Return the appropriate VSPLT* immediate to splat the
/// specified isSplatShuffleMask VECTOR_SHUFFLE mask.
unsigned PPC::getVSPLTImmediate(SDNode *N) {
assert(isSplatShuffleMask(N));
- return 0;
+ return cast<ConstantSDNode>(N)->getValue();
}
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