Support pattern matching vsldoi(x,y) and vsldoi(x,x), which allows the f.e. to

lower it and LLVM to have one fewer intrinsic.  This implements
CodeGen/PowerPC/vec_shuffle.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27450 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/Target/PowerPC/PPCISelLowering.h b/lib/Target/PowerPC/PPCISelLowering.h
index 4b59c2f5eb..77d85c2559 100644
--- a/lib/Target/PowerPC/PPCISelLowering.h
+++ b/lib/Target/PowerPC/PPCISelLowering.h
@@ -110,6 +110,14 @@ namespace llvm {
     /// VPKUWUM instruction.
     bool isVPKUWUMShuffleMask(SDNode *N);
     
+    /// isVSLDOIShuffleMask - If this is a vsldoi shuffle mask, return the shift
+    /// amount, otherwise return -1.
+    int isVSLDOIShuffleMask(SDNode *N);
+
+    /// isVSLDOIRotateShuffleMask - If this is a vsldoi rotate shuffle mask,
+    /// return the shift amount, otherwise return -1.  This matches vsldoi(x,x).
+    int isVSLDOIRotateShuffleMask(SDNode *N);
+    
     /// isSplatShuffleMask - Return true if the specified VECTOR_SHUFFLE operand
     /// specifies a splat of a single element that is suitable for input to
     /// VSPLTB/VSPLTH/VSPLTW.