Codegen things like:

 <int -1, int -1, int -1, int -1>
and
 <int 65537, int 65537, int 65537, int 65537>

Using things like:
  vspltisb v0, -1
and:
  vspltish v0, 1

instead of using constant pool loads.

This implements CodeGen/PowerPC/vec_splat.ll:splat_imm_i{32|16}.

llvm-svn: 27106

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.h b/llvm/lib/Target/PowerPC/PPCISelLowering.h
index 5482e9aa5c0..eeab53df009 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.h
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.h
@@ -105,6 +105,11 @@ namespace llvm {
     /// isZeroVector - Return true if this build_vector is an all-zero vector.
     ///
     bool isZeroVector(SDNode *N);
+    
+    /// isVecSplatImm - Return true if this is a build_vector of constants which
+    /// can be formed by using a vspltis[bhw] instruction.  The ByteSize field
+    /// indicates the number of bytes of each element [124] -> [bhw].
+    bool isVecSplatImm(SDNode *N, unsigned ByteSize, char *Val = 0);
   }
   
   class PPCTargetLowering : public TargetLowering {