Remove more odd code that tries to account for an off by 1 problem in vec3 shuffles...

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187561 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp
index c0355f690de11fbc09a6faeadb6c3e1e5ab6da24..9ab111c4935ca24be919a575bf565c08c50e15c7 100644 (file)
--- a/lib/CodeGen/CGExprScalar.cpp
+++ b/lib/CodeGen/CGExprScalar.cpp
@@ -944,14 +944,6 @@ Value *ScalarExprEmitter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
       Value *Indx = Builder.CreateExtractElement(Mask, IIndx, "shuf_idx");
       Indx = Builder.CreateZExt(Indx, CGF.Int32Ty, "idx_zext");
 
-      // Handle vec3 special since the index will be off by one for the RHS.
-      if ((LHSElts == 6) && (E->getNumSubExprs() == 3)) {
-        Value *cmpIndx, *newIndx;
-        cmpIndx = Builder.CreateICmpUGT(Indx, Builder.getInt32(3),
-                                        "cmp_shuf_idx");
-        newIndx = Builder.CreateSub(Indx, Builder.getInt32(1), "shuf_idx_adj");
-        Indx = Builder.CreateSelect(cmpIndx, newIndx, Indx, "sel_shuf_idx");
-      }
       Value *VExt = Builder.CreateExtractElement(LHS, Indx, "shuf_elt");
       NewV = Builder.CreateInsertElement(NewV, VExt, IIndx, "shuf_ins");
     }