Revert "[ARM][MVE] Add intrinsics for immediate shifts."

and two follow-on commits: one warning fix and one functionality.

As it's breaking at least the lto bot:

http://lab.llvm.org:8011/builders/clang-with-lto-ubuntu/builds/15132/steps/test-stage1-compiler/logs/stdio

This reverts commits:

 8d70f3c933a5b81a87a5ab1af0e3e98ee2cd7c67
 ff4dceef9201c5ae3924e92f6955977f243ac71d
 d97b3e3e65cd77a81b39732af84a1a4229e95091

1 files changed, 0 insertions, 29 deletions

diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 890019ac51c..7447a584159 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -6802,14 +6802,6 @@ Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID,
   }
 }
 
-template<typename Integer>
-static Integer GetIntegerConstantValue(const Expr *E, ASTContext &Context) {
-  llvm::APSInt IntVal;
-  assert(E->isIntegerConstantExpr(IntVal, Context) &&
-         "Sema should have checked this was a constant");
-  return IntVal.getExtValue();
-}
-
 static llvm::Value *SignOrZeroExtend(CGBuilderTy &Builder, llvm::Value *V,
                                      llvm::Type *T, bool Unsigned) {
   // Helper function called by Tablegen-constructed ARM MVE builtin codegen,
@@ -6817,27 +6809,6 @@ static llvm::Value *SignOrZeroExtend(CGBuilderTy &Builder, llvm::Value *V,
   return Unsigned ? Builder.CreateZExt(V, T) : Builder.CreateSExt(V, T);
 }
 
-static llvm::Value *MVEImmediateShr(CGBuilderTy &Builder, llvm::Value *V,
-                                    uint32_t Shift, bool Unsigned) {
-  // MVE helper function for integer shift right. This must handle signed vs
-  // unsigned, and also deal specially with the case where the shift count is
-  // equal to the lane size. In LLVM IR, an LShr with that parameter would be
-  // undefined behavior, but in MVE it's legal, so we must convert it to code
-  // that is not undefined in IR.
-  unsigned LaneBits =
-      V->getType()->getVectorElementType()->getPrimitiveSizeInBits();
-  if (Shift == LaneBits) {
-    // An unsigned shift of the full lane size always generates zero, so we can
-    // simply emit a zero vector. A signed shift of the full lane size does the
-    // same thing as shifting by one bit fewer.
-    if (Unsigned)
-      return llvm::Constant::getNullValue(V->getType());
-    else
-      --Shift;
-  }
-  return Unsigned ? Builder.CreateLShr(V, Shift) : Builder.CreateAShr(V, Shift);
-}
-
 static llvm::Value *ARMMVEVectorSplat(CGBuilderTy &Builder, llvm::Value *V) {
   // MVE-specific helper function for a vector splat, which infers the element
   // count of the output vector by knowing that MVE vectors are all 128 bits