[IR] Implement Constant::isNegativeZeroValue/isZeroValue/isAllOnesValue/isOneValue/isMinSignedValue for ConstantDataVector without going through getElementAsConstant

Summary:
Currently these methods call ConstantDataVector::getSplatValue which uses getElementsAsConstant to create a Constant object representing the element value. This method incurs a map lookup to see if we already have created such a Constant before and if not allocates a new Constant object.

This patch changes these methods to use getElementAsAPFloat and getElementAsInteger so we can just examine the data values directly.

Reviewers: spatel, pcc, dexonsmith, bogner, craig.topper

Reviewed By: craig.topper

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D35040

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308112 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 0 deletions

diff --git a/include/llvm/IR/Constants.h b/include/llvm/IR/Constants.h
index 2e72c41ccee3..0094fd54992a 100644
--- a/include/llvm/IR/Constants.h
+++ b/include/llvm/IR/Constants.h
@@ -598,6 +598,10 @@ public:
   /// specified element in the low bits of a uint64_t.
   uint64_t getElementAsInteger(unsigned i) const;
 
+  /// If this is a sequential container of integers (of any size), return the
+  /// specified element as an APInt.
+  APInt getElementAsAPInt(unsigned i) const;
+
   /// If this is a sequential container of floating point type, return the
   /// specified element as an APFloat.
   APFloat getElementAsAPFloat(unsigned i) const;
@@ -761,6 +765,10 @@ public:
   /// i32/i64/float/double) and must be a ConstantFP or ConstantInt.
   static Constant *getSplat(unsigned NumElts, Constant *Elt);
 
+  /// Returns true if this is a splat constant, meaning that all elements have
+  /// the same value.
+  bool isSplat() const;
+
   /// If this is a splat constant, meaning that all of the elements have the
   /// same value, return that value. Otherwise return NULL.
   Constant *getSplatValue() const;