Implement Constant::isAllOnesValue(). Fix ConstantFolding to use the new api.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138469 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ConstantFolding.cpp b/lib/Analysis/ConstantFolding.cpp
index 7a8c703..df79849 100644
--- a/lib/Analysis/ConstantFolding.cpp
+++ b/lib/Analysis/ConstantFolding.cpp
@@ -45,16 +45,12 @@
/// ConstantExpr if unfoldable.
static Constant *FoldBitCast(Constant *C, Type *DestTy,
const TargetData &TD) {
-
- ConstantVector *CV = dyn_cast<ConstantVector>(C);
- IntegerType *IntVTy = dyn_cast<IntegerType>(DestTy);
- // When casting vectors to scalar integers, catch the
- // obvious splat cases.
- if (IntVTy && CV) {
- if (CV->isNullValue()) return ConstantInt::getNullValue(IntVTy);
- if (CV->isAllOnesValue()) return ConstantInt::getAllOnesValue(IntVTy);
- }
-
+ // Catch the obvious splat cases.
+ if (C->isNullValue() && !DestTy->isX86_MMXTy())
+ return Constant::getNullValue(DestTy);
+ if (C->isAllOnesValue() && !DestTy->isX86_MMXTy())
+ return Constant::getAllOnesValue(DestTy);
+
// The code below only handles casts to vectors currently.
VectorType *DestVTy = dyn_cast<VectorType>(DestTy);
if (DestVTy == 0)
@@ -68,6 +64,7 @@
}
// If this is a bitcast from constant vector -> vector, fold it.
+ ConstantVector *CV = dyn_cast<ConstantVector>(C);
if (CV == 0)
return ConstantExpr::getBitCast(C, DestTy);