add zextOrTrunc and sextOrTrunc methods, that are similar to the ones in APInt
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86549 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/ConstantRange.cpp b/lib/Support/ConstantRange.cpp
index 423e90d..a194ac4 100644
--- a/lib/Support/ConstantRange.cpp
+++ b/lib/Support/ConstantRange.cpp
@@ -492,6 +492,30 @@
return ConstantRange(L, U);
}
+/// zextOrTrunc - make this range have the bit width given by \p DstTySize. The
+/// value is zero extended, truncated, or left alone to make it that width.
+ConstantRange ConstantRange::zextOrTrunc(uint32_t DstTySize) const {
+ unsigned SrcTySize = getBitWidth();
+ if (SrcTySize > DstTySize)
+ return truncate(DstTySize);
+ else if (SrcTySize < DstTySize)
+ return zeroExtend(DstTySize);
+ else
+ return *this;
+}
+
+/// sextOrTrunc - make this range have the bit width given by \p DstTySize. The
+/// value is sign extended, truncated, or left alone to make it that width.
+ConstantRange ConstantRange::sextOrTrunc(uint32_t DstTySize) const {
+ unsigned SrcTySize = getBitWidth();
+ if (SrcTySize > DstTySize)
+ return truncate(DstTySize);
+ else if (SrcTySize < DstTySize)
+ return signExtend(DstTySize);
+ else
+ return *this;
+}
+
ConstantRange
ConstantRange::add(const ConstantRange &Other) const {
if (isEmptySet() || Other.isEmptySet())