Constant folding support for calls to umul.with.overflow(), basically identical to the smul.with.overflow() code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128379 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index f4aae72..5789721 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -2078,6 +2078,16 @@
return Res;
}
+APInt APInt::umul_ov(const APInt &RHS, bool &Overflow) const {
+ APInt Res = *this * RHS;
+
+ if (*this != 0 && RHS != 0)
+ Overflow = Res.udiv(RHS) != *this || Res.udiv(*this) != RHS;
+ else
+ Overflow = false;
+ return Res;
+}
+
APInt APInt::sshl_ov(unsigned ShAmt, bool &Overflow) const {
Overflow = ShAmt >= getBitWidth();
if (Overflow)