diff options
Diffstat (limited to 'llvm/lib/Support')
| -rw-r--r-- | llvm/lib/Support/ConstantRange.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Support/ConstantRange.cpp b/llvm/lib/Support/ConstantRange.cpp index b83dcccca67..221ca948ca5 100644 --- a/llvm/lib/Support/ConstantRange.cpp +++ b/llvm/lib/Support/ConstantRange.cpp @@ -537,6 +537,12 @@ ConstantRange::multiply(const ConstantRange &Other) const { if (isEmptySet() || Other.isEmptySet()) return ConstantRange(getBitWidth(), /*isFullSet=*/false); + + // If any of the operands is zero, then the result is also zero. + if ((getSingleElement() && *getSingleElement() == 0) || + (Other.getSingleElement() && *Other.getSingleElement() == 0)) + return ConstantRange(APInt(getBitWidth(), 0)); + if (isFullSet() || Other.isFullSet()) return ConstantRange(getBitWidth(), /*isFullSet=*/true); |
