diff options
| -rw-r--r-- | llgo/irgen/strings.go | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/llgo/irgen/strings.go b/llgo/irgen/strings.go index 4a6554b11d5..f7ed46ba6b2 100644 --- a/llgo/irgen/strings.go +++ b/llgo/irgen/strings.go @@ -24,7 +24,23 @@ func (fr *frame) concatenateStrings(lhs, rhs *govalue) *govalue { return newValue(result[0], types.Typ[types.String]) } +func (fr *frame) compareStringEmpty(v llvm.Value) *govalue { + len := fr.builder.CreateExtractValue(v, 1, "") + result := fr.builder.CreateIsNull(len, "") + result = fr.builder.CreateZExt(result, llvm.Int8Type(), "") + return newValue(result, types.Typ[types.Bool]) +} + func (fr *frame) compareStrings(lhs, rhs *govalue, op token.Token) *govalue { + if op == token.EQL { + if lhs.value.IsNull() { + return fr.compareStringEmpty(rhs.value) + } + if rhs.value.IsNull() { + return fr.compareStringEmpty(lhs.value) + } + } + result := fr.runtime.strcmp.call(fr, lhs.value, rhs.value)[0] zero := llvm.ConstNull(fr.types.inttype) var pred llvm.IntPredicate |
