compiler: use llvm array length

Author: dgryski

compiler/map.go

@@ -301,9 +301,9 @@ func (b *builder) zeroUndefBytes(typ types.Type, ptr llvm.Value) error {
 		// - padding within each element
 		// - padding between elements
 
-		for i := uint64(0); i < uint64(typ.Len()); i++ {
+		for i := 0; i < llvmArrayType.ArrayLength(); i++ {
 			// for each element, first clear any undef bytes in the element itself
-			offset := b.targetData.ElementOffset(llvmArrayType, int(i))
+			offset := b.targetData.ElementOffset(llvmArrayType, i)
 			llvmOffset := llvm.ConstInt(b.uintptrType, offset, false)
 			ptr := b.CreateGEP(b.ctx.Int8Type(), base, []llvm.Value{llvmOffset}, "")