From cb55803a59d4fe99b527dc3ffc5674666511f729 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Tue, 25 Jun 2019 13:57:45 -0400
Subject: [PATCH] fix implicit cast vector to array

---
 src/ir.cpp                      |  3 +++
 test/stage1/behavior/vector.zig | 13 +++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/src/ir.cpp b/src/ir.cpp
index 2991dd518..98d6cb25d 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -12283,6 +12283,9 @@ static IrInstruction *ir_analyze_vector_to_array(IrAnalyze *ira, IrInstruction *
         result->value.type = array_type;
         return result;
     }
+    if (result_loc == nullptr) {
+        result_loc = no_result_loc();
+    }
     IrInstruction *result_loc_inst = ir_resolve_result(ira, source_instr, result_loc, array_type, nullptr, true, false);
     if (type_is_invalid(result_loc_inst->value.type) || instr_is_unreachable(result_loc_inst)) {
         return result_loc_inst;
diff --git a/test/stage1/behavior/vector.zig b/test/stage1/behavior/vector.zig
index 21bbe3160..70b47c459 100644
--- a/test/stage1/behavior/vector.zig
+++ b/test/stage1/behavior/vector.zig
@@ -61,3 +61,16 @@ test "vector bit operators" {
     S.doTheTest();
     comptime S.doTheTest();
 }
+
+test "implicit cast vector to array" {
+    const S = struct {
+        fn doTheTest() void {
+            var a: @Vector(4, i32) = [_]i32{ 1, 2, 3, 4 };
+            var result_array: [4]i32 = a;
+            result_array = a;
+            expect(mem.eql(i32, result_array, [4]i32{ 1, 2, 3, 4 }));
+        }
+    };
+    S.doTheTest();
+    comptime S.doTheTest();
+}