stage2: pass some error union tests

 * Value: rename `error_union` to `eu_payload` and clarify the intended
   usage in the doc comments. The way error unions is represented with
   Value is fixed to not have ambiguous values.
 * Fix codegen for error union constants in all the backends.
 * Implement the AIR instructions having to do with error unions in the
   LLVM backend.

1 files changed, 0 insertions, 42 deletions

diff --git a/test/behavior/if.zig b/test/behavior/if.zig
index e8c84f4570..191d4817df 100644
--- a/test/behavior/if.zig
+++ b/test/behavior/if.zig
@@ -65,45 +65,3 @@ test "labeled break inside comptime if inside runtime if" {
     }
     try expect(answer == 42);
 }
-
-test "const result loc, runtime if cond, else unreachable" {
-    const Num = enum {
-        One,
-        Two,
-    };
-
-    var t = true;
-    const x = if (t) Num.Two else unreachable;
-    try expect(x == .Two);
-}
-
-test "if prongs cast to expected type instead of peer type resolution" {
-    const S = struct {
-        fn doTheTest(f: bool) !void {
-            var x: i32 = 0;
-            x = if (f) 1 else 2;
-            try expect(x == 2);
-
-            var b = true;
-            const y: i32 = if (b) 1 else 2;
-            try expect(y == 1);
-        }
-    };
-    try S.doTheTest(false);
-    comptime try S.doTheTest(false);
-}
-
-test "while copies its payload" {
-    const S = struct {
-        fn doTheTest() !void {
-            var tmp: ?i32 = 10;
-            if (tmp) |value| {
-                // Modify the original variable
-                tmp = null;
-                try expectEqual(@as(i32, 10), value);
-            } else unreachable;
-        }
-    };
-    try S.doTheTest();
-    comptime try S.doTheTest();
-}