stage2: Fix panic on initializing comptime fields in tuple

This resolves https://github.com/ziglang/zig/issues/11159

The problem was that:
  1. We were not correctly deleting the field stores after recognizing
     that an array initializer was a comptime-known value.
  2. LLVM was not checking that the final type had no runtime bits, and
     so would generate an invalid store.

This also adds several test cases for related bugs, just to check these
in for later work.

3 files changed, 49 insertions, 0 deletions

diff --git a/test/behavior/bugs/11159.zig b/test/behavior/bugs/11159.zig
new file mode 100644
index 0000000000..fdd3807059
--- /dev/null
+++ b/test/behavior/bugs/11159.zig
@@ -0,0 +1,23 @@
+const std = @import("std");
+const builtin = @import("builtin");
+
+test {
+    const T = @TypeOf(.{ @as(i32, 0), @as(u32, 0) });
+    var a: T = .{ 0, 0 };
+    _ = a;
+}
+
+test {
+    if (builtin.zig_backend == .stage1) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
+
+    const S = struct {
+        comptime x: i32 = 0,
+        comptime y: u32 = 0,
+    };
+    var a: S = .{};
+    _ = a;
+    var b = S{};
+    _ = b;
+}
diff --git a/test/behavior/bugs/11162.zig b/test/behavior/bugs/11162.zig
new file mode 100644
index 0000000000..ced435a305
--- /dev/null
+++ b/test/behavior/bugs/11162.zig
@@ -0,0 +1,16 @@
+const std = @import("std");
+const builtin = @import("builtin");
+const expect = std.testing.expect;
+
+test {
+    if (builtin.zig_backend == .stage1) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
+
+    var x: u32 = 15;
+    const T = @TypeOf(.{ @as(i32, -1234), @as(u32, 5678), x });
+    var a: T = .{ -1234, 5678, x + 1 };
+
+    try expect(a[0] == -1234);
+    try expect(a[1] == 5678);
+    try expect(a[2] == 16);
+}
diff --git a/test/behavior/bugs/11182.zig b/test/behavior/bugs/11182.zig
new file mode 100644
index 0000000000..eb4ee8ac9d
--- /dev/null
+++ b/test/behavior/bugs/11182.zig
@@ -0,0 +1,10 @@
+const std = @import("std");
+const builtin = @import("builtin");
+
+test {
+    if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
+
+    const T = @TypeOf(.{ @as(i32, 0), @as(u32, 0) });
+    var a = T{ 0, 0 };
+    _ = a;
+}