implement packed struct equality (#21679)

1 files changed, 7 insertions, 0 deletions

diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig
index 623aa995d4..bd59cef569 100644
--- a/src/codegen/llvm.zig
+++ b/src/codegen/llvm.zig
@@ -6032,6 +6032,7 @@ pub const FuncGen = struct {
         const o = self.ng.object;
         const pt = o.pt;
         const zcu = pt.zcu;
+        const ip = &zcu.intern_pool;
         const scalar_ty = operand_ty.scalarType(zcu);
         const int_ty = switch (scalar_ty.zigTypeTag(zcu)) {
             .@"enum" => scalar_ty.intTagType(zcu),
@@ -6110,6 +6111,12 @@ pub const FuncGen = struct {
                 return phi.toValue();
             },
             .float => return self.buildFloatCmp(fast, op, operand_ty, .{ lhs, rhs }),
+            .@"struct" => blk: {
+                const struct_obj = ip.loadStructType(scalar_ty.toIntern());
+                assert(struct_obj.layout == .@"packed");
+                const backing_index = struct_obj.backingIntTypeUnordered(ip);
+                break :blk Type.fromInterned(backing_index);
+            },
             else => unreachable,
         };
         const is_signed = int_ty.isSignedInt(zcu);