cbe: fix pointers to aliases of extern values

1 files changed, 8 insertions, 4 deletions

diff --git a/src/Module.zig b/src/Module.zig
index e1db07ab72..96be13e768 100644
--- a/src/Module.zig
+++ b/src/Module.zig
@@ -888,15 +888,19 @@ pub const Decl = struct {
         assert(decl.dependencies.swapRemove(other));
     }
 
-    pub fn isExtern(decl: Decl, mod: *Module) bool {
+    pub fn getExternDecl(decl: Decl, mod: *Module) OptionalIndex {
         assert(decl.has_tv);
         return switch (mod.intern_pool.indexToKey(decl.val.toIntern())) {
-            .variable => |variable| variable.is_extern,
-            .extern_func => true,
-            else => false,
+            .variable => |variable| if (variable.is_extern) variable.decl.toOptional() else .none,
+            .extern_func => |extern_func| extern_func.decl.toOptional(),
+            else => .none,
         };
     }
 
+    pub fn isExtern(decl: Decl, mod: *Module) bool {
+        return decl.getExternDecl(mod) != .none;
+    }
+
     pub fn getAlignment(decl: Decl, mod: *Module) u32 {
         assert(decl.has_tv);
         return @as(u32, @intCast(decl.alignment.toByteUnitsOptional() orelse decl.ty.abiAlignment(mod)));