compiler: disallow `callconv` etc from depending on function parameters

Resolves: #22261

1 files changed, 9 insertions, 38 deletions

diff --git a/src/InternPool.zig b/src/InternPool.zig
index 1d8fe45ade..a2c98d73c4 100644
--- a/src/InternPool.zig
+++ b/src/InternPool.zig
@@ -1961,9 +1961,6 @@ pub const Key = union(enum) {
         is_var_args: bool,
         is_generic: bool,
         is_noinline: bool,
-        cc_is_generic: bool,
-        section_is_generic: bool,
-        addrspace_is_generic: bool,
 
         pub fn paramIsComptime(self: @This(), i: u5) bool {
             assert(i < self.param_types.len);
@@ -5456,10 +5453,7 @@ pub const Tag = enum(u8) {
             has_comptime_bits: bool,
             has_noalias_bits: bool,
             is_noinline: bool,
-            cc_is_generic: bool,
-            section_is_generic: bool,
-            addrspace_is_generic: bool,
-            _: u6 = 0,
+            _: u9 = 0,
         };
     };
 
@@ -6885,9 +6879,6 @@ fn extraFuncType(tid: Zcu.PerThread.Id, extra: Local.Extra, extra_index: u32) Ke
         .cc = type_function.data.flags.cc.unpack(),
         .is_var_args = type_function.data.flags.is_var_args,
         .is_noinline = type_function.data.flags.is_noinline,
-        .cc_is_generic = type_function.data.flags.cc_is_generic,
-        .section_is_generic = type_function.data.flags.section_is_generic,
-        .addrspace_is_generic = type_function.data.flags.addrspace_is_generic,
         .is_generic = type_function.data.flags.is_generic,
     };
 }
@@ -8529,9 +8520,6 @@ pub fn getFuncType(
             .has_noalias_bits = key.noalias_bits != 0,
             .is_generic = key.is_generic,
             .is_noinline = key.is_noinline,
-            .cc_is_generic = key.cc == null,
-            .section_is_generic = key.section_is_generic,
-            .addrspace_is_generic = key.addrspace_is_generic,
         },
     });
 
@@ -8703,10 +8691,6 @@ pub const GetFuncDeclIesKey = struct {
     bare_return_type: Index,
     /// null means generic.
     cc: ?std.builtin.CallingConvention,
-    /// null means generic.
-    alignment: ?Alignment,
-    section_is_generic: bool,
-    addrspace_is_generic: bool,
     is_var_args: bool,
     is_generic: bool,
     is_noinline: bool,
@@ -8792,9 +8776,6 @@ pub fn getFuncDeclIes(
             .has_noalias_bits = key.noalias_bits != 0,
             .is_generic = key.is_generic,
             .is_noinline = key.is_noinline,
-            .cc_is_generic = key.cc == null,
-            .section_is_generic = key.section_is_generic,
-            .addrspace_is_generic = key.addrspace_is_generic,
         },
     });
     if (key.comptime_bits != 0) extra.appendAssumeCapacity(.{key.comptime_bits});
@@ -8926,9 +8907,6 @@ pub const GetFuncInstanceKey = struct {
     comptime_args: []const Index,
     noalias_bits: u32,
     bare_return_type: Index,
-    cc: std.builtin.CallingConvention,
-    alignment: Alignment,
-    section: OptionalNullTerminatedString,
     is_noinline: bool,
     generic_owner: Index,
     inferred_error_set: bool,
@@ -8943,11 +8921,14 @@ pub fn getFuncInstance(
     if (arg.inferred_error_set)
         return getFuncInstanceIes(ip, gpa, tid, arg);
 
+    const generic_owner = unwrapCoercedFunc(ip, arg.generic_owner);
+    const generic_owner_ty = ip.indexToKey(ip.funcDeclInfo(generic_owner).ty).func_type;
+
     const func_ty = try ip.getFuncType(gpa, tid, .{
         .param_types = arg.param_types,
         .return_type = arg.bare_return_type,
         .noalias_bits = arg.noalias_bits,
-        .cc = arg.cc,
+        .cc = generic_owner_ty.cc,
         .is_noinline = arg.is_noinline,
     });
 
@@ -8957,8 +8938,6 @@ pub fn getFuncInstance(
     try extra.ensureUnusedCapacity(@typeInfo(Tag.FuncInstance).@"struct".fields.len +
         arg.comptime_args.len);
 
-    const generic_owner = unwrapCoercedFunc(ip, arg.generic_owner);
-
     assert(arg.comptime_args.len == ip.funcTypeParamsLen(ip.typeOf(generic_owner)));
 
     const prev_extra_len = extra.mutate.len;
@@ -9005,8 +8984,6 @@ pub fn getFuncInstance(
         generic_owner,
         func_index,
         func_extra_index,
-        arg.alignment,
-        arg.section,
     );
     return gop.put();
 }
@@ -9031,6 +9008,7 @@ pub fn getFuncInstanceIes(
     try items.ensureUnusedCapacity(4);
 
     const generic_owner = unwrapCoercedFunc(ip, arg.generic_owner);
+    const generic_owner_ty = ip.indexToKey(ip.funcDeclInfo(arg.generic_owner).ty).func_type;
 
     // The strategy here is to add the function decl unconditionally, then to
     // ask if it already exists, and if so, revert the lengths of the mutated
@@ -9086,15 +9064,12 @@ pub fn getFuncInstanceIes(
         .params_len = params_len,
         .return_type = error_union_type,
         .flags = .{
-            .cc = .pack(arg.cc),
+            .cc = .pack(generic_owner_ty.cc),
             .is_var_args = false,
             .has_comptime_bits = false,
             .has_noalias_bits = arg.noalias_bits != 0,
             .is_generic = false,
             .is_noinline = arg.is_noinline,
-            .cc_is_generic = false,
-            .section_is_generic = false,
-            .addrspace_is_generic = false,
         },
     });
     // no comptime_bits because has_comptime_bits is false
@@ -9158,8 +9133,6 @@ pub fn getFuncInstanceIes(
         generic_owner,
         func_index,
         func_extra_index,
-        arg.alignment,
-        arg.section,
     );
 
     func_gop.putFinal(func_index);
@@ -9177,8 +9150,6 @@ fn finishFuncInstance(
     generic_owner: Index,
     func_index: Index,
     func_extra_index: u32,
-    alignment: Alignment,
-    section: OptionalNullTerminatedString,
 ) Allocator.Error!void {
     const fn_owner_nav = ip.getNav(ip.funcDeclInfo(generic_owner).owner_nav);
     const fn_namespace = ip.getCau(fn_owner_nav.analysis_owner.unwrap().?).namespace;
@@ -9191,8 +9162,8 @@ fn finishFuncInstance(
         .name = nav_name,
         .fqn = try ip.namespacePtr(fn_namespace).internFullyQualifiedName(ip, gpa, tid, nav_name),
         .val = func_index,
-        .alignment = alignment,
-        .@"linksection" = section,
+        .alignment = fn_owner_nav.status.resolved.alignment,
+        .@"linksection" = fn_owner_nav.status.resolved.@"linksection",
         .@"addrspace" = fn_owner_nav.status.resolved.@"addrspace",
     });