compiler: handle eval branch quota in memoized calls

In a `memoized_call`, store how many backwards braches the call
performs. Add this to `sema.branch_count` when using a memoized call. If
this exceeds the quota, perform a non-memoized call to get a correct
"exceeded X backwards branches" error.

Also, do not memoize calls which do `@setEvalBranchQuota` or similar, as
this affects global state which must apply to the caller.

Change some eval branch quotas so that the compiler itself still builds correctly.

This commit manually changes a file in Aro which is automatically
generated. The sources which generate the file are not in this repo.
Upstream Aro should make the suitable changes on their end before the
next sync of Aro sources into the Zig repo.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/InternPool.zig b/src/InternPool.zig
index d953755987..83732a29f6 100644
--- a/src/InternPool.zig
+++ b/src/InternPool.zig
@@ -2391,6 +2391,7 @@ pub const Key = union(enum) {
         func: Index,
         arg_values: []const Index,
         result: Index,
+        branch_count: u32,
     };
 
     pub fn hash32(key: Key, ip: *const InternPool) u32 {
@@ -6157,6 +6158,7 @@ pub const MemoizedCall = struct {
     func: Index,
     args_len: u32,
     result: Index,
+    branch_count: u32,
 };
 
 pub fn init(ip: *InternPool, gpa: Allocator, available_threads: usize) !void {
@@ -6785,6 +6787,7 @@ pub fn indexToKey(ip: *const InternPool, index: Index) Key {
                 .func = extra.data.func,
                 .arg_values = @ptrCast(extra_list.view().items(.@"0")[extra.end..][0..extra.data.args_len]),
                 .result = extra.data.result,
+                .branch_count = extra.data.branch_count,
             } };
         },
     };
@@ -7955,6 +7958,7 @@ pub fn get(ip: *InternPool, gpa: Allocator, tid: Zcu.PerThread.Id, key: Key) All
                     .func = memoized_call.func,
                     .args_len = @intCast(memoized_call.arg_values.len),
                     .result = memoized_call.result,
+                    .branch_count = memoized_call.branch_count,
                 }),
             });
             extra.appendSliceAssumeCapacity(.{@ptrCast(memoized_call.arg_values)});