better handle quota of setEvalBranchQuota

Now that c58b80203443dcbf8b737ebdaa1f17fb20c77711 has removed
the "top of the comptime stack" requirement, the branch quota
can be modified somewhere other than the top of the comptime stack.

This means that the quota of a parent IrExecutable has to be
modifiable by an instruction in the child.

Closes #2261

1 files changed, 5 insertions, 2 deletions

diff --git a/src/analyze.cpp b/src/analyze.cpp
index 394364c68f..730c52c927 100644
--- a/src/analyze.cpp
+++ b/src/analyze.cpp
@@ -969,8 +969,9 @@ static ConstExprValue *analyze_const_value(CodeGen *g, Scope *scope, AstNode *no
         Buf *type_name)
 {
     size_t backward_branch_count = 0;
+    size_t backward_branch_quota = default_backward_branch_quota;
     return ir_eval_const_value(g, scope, node, type_entry,
-            &backward_branch_count, default_backward_branch_quota,
+            &backward_branch_count, &backward_branch_quota,
             nullptr, nullptr, node, type_name, nullptr, nullptr);
 }
 
@@ -2623,9 +2624,11 @@ static void get_fully_qualified_decl_name(Buf *buf, Tld *tld) {
 ZigFn *create_fn_raw(CodeGen *g, FnInline inline_value) {
     ZigFn *fn_entry = allocate<ZigFn>(1);
 
+    fn_entry->prealloc_backward_branch_quota = default_backward_branch_quota;
+
     fn_entry->codegen = g;
     fn_entry->analyzed_executable.backward_branch_count = &fn_entry->prealloc_bbc;
-    fn_entry->analyzed_executable.backward_branch_quota = default_backward_branch_quota;
+    fn_entry->analyzed_executable.backward_branch_quota = &fn_entry->prealloc_backward_branch_quota;
     fn_entry->analyzed_executable.fn_entry = fn_entry;
     fn_entry->ir_executable.fn_entry = fn_entry;
     fn_entry->fn_inline = inline_value;