cc: overhaul inliner heuristics with GCC/LLVM-style growth model

Replace flat MAX_CALLER_GROWTH with proportional growth limits
(GCC-style), hard caller size cap, and recursive-caller stack
estimate (LLVM-style). Fix Bug AL: symaddr-on-Arg during inlining
produced pointer-to-pointer for MEMORY-class struct params; convert
to copy instead. Update caller_size after each inline for accurate
mid-iteration decisions. Remove bugs.md (info in git history/memory).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jgarzik

bugs.md

@@ -34,6 +34,8 @@ Key source files:
 | `parse/parser.rs` | Recursive descent parser producing AST |
 | `parse/ast.rs` | AST node definitions |
 | `types.rs` | C type system |
+| `strings.rs` | String interning (StringId), pre-interns keywords at startup |
+| `kw.rs` | Pre-interned keyword constants and tag-based classification |
 | `symbol.rs` | Symbol table with scope management |
 | `ir/linearize.rs` | AST → IR conversion, SSA construction |
 | `ir/mod.rs` | Intermediate representation definitions |

cc/README.md

@@ -1019,7 +1019,8 @@ impl RegAlloc {
 
                             // Stack slot reuse uses block-level interference checks
                             // (live_in/live_out from dataflow fixpoint) which are correct
-                            // for all CFG shapes. Addr-taken syms need stable addresses.
+                            // for all CFG shapes. Addr-taken syms need stable addresses
+                            // because symaddr-derived pointers may escape to callees.
                             let reusable = !self.addr_taken_syms.contains(&interval.pseudo);
 
                             self.alloc_stack_slot(&interval, aligned_size, alignment, reusable);

cc/arch/aarch64/regalloc.rs

@@ -1052,7 +1052,8 @@ impl RegAlloc {
 
                             // Stack slot reuse uses block-level interference checks
                             // (live_in/live_out from dataflow fixpoint) which are correct
-                            // for all CFG shapes. Addr-taken syms need stable addresses.
+                            // for all CFG shapes. Addr-taken syms need stable addresses
+                            // because symaddr-derived pointers may escape to callees.
                             let reusable = !self.addr_taken_syms.contains(&interval.pseudo);
 
                             self.alloc_stack_slot(&interval, aligned_size, alignment, reusable);