minor tweaks

src/vscript.rs

@@ -188,9 +188,6 @@ fn xmm(r: Register) -> Option<u8> {
         .filter(|i| *i < 16)
 }
 
-/// Registers a call clobbers, so a value cannot survive across one and be attributed to the wrong record.
-const CLOBBER: [usize; 9] = [0, 1, 2, 6, 7, 8, 9, 10, 11];
-
 /// A field of a particular record: which record, and the displacement within it.
 type Slot = (u32, i64);
 
@@ -278,7 +275,10 @@ pub fn vscript_functions(img: &CodeImage) -> Vec<VScriptFunc> {
             dec.decode_out(&mut insn);
 
             if insn.flow_control() == FlowControl::Call {
-                for c in CLOBBER {
+                // Registers a call clobbers, so a value cannot survive one and be attributed to the wrong
+                // record. Taken from `abi`, not transcribed as raw GPR indices — a second copy of a fixed
+                // SysV fact is a copy that can drift.
+                for c in crate::abi::caller_saved_slots() {
                     val[c] = V::Unknown;
                     scaled[c] = false;
                     recid[c] = None;