[Flint] adding flag allocation pass for gen9

2026-08-17 18:28:01 +02:00
parent ae994bc345
commit 67314a71ae
3 changed files with 268 additions and 3 deletions
@@ -11,6 +11,7 @@ pub const Error = error{
    InvalidInstruction,
    InvalidVirtualRegister,
    InvalidVirtualFlag,
+    UnallocatedVirtualFlag,
    InvalidPhysicalRegister,
    InvalidRegisterSize,
    InvalidRegisterAlignment,
@@ -300,8 +301,12 @@ fn validateRegisterRef(program: *const program_ir.Program, register: operand.Reg

 fn validateFlag(program: *const program_ir.Program, flag: operand.FlagRef) Error!void {
    switch (flag) {
-        .virtual => |id| if (!program.virtual_flags.isLive(id))
-            return Error.InvalidVirtualFlag,
+        .virtual => |id| {
+            if (program.properties.flags_allocated)
+                return Error.UnallocatedVirtualFlag;
+            if (!program.virtual_flags.isLive(id))
+                return Error.InvalidVirtualFlag;
+        },
        .physical => {},
    }
 }