- { "name" => "r0", "type" => 1 },
- { "name" => "r1", "type" => 1 },
- { "name" => "r2", "type" => 1 },
- { "name" => "r3", "type" => 1 },
- { "name" => "r4", "type" => 2 },
- { "name" => "r5", "type" => 2 },
- { "name" => "r6", "type" => 2 },
- { "name" => "r7", "type" => 2 },
- { "name" => "r8", "type" => 2 },
- { "name" => "r9", "type" => 2 },
- { "name" => "r10", "type" => 2 },
- { "name" => "r11", "type" => 2 },
- { "name" => "r12", "type" => 4 | 2 }, # reserved for linker
- { "name" => "sp", "type" => 4 | 2 }, # this is our stack pointer
- { "name" => "lr", "type" => 2 | 1 }, # this is our return address
- { "name" => "pc", "type" => 4 | 2 }, # this is our program counter
- { name => "gp_UKNWN", type => 4 | 8 | 16 }, # we need a dummy register for Unknown nodes
+ { "name" => "r0", "type" => $caller_save },
+ { "name" => "r1", "type" => $caller_save },
+ { "name" => "r2", "type" => $caller_save },
+ { "name" => "r3", "type" => $caller_save },
+ { "name" => "r4", "type" => $callee_save },
+ { "name" => "r5", "type" => $callee_save },
+ { "name" => "r6", "type" => $callee_save },
+ { "name" => "r7", "type" => $callee_save },
+ { "name" => "r8", "type" => $callee_save },
+ { "name" => "r9", "type" => $callee_save },
+ { "name" => "r10", "type" => $callee_save },
+ { "name" => "r11", "type" => $callee_save },
+ { "name" => "r12", "type" => $ignore | $callee_save }, # reserved for linker
+ { "name" => "sp", "type" => $ignore | $callee_save }, # this is our stack pointer
+ { "name" => "lr", "type" => $callee_save | $caller_save }, # this is our return address
+ { "name" => "pc", "type" => $ignore | $callee_save }, # this is our program counter
+ { name => "gp_UKNWN", type => $ignore | $arbitrary | $virtual }, # we need a dummy register for Unknown nodes