amd64: Simplify amd64_register_saved_by().

diff --git a/ir/be/amd64/bearch_amd64.c b/ir/be/amd64/bearch_amd64.c
index 3e9332e..c43e6e4 100644 (file)
--- a/ir/be/amd64/bearch_amd64.c
+++ b/ir/be/amd64/bearch_amd64.c
@@ -445,41 +445,29 @@ static int amd64_is_valid_clobber(const char *clobber)
 
 static int amd64_register_saved_by(const arch_register_t *reg, int callee)
 {
-       if (callee) {
-               /* check for callee saved */
-               if (reg->reg_class == &amd64_reg_classes[CLASS_amd64_gp]) {
-                       switch (reg->index) {
-                       case REG_GP_RBX:
-                       case REG_GP_RBP:
-                       case REG_GP_R12:
-                       case REG_GP_R13:
-                       case REG_GP_R14:
-                       case REG_GP_R15:
-                               return 1;
-                       default:
-                               return 0;
-                       }
-               }
-       } else {
-               /* check for caller saved */
-               if (reg->reg_class == &amd64_reg_classes[CLASS_amd64_gp]) {
-                       switch (reg->index) {
-                       case REG_GP_RAX:
-                       case REG_GP_RCX:
-                       case REG_GP_RDX:
-                       case REG_GP_RSI:
-                       case REG_GP_RDI:
-                       case REG_GP_R8:
-                       case REG_GP_R9:
-                       case REG_GP_R10:
-                       case REG_GP_R11:
-                               return 1;
-                       default:
-                               return 0;
-                       }
-               }
+       switch (reg->global_index) {
+       case REG_RBX:
+       case REG_RBP:
+       case REG_R12:
+       case REG_R13:
+       case REG_R14:
+       case REG_R15:
+               return callee;
+
+       case REG_RAX:
+       case REG_RCX:
+       case REG_RDX:
+       case REG_RSI:
+       case REG_RDI:
+       case REG_R8:
+       case REG_R9:
+       case REG_R10:
+       case REG_R11:
+               return !callee;
+
+       default:
+               return 0;
        }
-       return 0;
 }
 
 const arch_isa_if_t amd64_isa_if = {