Turn HARD_REGNO_NREGS into a target hook

[thirdparty/gcc.git] / gcc / config / bfin / bfin.c

diff --git a/gcc/config/bfin/bfin.c b/gcc/config/bfin/bfin.c
index 7bf8c4267a2617ac43683b72651d97374337349b..7ef173aface6a0b69f160df3ba5067fbe2d20d32 100644 (file)
--- a/gcc/config/bfin/bfin.c
+++ b/gcc/config/bfin/bfin.c
@@ -2114,6 +2114,18 @@ bfin_expand_call (rtx retval, rtx fnaddr, rtx callarg1, rtx cookie, int sibcall)
     CALL_INSN_FUNCTION_USAGE (call) = use;
 }
 \f
+/* Implement TARGET_HARD_REGNO_NREGS.  */
+
+static unsigned int
+bfin_hard_regno_nregs (unsigned int regno, machine_mode mode)
+{
+  if (mode == PDImode && (regno == REG_A0 || regno == REG_A1))
+    return 1;
+  if (mode == V2PDImode && (regno == REG_A0 || regno == REG_A1))
+    return 2;
+  return CLASS_MAX_NREGS (GENERAL_REGS, mode);
+}
+
 /* Implement TARGET_HARD_REGNO_MODE_OK.
 
    Do not allow to store a value in REG_CC for any mode.
@@ -5862,6 +5874,8 @@ bfin_conditional_register_usage (void)
 #undef TARGET_CAN_USE_DOLOOP_P
 #define TARGET_CAN_USE_DOLOOP_P bfin_can_use_doloop_p
 
+#undef TARGET_HARD_REGNO_NREGS
+#define TARGET_HARD_REGNO_NREGS bfin_hard_regno_nregs
 #undef TARGET_HARD_REGNO_MODE_OK
 #define TARGET_HARD_REGNO_MODE_OK bfin_hard_regno_mode_ok