be: Factorise code to initialise emitters.

All backends emit nothing for Phis and be_Keeps, so set this centrally.

ir/be/TEMPLATE/TEMPLATE_emitter.c

@@ -207,8 +207,7 @@ static void emit_Return(const ir_node *node)
  */
 static void TEMPLATE_register_emitters(void)
 {
-	/* first clear the generic function pointer for all ops */
-	ir_clear_opcodes_generic_func();
+	be_init_emitters();
 
 	/* register all emitter functions defined in spec */
 	TEMPLATE_register_spec_emitters();
@@ -218,10 +217,6 @@ static void TEMPLATE_register_emitters(void)
 	be_set_emitter(op_be_IncSP,     emit_be_IncSP);
 	be_set_emitter(op_Return,       emit_Return);
 	be_set_emitter(op_Start,        emit_Start);
-
-	/* no need to emit anything for the following nodes */
-	be_set_emitter(op_Phi,     be_emit_nothing);
-	be_set_emitter(op_be_Keep, be_emit_nothing);
 }
 
 /**

ir/be/amd64/amd64_emitter.c

@@ -737,8 +737,7 @@ static void emit_amd64_Return(const ir_node *node)
  */
 static void amd64_register_emitters(void)
 {
-	/* first clear the generic function pointer for all ops */
-	ir_clear_opcodes_generic_func();
+	be_init_emitters();
 
 	/* register all emitter functions defined in spec */
 	amd64_register_spec_emitters();
@@ -752,9 +751,7 @@ static void amd64_register_emitters(void)
 	be_set_emitter(op_be_Copy,         emit_be_Copy);
 	be_set_emitter(op_be_CopyKeep,     emit_be_Copy);
 	be_set_emitter(op_be_IncSP,        emit_be_IncSP);
-	be_set_emitter(op_be_Keep,         be_emit_nothing);
 	be_set_emitter(op_be_Perm,         emit_be_Perm);
-	be_set_emitter(op_Phi,             be_emit_nothing);
 }
 
 /**

ir/be/arm/arm_emitter.c

@@ -678,8 +678,7 @@ static void emit_arm_Jmp(const ir_node *node)
  */
 static void arm_register_emitters(void)
 {
-	/* first clear the generic function pointer for all ops */
-	ir_clear_opcodes_generic_func();
+	be_init_emitters();
 
 	/* register all emitter functions defined in spec */
 	arm_register_spec_emitters();
@@ -696,10 +695,8 @@ static void arm_register_emitters(void)
 	be_set_emitter(op_be_Copy,       emit_be_Copy);
 	be_set_emitter(op_be_CopyKeep,   emit_be_Copy);
 	be_set_emitter(op_be_IncSP,      emit_be_IncSP);
-	be_set_emitter(op_be_Keep,       be_emit_nothing);
 	be_set_emitter(op_be_MemPerm,    emit_be_MemPerm);
 	be_set_emitter(op_be_Perm,       emit_be_Perm);
-	be_set_emitter(op_Phi,           be_emit_nothing);
 }
 
 /**

ir/be/beemitter.c

@@ -11,6 +11,7 @@
  */
 #include "bedwarf.h"
 #include "beemitter.h"
+#include "benode.h"
 #include "be_t.h"
 #include "panic.h"
 #include "irnode_t.h"
@@ -81,6 +82,13 @@ void be_emit_finish_line_gas(const ir_node *node)
 	be_emit_write_line();
 }
 
+void be_init_emitters(void)
+{
+	ir_clear_opcodes_generic_func();
+	be_set_emitter(op_Phi,     be_emit_nothing);
+	be_set_emitter(op_be_Keep, be_emit_nothing);
+}
+
 void be_emit_nothing(ir_node const *const node)
 {
 	(void)node;

ir/be/beemitter.h

@@ -117,6 +117,8 @@ static inline void be_set_emitter(ir_op *const op, emit_func *const func)
 	set_generic_function_ptr(op, func);
 }
 
+void be_init_emitters(void);
+
 void be_emit_nothing(ir_node const *node);
 
 /**

ir/be/ia32/ia32_emitter.c

@@ -1356,8 +1356,7 @@ static void emit_ia32_Return(const ir_node *node)
  */
 static void ia32_register_emitters(void)
 {
-	/* first clear the generic function pointer for all ops */
-	ir_clear_opcodes_generic_func();
+	be_init_emitters();
 
 	/* register all emitter functions defined in spec */
 	ia32_register_spec_emitters();
@@ -1365,7 +1364,6 @@ static void ia32_register_emitters(void)
 	be_set_emitter(op_be_Copy,         emit_be_Copy);
 	be_set_emitter(op_be_CopyKeep,     emit_be_CopyKeep);
 	be_set_emitter(op_be_IncSP,        emit_be_IncSP);
-	be_set_emitter(op_be_Keep,         be_emit_nothing);
 	be_set_emitter(op_be_Perm,         emit_be_Perm);
 	be_set_emitter(op_ia32_Return,     emit_ia32_Return);
 	be_set_emitter(op_ia32_Start,      be_emit_nothing);
@@ -1384,7 +1382,6 @@ static void ia32_register_emitters(void)
 	be_set_emitter(op_ia32_Minus64,    emit_ia32_Minus64);
 	be_set_emitter(op_ia32_Setcc,      emit_ia32_Setcc);
 	be_set_emitter(op_ia32_SwitchJmp,  emit_ia32_SwitchJmp);
-	be_set_emitter(op_Phi,             be_emit_nothing);
 }
 
 /**
@@ -3330,11 +3327,9 @@ static void ia32_register_binary_emitters(void)
 	be_set_emitter(op_ia32_fxch,          bemit_fxch);
 
 	/* ignore the following nodes */
-	be_set_emitter(op_be_Keep,         be_emit_nothing);
 	be_set_emitter(op_ia32_ProduceVal, be_emit_nothing);
 	be_set_emitter(op_ia32_Start,      be_emit_nothing);
 	be_set_emitter(op_ia32_Unknown,    be_emit_nothing);
-	be_set_emitter(op_Phi,             be_emit_nothing);
 }
 
 static void gen_binary_block(ir_node *block)

ir/be/sparc/sparc_emitter.c

@@ -1354,8 +1354,8 @@ static void emit_be_Copy(const ir_node *node)
  */
 static void sparc_register_emitters(void)
 {
-	/* first clear the generic function pointer for all ops */
-	ir_clear_opcodes_generic_func();
+	be_init_emitters();
+
 	/* register all emitter functions defined in spec */
 	sparc_register_spec_emitters();
 
@@ -1380,8 +1380,6 @@ static void sparc_register_emitters(void)
 	be_set_emitter(op_sparc_fbfcc,     emit_sparc_fbfcc);
 
 	/* no need to emit anything for the following nodes */
-	be_set_emitter(op_Phi,         be_emit_nothing);
-	be_set_emitter(op_be_Keep,     be_emit_nothing);
 	be_set_emitter(op_sparc_Start, be_emit_nothing);
 }