Encourage the compiler to tail-call rather than inline
across the dozens of opcode expanders.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/tcg-op.c | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index 828eb9ee46..9aed19e957 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -31,20 +31,26 @@
 #include "tcg-internal.h"
 
 
-void tcg_gen_op1(TCGOpcode opc, TCGArg a1)
+/*
+ * Encourage the compiler to tail-call to a function, rather than inlining.
+ * Minimizes code size across 99 bottles of beer on the wall.
+ */
+#define NI  __attribute__((noinline))
+
+void NI tcg_gen_op1(TCGOpcode opc, TCGArg a1)
 {
     TCGOp *op = tcg_emit_op(opc, 1);
     op->args[0] = a1;
 }
 
-void tcg_gen_op2(TCGOpcode opc, TCGArg a1, TCGArg a2)
+void NI tcg_gen_op2(TCGOpcode opc, TCGArg a1, TCGArg a2)
 {
     TCGOp *op = tcg_emit_op(opc, 2);
     op->args[0] = a1;
     op->args[1] = a2;
 }
 
-void tcg_gen_op3(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3)
+void NI tcg_gen_op3(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3)
 {
     TCGOp *op = tcg_emit_op(opc, 3);
     op->args[0] = a1;
@@ -52,7 +58,7 @@ void tcg_gen_op3(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3)
     op->args[2] = a3;
 }
 
-void tcg_gen_op4(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3, TCGArg a4)
+void NI tcg_gen_op4(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3, TCGArg a4)
 {
     TCGOp *op = tcg_emit_op(opc, 4);
     op->args[0] = a1;
@@ -61,8 +67,8 @@ void tcg_gen_op4(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3, TCGArg a4)
     op->args[3] = a4;
 }
 
-void tcg_gen_op5(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3,
-                 TCGArg a4, TCGArg a5)
+void NI tcg_gen_op5(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3,
+                     TCGArg a4, TCGArg a5)
 {
     TCGOp *op = tcg_emit_op(opc, 5);
     op->args[0] = a1;
@@ -72,8 +78,8 @@ void tcg_gen_op5(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3,
     op->args[4] = a5;
 }
 
-void tcg_gen_op6(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3,
-                 TCGArg a4, TCGArg a5, TCGArg a6)
+void NI tcg_gen_op6(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3,
+                     TCGArg a4, TCGArg a5, TCGArg a6)
 {
     TCGOp *op = tcg_emit_op(opc, 6);
     op->args[0] = a1;
-- 
2.34.1

On 29/10/23 22:08, Richard Henderson wrote:
> Encourage the compiler to tail-call rather than inline
> across the dozens of opcode expanders.
> 
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   tcg/tcg-op.c | 22 ++++++++++++++--------
>   1 file changed, 14 insertions(+), 8 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>