tcg: Constify tcg_code_gen_epilogue

Now that all native tcg hosts support splitwx,
make this pointer const.

Reviewed-by: Joelle van Dyne <j@getutm.app>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/tcg/tcg.h

@@ -677,7 +677,7 @@ struct TCGContext {
 
 extern TCGContext tcg_init_ctx;
 extern __thread TCGContext *tcg_ctx;
-extern void *tcg_code_gen_epilogue;
+extern const void *tcg_code_gen_epilogue;
 extern uintptr_t tcg_splitwx_diff;
 extern TCGv_env cpu_env;
 

tcg/aarch64/tcg-target.c.inc

@@ -2900,8 +2900,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
      * Return path for goto_ptr. Set return value to 0, a-la exit_tb,
      * and fall through to the rest of the epilogue.
      */
-    /* TODO: Cast goes away when all hosts converted */
-    tcg_code_gen_epilogue = (void *)tcg_splitwx_to_rx(s->code_ptr);
+    tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr);
     tcg_out_movi(s, TCG_TYPE_REG, TCG_REG_X0, 0);
 
     /* TB epilogue */

tcg/arm/tcg-target.c.inc

@@ -2301,8 +2301,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
      * Return path for goto_ptr. Set return value to 0, a-la exit_tb,
      * and fall through to the rest of the epilogue.
      */
-    /* TODO: Cast goes away when all hosts converted */
-    tcg_code_gen_epilogue = (void *)tcg_splitwx_to_rx(s->code_ptr);
+    tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr);
     tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R0, 0);
     tcg_out_epilogue(s);
 }

tcg/i386/tcg-target.c.inc

@@ -3804,8 +3804,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
      * Return path for goto_ptr. Set return value to 0, a-la exit_tb,
      * and fall through to the rest of the epilogue.
      */
-    /* TODO: Cast goes away when all hosts converted */
-    tcg_code_gen_epilogue = (void *)tcg_splitwx_to_rx(s->code_ptr);
+    tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr);
     tcg_out_movi(s, TCG_TYPE_REG, TCG_REG_EAX, 0);
 
     /* TB epilogue */

tcg/mips/tcg-target.c.inc

@@ -2473,8 +2473,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
      * Return path for goto_ptr. Set return value to 0, a-la exit_tb,
      * and fall through to the rest of the epilogue.
      */
-    /* TODO: Cast goes away when all hosts converted */
-    tcg_code_gen_epilogue = (void *)tcg_splitwx_to_rx(s->code_ptr);
+    tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr);
     tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_V0, TCG_REG_ZERO);
 
     /* TB epilogue */

tcg/ppc/tcg-target.c.inc

@@ -2346,8 +2346,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
     tcg_out32(s, BCCTR | BO_ALWAYS);
 
     /* Epilogue */
-    /* TODO: Cast goes away when all hosts converted */
-    tcg_code_gen_epilogue = (void *)tcg_splitwx_to_rx(s->code_ptr);
+    tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr);
 
     tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_R0, TCG_REG_R1, FRAME_SIZE+LR_OFFSET);
     for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); ++i) {

tcg/riscv/tcg-target.c.inc

@@ -1784,8 +1784,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
     tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, tcg_target_call_iarg_regs[1], 0);
 
     /* Return path for goto_ptr. Set return value to 0 */
-    /* TODO: Cast goes away when all hosts converted */
-    tcg_code_gen_epilogue = (void *)tcg_splitwx_to_rx(s->code_ptr);
+    tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr);
     tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_A0, TCG_REG_ZERO);
 
     /* TB epilogue */

tcg/s390/tcg-target.c.inc

@@ -2551,8 +2551,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
      * Return path for goto_ptr. Set return value to 0, a-la exit_tb,
      * and fall through to the rest of the epilogue.
      */
-    /* TODO: Cast goes away when all hosts converted */
-    tcg_code_gen_epilogue = (void *)tcg_splitwx_to_rx(s->code_ptr);
+    tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr);
     tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R2, 0);
 
     /* TB epilogue */

tcg/sparc/tcg-target.c.inc

@@ -1039,8 +1039,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
     tcg_out_nop(s);
 
     /* Epilogue for goto_ptr.  */
-    /* TODO: Cast goes away when all hosts converted */
-    tcg_code_gen_epilogue = (void *)tcg_splitwx_to_rx(s->code_ptr);
+    tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr);
     tcg_out_arithi(s, TCG_REG_G0, TCG_REG_I7, 8, RETURN);
     /* delay slot */
     tcg_out_movi_imm13(s, TCG_REG_O0, 0);

tcg/tcg.c

@@ -161,7 +161,7 @@ static int tcg_out_ldst_finalize(TCGContext *s);
 static TCGContext **tcg_ctxs;
 static unsigned int n_tcg_ctxs;
 TCGv_env cpu_env = 0;
-void *tcg_code_gen_epilogue;
+const void *tcg_code_gen_epilogue;
 uintptr_t tcg_splitwx_diff;
 
 #ifndef CONFIG_TCG_INTERPRETER