tcg: Move tcg prologue pointer out of TCGContext

This value is constant across all thread-local copies of TCGContext,
so we might as well move it out of thread-local storage.

Use the correct function pointer type, and name the variable
tcg_qemu_tb_exec, which means that we are able to remove the
macro that does the casting.

Replace HAVE_TCG_QEMU_TB_EXEC with CONFIG_TCG_INTERPRETER,
as this is somewhat clearer in intent.

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

1 files changed, 8 insertions, 1 deletions

diff --git a/tcg/tcg.c b/tcg/tcg.c
index 759a41d848..b686cc9ba8 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -162,6 +162,10 @@ static TCGContext **tcg_ctxs;
 static unsigned int n_tcg_ctxs;
 TCGv_env cpu_env = 0;
 
+#ifndef CONFIG_TCG_INTERPRETER
+tcg_prologue_fn *tcg_qemu_tb_exec;
+#endif
+
 struct tcg_region_tree {
     QemuMutex lock;
     GTree *tree;
@@ -1055,7 +1059,10 @@ void tcg_prologue_init(TCGContext *s)
     s->code_ptr = buf0;
     s->code_buf = buf0;
     s->data_gen_ptr = NULL;
-    s->code_gen_prologue = buf0;
+
+#ifndef CONFIG_TCG_INTERPRETER
+    tcg_qemu_tb_exec = (tcg_prologue_fn *)buf0;
+#endif
 
     /* Compute a high-water mark, at which we voluntarily flush the buffer
        and start over.  The size here is arbitrary, significantly larger