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[PATCH v2 1/4] target/nios2: add DISAS_NORETURN case for nothing more to
From: |
Wentong Wu |
Subject: |
[PATCH v2 1/4] target/nios2: add DISAS_NORETURN case for nothing more to generate |
Date: |
Fri, 10 Jul 2020 19:34:30 -0400 |
Add DISAS_NORETURN case for nothing more to generate because at runtime
execution will never return from some helper call. And at the same time
replace DISAS_UPDATE in t_gen_helper_raise_exception and gen_exception
with the newly added DISAS_NORETURN.
Signed-off-by: Wentong Wu <wentong.wu@intel.com>
---
target/nios2/translate.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/target/nios2/translate.c b/target/nios2/translate.c
index e17656e6..b052be85 100644
--- a/target/nios2/translate.c
+++ b/target/nios2/translate.c
@@ -149,7 +149,7 @@ static void t_gen_helper_raise_exception(DisasContext *dc,
tcg_gen_movi_tl(dc->cpu_R[R_PC], dc->pc);
gen_helper_raise_exception(dc->cpu_env, tmp);
tcg_temp_free_i32(tmp);
- dc->is_jmp = DISAS_UPDATE;
+ dc->is_jmp = DISAS_NORETURN;
}
static bool use_goto_tb(DisasContext *dc, uint32_t dest)
@@ -802,7 +802,7 @@ static void gen_exception(DisasContext *dc, uint32_t excp)
tcg_gen_movi_tl(cpu_R[R_PC], dc->pc);
gen_helper_raise_exception(cpu_env, tmp);
tcg_temp_free_i32(tmp);
- dc->is_jmp = DISAS_UPDATE;
+ dc->is_jmp = DISAS_NORETURN;
}
/* generate intermediate code for basic block 'tb'. */
@@ -877,6 +877,7 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock
*tb, int max_insns)
tcg_gen_exit_tb(NULL, 0);
break;
+ case DISAS_NORETURN:
case DISAS_TB_JUMP:
/* nothing more to generate */
break;
--
2.21.3
- [PATCH v2 1/4] target/nios2: add DISAS_NORETURN case for nothing more to generate,
Wentong Wu <=