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accel/tcg: Avoid load of icount_decr if unused 

With CF_NOIRQ and without !CF_USE_ICOUNT, the load isn't used.
Avoid emitting it.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
master
Richard Henderson 2023-09-14 07:39:07 -07:00
parent 36e9aab3c5
commit f47a90dacc
1 changed files with 7 additions and 4 deletions
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11
accel/tcg/translator.c
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@ -49,12 +49,15 @@ bool translator_io_start(DisasContextBase *db)
static TCGOp *gen_tb_start(uint32_t cflags)
{
TCGv_i32 count = tcg_temp_new_i32();
TCGv_i32 count = NULL;
TCGOp *icount_start_insn = NULL;
tcg_gen_ld_i32(count, cpu_env,
offsetof(ArchCPU, neg.icount_decr.u32) -
offsetof(ArchCPU, env));
if ((cflags & CF_USE_ICOUNT) || !(cflags & CF_NOIRQ)) {
count = tcg_temp_new_i32();
tcg_gen_ld_i32(count, cpu_env,
offsetof(ArchCPU, neg.icount_decr.u32) -
offsetof(ArchCPU, env));
}
if (cflags & CF_USE_ICOUNT) {
/*