target/i386: Simplify gen_debug usage

Both invocations pass the start of the current instruction,
which is available as s->base.pc_next.  The function sets
is_jmp, so we can eliminate a second setting.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210514151342.384376-36-richard.henderson@linaro.org>

target/i386/tcg/translate.c

@@ -2614,10 +2614,10 @@ static void gen_interrupt(DisasContext *s, int intno,
     s->base.is_jmp = DISAS_NORETURN;
 }
 
-static void gen_debug(DisasContext *s, target_ulong cur_eip)
+static void gen_debug(DisasContext *s)
 {
     gen_update_cc_op(s);
-    gen_jmp_im(s, cur_eip);
+    gen_jmp_im(s, s->base.pc_next - s->cs_base);
     gen_helper_debug(cpu_env);
     s->base.is_jmp = DISAS_NORETURN;
 }
@@ -7152,7 +7152,7 @@ static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
 #ifdef WANT_ICEBP
     case 0xf1: /* icebp (undocumented, exits to external debugger) */
         gen_svm_check_intercept(s, pc_start, SVM_EXIT_ICEBP);
-        gen_debug(s, pc_start - s->cs_base);
+        gen_debug(s);
         break;
 #endif
     case 0xfa: /* cli */
@@ -8586,8 +8586,7 @@ static bool i386_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu,
     /* If RF is set, suppress an internally generated breakpoint.  */
     int flags = dc->base.tb->flags & HF_RF_MASK ? BP_GDB : BP_ANY;
     if (bp->flags & flags) {
-        gen_debug(dc, dc->base.pc_next - dc->cs_base);
-        dc->base.is_jmp = DISAS_NORETURN;
+        gen_debug(dc);
         /* The address covered by the breakpoint must be included in
            [tb->pc, tb->pc + tb->size) in order to for it to be
            properly cleared -- thus we increment the PC here so that