softmmu: remove useless condition in watchpoint check

cpu_check_watchpoint function checks cpu->watchpoint_hit at the entry.
But then it also does the same in the middle of the function,
while this field can't change.
That is why this patch removes this useless condition.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <163542169094.2127597.8801843697434113110.stgit@pasha-ThinkPad-X280>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/softmmu/physmem.c b/softmmu/physmem.c
index d587526..9765a50 100644 (file)
--- a/softmmu/physmem.c
+++ b/softmmu/physmem.c
@@ -929,27 +929,26 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
             }
             wp->hitaddr = MAX(addr, wp->vaddr);
             wp->hitattrs = attrs;
-            if (!cpu->watchpoint_hit) {
-                if (wp->flags & BP_CPU && cc->tcg_ops->debug_check_watchpoint &&
-                    !cc->tcg_ops->debug_check_watchpoint(cpu, wp)) {
-                    wp->flags &= ~BP_WATCHPOINT_HIT;
-                    continue;
-                }
-                cpu->watchpoint_hit = wp;
-
-                mmap_lock();
-                /* This call also restores vCPU state */
-                tb_check_watchpoint(cpu, ra);
-                if (wp->flags & BP_STOP_BEFORE_ACCESS) {
-                    cpu->exception_index = EXCP_DEBUG;
-                    mmap_unlock();
-                    cpu_loop_exit(cpu);
-                } else {
-                    /* Force execution of one insn next time.  */
-                    cpu->cflags_next_tb = 1 | curr_cflags(cpu);
-                    mmap_unlock();
-                    cpu_loop_exit_noexc(cpu);
-                }
+
+            if (wp->flags & BP_CPU && cc->tcg_ops->debug_check_watchpoint &&
+                !cc->tcg_ops->debug_check_watchpoint(cpu, wp)) {
+                wp->flags &= ~BP_WATCHPOINT_HIT;
+                continue;
+            }
+            cpu->watchpoint_hit = wp;
+
+            mmap_lock();
+            /* This call also restores vCPU state */
+            tb_check_watchpoint(cpu, ra);
+            if (wp->flags & BP_STOP_BEFORE_ACCESS) {
+                cpu->exception_index = EXCP_DEBUG;
+                mmap_unlock();
+                cpu_loop_exit(cpu);
+            } else {
+                /* Force execution of one insn next time.  */
+                cpu->cflags_next_tb = 1 | curr_cflags(cpu);
+                mmap_unlock();
+                cpu_loop_exit_noexc(cpu);
             }
         } else {
             wp->flags &= ~BP_WATCHPOINT_HIT;