[PATCH 1/5] target/i386: Tidy cc_op_str usage

[Richard Henderson <richard.henderson@linaro.org>]

Make const.  Use the read-only strings directly; do not copy
them into an on-stack buffer with snprintf.  Allow for holes
in the cc_op_str array, now present with CC_OP_POPCNT.

Fixes: 460231ad369 ("target/i386: give CC_OP_POPCNT low bits corresponding to MO_TL")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/i386/cpu-dump.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/target/i386/cpu-dump.c b/target/i386/cpu-dump.c
index 3bb8e44091..dc6723aede 100644
--- a/target/i386/cpu-dump.c
+++ b/target/i386/cpu-dump.c
@@ -27,7 +27,7 @@
 /***********************************************************/
 /* x86 debug */
 
-static const char *cc_op_str[CC_OP_NB] = {
+static const char * const cc_op_str[] = {
     [CC_OP_DYNAMIC] = "DYNAMIC",
 
     [CC_OP_EFLAGS] = "EFLAGS",
@@ -347,7 +347,6 @@ void x86_cpu_dump_state(CPUState *cs, FILE *f, int flags)
     X86CPU *cpu = X86_CPU(cs);
     CPUX86State *env = &cpu->env;
     int eflags, i, nb;
-    char cc_op_name[32];
     static const char *seg_name[6] = { "ES", "CS", "SS", "DS", "FS", "GS" };
 
     eflags = cpu_compute_eflags(env);
@@ -456,10 +455,16 @@ void x86_cpu_dump_state(CPUState *cs, FILE *f, int flags)
                      env->dr[6], env->dr[7]);
     }
     if (flags & CPU_DUMP_CCOP) {
-        if ((unsigned)env->cc_op < CC_OP_NB)
-            snprintf(cc_op_name, sizeof(cc_op_name), "%s", cc_op_str[env->cc_op]);
-        else
-            snprintf(cc_op_name, sizeof(cc_op_name), "[%d]", env->cc_op);
+        const char *cc_op_name = NULL;
+        char cc_op_buf[32];
+
+        if ((unsigned)env->cc_op < ARRAY_SIZE(cc_op_str)) {
+            cc_op_name = cc_op_str[env->cc_op];
+        }
+        if (cc_op_name == NULL) {
+            snprintf(cc_op_buf, sizeof(cc_op_buf), "[%d]", env->cc_op);
+            cc_op_name = cc_op_buf;
+        }
 #ifdef TARGET_X86_64
         if (env->hflags & HF_CS64_MASK) {
             qemu_fprintf(f, "CCS=%016" PRIx64 " CCD=%016" PRIx64 " CCO=%s\n",
-- 
2.34.1