[PATCH for 7.2?] target/i386: Remove compilation errors when -Werror=maybe-uninitialized

[Eric Auger <eric.auger@redhat.com>]

Initialize r0-3 to avoid compilation errors when
-Werror=maybe-uninitialized is used

../target/i386/ops_sse.h: In function ‘helper_vpermdq_ymm’:
../target/i386/ops_sse.h:2495:13: error: ‘r3’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
 2495 |     d->Q(3) = r3;
      |     ~~~~~~~~^~~~
../target/i386/ops_sse.h:2494:13: error: ‘r2’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
 2494 |     d->Q(2) = r2;
      |     ~~~~~~~~^~~~
../target/i386/ops_sse.h:2493:13: error: ‘r1’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
 2493 |     d->Q(1) = r1;
      |     ~~~~~~~~^~~~
../target/i386/ops_sse.h:2492:13: error: ‘r0’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
 2492 |     d->Q(0) = r0;
      |     ~~~~~~~~^~~~

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Fixes: 790684776861 ("target/i386: reimplement 0x0f 0x3a, add AVX")

---

Am I the only one getting this? Or anything wrong in my setup.
---
 target/i386/ops_sse.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/i386/ops_sse.h b/target/i386/ops_sse.h
index 3cbc36a59d..b77071b8da 100644
--- a/target/i386/ops_sse.h
+++ b/target/i386/ops_sse.h
@@ -2451,7 +2451,7 @@ void glue(helper_vpgatherqq, SUFFIX)(CPUX86State *env,
 #if SHIFT >= 2
 void helper_vpermdq_ymm(Reg *d, Reg *v, Reg *s, uint32_t order)
 {
-    uint64_t r0, r1, r2, r3;
+    uint64_t r0 = 0, r1 = 0, r2 = 0, r3 = 0;
 
     switch (order & 3) {
     case 0:
-- 
2.37.3