Fix IOC warnings

av1_txfm.h: left shift of a negative number
av1/encoder/quantize.c: unsigned int overflow
aom_dsp/entenc.c: unsigned int overflow

Change-Id: I6143e68f7d6e2621f97900808c8ef7ee0ad0c814

aom_dsp/entenc.c

diff --git a/aom_dsp/entenc.c b/aom_dsp/entenc.c
index 390f61b..214f183 100644
--- a/aom_dsp/entenc.c
+++ b/aom_dsp/entenc.c
@@ -514,7 +514,7 @@
   unsigned char *out;
   uint32_t storage;
   uint16_t *buf;
-  uint32_t offs;
+  int offs;
   uint32_t end_offs;
   int nend_bits;
   od_ec_window m;
@@ -554,7 +554,7 @@
   if (s > 0) {
     unsigned n;
     storage = enc->precarry_storage;
-    if (offs + ((s + 7) >> 3) > storage) {
+    if (offs + ((s + 7) >> 3) > (int)storage) {
       storage = storage * 2 + ((s + 7) >> 3);
       buf = (uint16_t *)realloc(buf, sizeof(*buf) * storage);
       if (buf == NULL) {
@@ -566,7 +566,7 @@
     }
     n = (1 << (c + 16)) - 1;
     do {
-      OD_ASSERT(offs < storage);
+      OD_ASSERT(offs < (int)storage);
       buf[offs++] = (uint16_t)(e >> (c + 16));
       e &= n;
       s -= 8;

av1/common/av1_txfm.h

diff --git a/av1/common/av1_txfm.h b/av1/common/av1_txfm.h
index 3b78981..c2f1b1a 100644
--- a/av1/common/av1_txfm.h
+++ b/av1/common/av1_txfm.h
@@ -81,7 +81,7 @@
       }
     } else {
       for (i = 0; i < size; i++) {
-        arr[i] = arr[i] << (-bit);
+        arr[i] = arr[i] * (1 << (-bit));
       }
     }
   }

av1/encoder/quantize.c

diff --git a/av1/encoder/quantize.c b/av1/encoder/quantize.c
index 644a4c3..da01642 100644
--- a/av1/encoder/quantize.c
+++ b/av1/encoder/quantize.c
@@ -1464,7 +1464,8 @@
 #else
         const uint32_t abs_qcoeff =
             (uint32_t)((tmp2 * quant_shift_ptr[rc != 0]) >> shift);
-        qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
+        qcoeff_ptr[rc] =
+            (tran_low_t)((int)(abs_qcoeff ^ coeff_sign) - coeff_sign);
         dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0] / scale;
 #endif  // CONFIG_AOM_QM
         if (abs_qcoeff) eob = i;