Optimize 64-bit compares with zero

crosstest/test_icmp.cpp

Index: crosstest/test_icmp.cpp
diff --git a/crosstest/test_icmp.cpp b/crosstest/test_icmp.cpp
index 60575450a13b4f26bddc682ea5484a480c315833..0b1d1aaa7547010c73d8162e55c32904dd4efb0d 100644
--- a/crosstest/test_icmp.cpp
+++ b/crosstest/test_icmp.cpp
@@ -24,7 +24,11 @@
   bool icmp##cmp(uint64 a, uint64 b) { return a op b; }                        \
   v4ui32 icmp##cmp(v4ui32 a, v4ui32 b) { return a op b; }                      \
   v8ui16 icmp##cmp(v8ui16 a, v8ui16 b) { return a op b; }                      \
-  v16ui8 icmp##cmp(v16ui8 a, v16ui8 b) { return a op b; }
+  v16ui8 icmp##cmp(v16ui8 a, v16ui8 b) { return a op b; }                      \
+  bool icmp_zero##cmp(uint8_t a) { return a op 0; }                            \
+  bool icmp_zero##cmp(uint16_t a) { return a op 0; }                           \
+  bool icmp_zero##cmp(uint32_t a) { return a op 0; }                           \
+  bool icmp_zero##cmp(uint64 a) { return a op 0; }
 ICMP_U_TABLE
 #undef X
 
@@ -35,6 +39,10 @@ ICMP_U_TABLE
   bool icmp##cmp(int64 a, int64 b) { return a op b; }                          \
   v4si32 icmp##cmp(v4si32 a, v4si32 b) { return a op b; }                      \
   v8si16 icmp##cmp(v8si16 a, v8si16 b) { return a op b; }                      \
-  v16si8 icmp##cmp(v16si8 a, v16si8 b) { return a op b; }
+  v16si8 icmp##cmp(v16si8 a, v16si8 b) { return a op b; }                      \
+  bool icmp_zero##cmp(myint8_t a) { return a op 0; }                           \
+  bool icmp_zero##cmp(int16_t a) { return a op 0; }                            \
+  bool icmp_zero##cmp(int32_t a) { return a op 0; }                            \
+  bool icmp_zero##cmp(int64 a) { return a op 0; }
 ICMP_S_TABLE
 #undef X