Refine codes and fix several issues (#1094)

Add aot relocation for ".rodata.str" symbol to support more cases
Fix some coding style issues
Fix aot block/value stack destroy issue
Refine classic/fast interpreter codes
Clear compile warning of libc_builtin_wrapper.c in 32-bit platform

core/iwasm/interpreter/wasm_interp_classic.c

@@ -694,7 +694,7 @@ static inline int64
 sign_ext_8_64(int8 val)
 {
     if (val & 0x80)
-        return (int64)val | (int64)0xffffffffffffff00;
+        return (int64)val | (int64)0xffffffffffffff00LL;
     return val;
 }
 
@@ -702,7 +702,7 @@ static inline int64
 sign_ext_16_64(int16 val)
 {
     if (val & 0x8000)
-        return (int64)val | (int64)0xffffffffffff0000;
+        return (int64)val | (int64)0xffffffffffff0000LL;
     return val;
 }
 
@@ -710,15 +710,19 @@ static inline int64
 sign_ext_32_64(int32 val)
 {
     if (val & (int32)0x80000000)
-        return (int64)val | (int64)0xffffffff00000000;
+        return (int64)val | (int64)0xffffffff00000000LL;
     return val;
 }
 
 static inline void
 word_copy(uint32 *dest, uint32 *src, unsigned num)
 {
-    for (; num > 0; num--)
-        *dest++ = *src++;
+    if (dest != src) {
+        /* No overlap buffer */
+        bh_assert(!((src < dest) && (dest < src + num)));
+        for (; num > 0; num--)
+            *dest++ = *src++;
+    }
 }
 
 static inline WASMInterpFrame *
@@ -1067,7 +1071,7 @@ wasm_interp_call_func_bytecode(WASMModuleInstance *module,
             {
                 value_type = *frame_ip++;
                 param_cell_num = 0;
-                cell_num = wasm_value_type_cell_num(value_type);
+                cell_num = 0;
             handle_op_loop:
                 PUSH_CSP(LABEL_TYPE_LOOP, param_cell_num, cell_num, frame_ip);
                 HANDLE_OP_END();

core/iwasm/interpreter/wasm_interp_fast.c

@@ -764,7 +764,7 @@ static inline int64
 sign_ext_8_64(int8 val)
 {
     if (val & 0x80)
-        return (int64)val | (int64)0xffffffffffffff00;
+        return (int64)val | (int64)0xffffffffffffff00LL;
     return val;
 }
 
@@ -772,7 +772,7 @@ static inline int64
 sign_ext_16_64(int16 val)
 {
     if (val & 0x8000)
-        return (int64)val | (int64)0xffffffffffff0000;
+        return (int64)val | (int64)0xffffffffffff0000LL;
     return val;
 }
 
@@ -780,15 +780,19 @@ static inline int64
 sign_ext_32_64(int32 val)
 {
     if (val & (int32)0x80000000)
-        return (int64)val | (int64)0xffffffff00000000;
+        return (int64)val | (int64)0xffffffff00000000LL;
     return val;
 }
 
 static inline void
 word_copy(uint32 *dest, uint32 *src, unsigned num)
 {
-    for (; num > 0; num--)
-        *dest++ = *src++;
+    if (dest != src) {
+        /* No overlap buffer */
+        bh_assert(!((src < dest) && (dest < src + num)));
+        for (; num > 0; num--)
+            *dest++ = *src++;
+    }
 }
 
 static inline WASMInterpFrame *

core/iwasm/interpreter/wasm_runtime.c

@@ -1099,18 +1099,12 @@ check_linked_symbol(WASMModuleInstance *module_inst, char *error_buf,
             && !func->import_func_linked
 #endif
         ) {
-#if WASM_ENABLE_SPEC_TEST != 0
-            set_error_buf(error_buf, error_buf_size,
-                          "unknown import or incompatible import type");
-            return false;
-#else
 #if WASM_ENABLE_WAMR_COMPILER == 0
             LOG_WARNING("warning: failed to link import function (%s, %s)",
                         func->module_name, func->field_name);
 #else
             /* do nothing to avoid confused message */
 #endif /* WASM_ENABLE_WAMR_COMPILER == 0 */
-#endif /* WASM_ENABLE_SPEC_TEST != 0 */
         }
     }