Fix sizeof operator behavior

sizeof with pointer typee should generate target pointer size instead
of compiler's host pointer size.

src/parser.c

@@ -862,7 +862,7 @@ void read_expr_operand(block_t *parent, basic_block_t **bb)
 
         ph1_ir = add_ph1_ir(OP_load_constant);
         vd = require_var(parent);
-        vd->init_val = ptr_cnt ? HOST_PTR_SIZE : type->size;
+        vd->init_val = ptr_cnt ? PTR_SIZE : type->size;
         strcpy(vd->var_name, gen_name());
         ph1_ir->dest = vd;
         opstack_push(vd);

tests/driver.sh

@@ -4,12 +4,6 @@ set -u
 
 readonly SHECC="$PWD/out/shecc"
 
-if [ "$(getconf LONG_BIT)" == "64" ]; then
-    readonly HOST_PTR_SIZE=8
-else
-    readonly HOST_PTR_SIZE=4
-fi
-
 # try - test shecc with given code
 # Usage:
 # - try exit_code input_code
@@ -416,25 +410,25 @@ expr 1 "sizeof(_Bool)";
 expr 1 "sizeof(char)";
 expr 4 "sizeof(int)";
 # sizeof pointers
-expr $HOST_PTR_SIZE "sizeof(void*)";
-expr $HOST_PTR_SIZE "sizeof(_Bool*)";
-expr $HOST_PTR_SIZE "sizeof(char*)";
-expr $HOST_PTR_SIZE "sizeof(int*)";
+expr 4 "sizeof(void*)";
+expr 4 "sizeof(_Bool*)";
+expr 4 "sizeof(char*)";
+expr 4 "sizeof(int*)";
 # sizeof multi-level pointer
-expr $HOST_PTR_SIZE "sizeof(void**)";
-expr $HOST_PTR_SIZE "sizeof(_Bool**)";
-expr $HOST_PTR_SIZE "sizeof(char**)";
-expr $HOST_PTR_SIZE "sizeof(int**)";
+expr 4 "sizeof(void**)";
+expr 4 "sizeof(_Bool**)";
+expr 4 "sizeof(char**)";
+expr 4 "sizeof(int**)";
 # sizeof struct
-try_ $HOST_PTR_SIZE << EOF
+try_ 4 << EOF
 typedef struct {
     int a;
     int b;
 } struct_t;
 int main() { return sizeof(struct_t*); }
 EOF
 # sizeof enum
-try_ $HOST_PTR_SIZE << EOF
+try_ 4 << EOF
 typedef enum {
     A,
     B