test/Feature/EscapingFunctionsAlias.c: clarify alias(ee) casting

1 files changed, 14 insertions, 8 deletions

diff --git a/test/Feature/EscapingFunctionsAlias.c b/test/Feature/EscapingFunctionsAlias.c
index 7eb2a962..933a23ca 100644
--- a/test/Feature/EscapingFunctionsAlias.c
+++ b/test/Feature/EscapingFunctionsAlias.c
@@ -5,23 +5,25 @@
 // RUN: %klee -debug-print-escaping-functions --output-dir=%t.klee-out %t.bc 2> %t.log
 // RUN: FileCheck --input-file=%t.log %s
 
+#include <stdint.h>
+
 void global_alias(void) __attribute__((alias("global_aliasee")));
 void global_aliasee(void) {
     return;
 }
 
-short bitcast_of_alias(void) __attribute__((alias("bitcast_of_global_alias")));
-short bitcast_of_global_alias(void) {
+uint8_t bitcast_of_alias(void) __attribute__((alias("bitcast_of_global_alias")));
+uint8_t bitcast_of_global_alias(void) {
     return 1;
 }
 
-short bitcast_of_aliasee(void) __attribute__((alias("bitcast_of_global_aliasee")));
-short bitcast_of_global_aliasee(void) {
+uint8_t bitcast_of_aliasee(void) __attribute__((alias("bitcast_of_global_aliasee")));
+uint8_t bitcast_of_global_aliasee(void) {
     return 1;
 }
 
-int bitcast_in_global_alias(void) __attribute__((alias("bitcast_in_alias")));
-short bitcast_in_alias(void) {
+uint64_t bitcast_in_global_alias(void) __attribute__((alias("bitcast_in_alias")));
+uint8_t bitcast_in_alias(void) {
     return 1;
 }
 
@@ -29,13 +31,17 @@ int main(int argc, char *argv[]) {
     global_aliasee();
     global_alias();
 
-    int (*f1)(void) =(int (*)(void))bitcast_of_alias;
+    // casting alias
+    // should result in aliasee being marked as escaping
+    uint64_t (*f1)(void) =(uint64_t (*)(void))bitcast_of_alias;
     f1();
 
-    int (*f2)(void) =(int (*)(void))bitcast_of_global_aliasee;
+    // casting aliasee
+    uint64_t (*f2)(void) =(uint64_t (*)(void))bitcast_of_global_aliasee;
     f2();
 
     bitcast_in_alias();
+    // cast when aliasing should not result in either function being marked as escaping
     bitcast_in_global_alias();
 
     // CHECK: KLEE: escaping functions: {{\[((bitcast_of_global_alias|bitcast_of_global_aliasee), ){2}\]}}