[OpenMP] Implement __assert_fail in the new device runtime

[jhuber6]

Summary

This patch implements the __assert_fail function in the new device
runtime. This allows users and developers to use the standars assert
function inside of the device.

[tianshilei1992]

openmp/libomptarget/DeviceRTL/src/Debug.cpp

34

No trap?

[jhuber6]

Adding trap, had it in a previous version but forgot to commit that part.

[tianshilei1992]

LG

openmp/libomptarget/DeviceRTL/include/Debug.h

 #ifndef OMPTARGET_DEVICERTL_DEBUG_H
 #define OMPTARGET_DEVICERTL_DEBUG_H
 
 /// Assertion
 ///
 /// {
 extern "C" {
 void __assert_assume(bool cond, const char *exp, const char *file, int line);
+void __assert_fail(const char *assertion, const char *file, unsigned line,
+                   const char *function);
 }
 
 #define ASSERT(e) __assert_assume(e, #e, __FILE__, __LINE__)
 
 ///}
 
 // TODO: We need to allow actual printf.
 #define PRINTF(fmt, ...) (void)fmt;
 #define PRINT(str) PRINTF("%s", str)
 
 #endif

openmp/libomptarget/DeviceRTL/src/Debug.cpp

 void __assert_assume(bool cond, const char *exp, const char *file, int line) {
   if (!cond && config::isDebugMode(config::DebugLevel::Assertion)) {
     PRINTF("ASSERTION failed: %s at %s, line %d\n", exp, file, line);
     __builtin_trap();
   }
 
   __builtin_assume(cond);
 }
+
+void __assert_fail(const char *assertion, const char *file, unsigned line,
+                   const char *function) {
+  PRINTF("%s:%u: %s: Assertion `%s' failed.\n", file, line, function,
+         assertion);
+  __builtin_trap();
+}
 }
 
 #pragma omp end declare target