druntime: Fix backtrace tests with -O in 'exceptions' integration test

Author: kinke

runtime/druntime/test/exceptions/Makefile

@@ -106,7 +106,9 @@ $(ROOT)/static_dtor.done: private negate=!
 $(ROOT)/future_message.done: stderr_exp="exception I have a custom message. exception exception "
 $(ROOT)/catch_in_finally.done: stderr_exp="success."
 $(ROOT)/rt_trap_exceptions.done: stderr_exp="object.Exception@src/rt_trap_exceptions.d(12): this will abort"
+ifneq ($(BUILD)-$(IN_LDC),release-1) # disable 2nd expression for LDC in BUILD=release mode
 $(ROOT)/rt_trap_exceptions.done: stderr_exp2="src/rt_trap_exceptions.d:8 main"
+endif
 $(ROOT)/assert_fail.done: stderr_exp="success."
 $(ROOT)/cpp_demangle.done: stderr_exp="thrower(int)"
 $(ROOT)/message_with_null.done: stderr_exp=" world"

runtime/druntime/test/exceptions/src/cpp_demangle.d

@@ -6,6 +6,7 @@ extern(C) char* __cxa_demangle (const char* mangled_name,
                                                 int* status) nothrow pure @trusted;
 
 extern (C++) void thrower(int a) {
+    version (LDC) pragma(inline, false);
     throw new Exception("C++ ex");
 }
 void caller() {
@@ -17,3 +18,9 @@ void main()
     caller();
     __cxa_demangle(null, null, null, null); // make sure __cxa_demangle is linked
 }
+
+version (LDC) version (D_Optimized)
+{
+    // really make sure libstdc++ is linked
+    shared bla = &__cxa_demangle;
+}

runtime/druntime/test/exceptions/src/line_trace.d

@@ -13,6 +13,6 @@ void main()
 }
 
 void f1()
-{
+{   version (LDC) pragma(inline, false);
     throw new Exception("exception");
 }

runtime/druntime/test/exceptions/src/long_backtrace_trunc.d

@@ -7,7 +7,7 @@ struct FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
 struct GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG {
 struct HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH {
      T tttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt(int x) {
-    throw new Exception("test");
+        version (LDC) pragma(inline, false); throw new Exception("test");
     }
 }
 }