test:compile: Add more union and struct tests.

Author: lkorenc

test/vast/Compile/SingleSource/nested-struct-a.c

@@ -0,0 +1,15 @@
+// RUN: %vast-front -o %t %s && (%t; test $? -eq 5)
+
+struct data
+{
+    struct nested
+    {
+        int a;
+    } n;
+};
+
+int main(int argc, char **argv)
+{
+    struct data d = { { 5 } };
+    return d.n.a;
+}

test/vast/Compile/SingleSource/nested-union-a.c

@@ -0,0 +1,19 @@
+// RUN: %vast-front -o %t %s && (%t; test $? -eq 5)
+
+union data
+{
+    unsigned long long l;
+    struct P
+    {
+        int a;
+        int b;
+    } n;
+};
+
+int main(int argc, char **argv)
+{
+    union data d = { 5 };
+    if (d.n.b != 0)
+        return 0;
+    return d.n.a;
+}

test/vast/Compile/SingleSource/nested-union-b.c

@@ -0,0 +1,21 @@
+// RUN: %vast-front -o %t %s && (%t; test $? -eq 5)
+
+union data
+{
+    unsigned long long l;
+    struct P
+    {
+        int a;
+        int b;
+    } n;
+};
+
+int main(int argc, char **argv)
+{
+    union data d;
+    struct P p = { 1, 2 };
+    d.n = p;
+    if (d.l != 0x0000000200000001)
+        return 128;
+    return 5;
+}

test/vast/Compile/SingleSource/union-a.c

@@ -0,0 +1,15 @@
+// RUN: %vast-front -o %t %s && (%t; test $? -eq 18)
+
+union data
+{
+    int a;
+    unsigned long long b;
+    char c;
+};
+
+int main(int argc, char **argv)
+{
+    union data d;
+    d.b = 0xffffffff00000012;
+    return d.a;
+}

test/vast/Compile/SingleSource/union-b.c

@@ -0,0 +1,16 @@
+// RUN: %vast-front -o %t %s && (%t 1 1 1 1; test $? -eq 5)
+
+union data
+{
+    int a;
+    unsigned long long b;
+    char c;
+};
+
+int main(int argc, char **argv)
+{
+    union data d;
+    d.b = 0xffffffff00000012;
+    d.a = argc;
+    return d.c;
+}

test/vast/Compile/SingleSource/union-c.c

@@ -0,0 +1,20 @@
+// RUN: %vast-front -o %t %s && (%t 1 1 1 1; test $? -eq 5)
+
+struct access
+{
+    int l;
+    int h;
+};
+
+union data
+{
+    unsigned long long b;
+    struct access s;
+};
+
+int main(int argc, char **argv)
+{
+    union data d;
+    d.b = 0xffffffff00000000 + argc;
+    return d.s.l;
+}

test/vast/Compile/SingleSource/union-d.c

@@ -0,0 +1,21 @@
+// RUN: %vast-front -o %t %s && (%t 1 1 1 1; test $? -eq 5)
+
+struct access
+{
+    int l;
+    int h;
+};
+
+union data
+{
+    unsigned long long b;
+    struct access s;
+};
+
+int main(int argc, char **argv)
+{
+    union data d;
+    d.b = 0xffffffff00000000 + argc;
+    d.s.h = 0x12;
+    return d.s.l;
+}