Bugs with 1- empty bitfields, 2- anonymous bitfields, 3- result type of reading a small unsigned bitfield

git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1496 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e

5 files changed, 51 insertions, 0 deletions

diff --git a/test/regression/Makefile b/test/regression/Makefile
index 06ad9ef..44e1718 100644
--- a/test/regression/Makefile
+++ b/test/regression/Makefile
@@ -8,6 +8,7 @@ LIBS=$(LIBMATH)
 
 # Can run and have reference output in Results
 TESTS=bitfields1 bitfields2 bitfields3 bitfields4 \
+  bitfields5 bitfields6 \
   expr1 initializers volatile2 \
   funct3 expr5 struct7 struct8 casts1 casts2
 
diff --git a/test/regression/Results/bitfields5 b/test/regression/Results/bitfields5
new file mode 100644
index 0000000..1734b08
--- /dev/null
+++ b/test/regression/Results/bitfields5
@@ -0,0 +1,2 @@
+f0 = 1, f1 = 2, f2 = 3, second = 3
+f0 = 123, f1 = 4, f2 = 56, second = 56
diff --git a/test/regression/Results/bitfields6 b/test/regression/Results/bitfields6
new file mode 100644
index 0000000..7cf930c
--- /dev/null
+++ b/test/regression/Results/bitfields6
@@ -0,0 +1,2 @@
+g = 0
+h = 1
diff --git a/test/regression/bitfields5.c b/test/regression/bitfields5.c
new file mode 100644
index 0000000..169098e
--- /dev/null
+++ b/test/regression/bitfields5.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+
+struct S1 {
+  unsigned f0 : 13;
+  unsigned : 6;
+  unsigned f1 : 5;
+  unsigned : 0;
+  unsigned f2 : 8;
+};
+
+struct S1 g_207 = {1,2,3};
+
+void print_S1(struct S1 * p)
+{
+  printf("f0 = %u, f1 = %u, f2 = %u, second = %u\n",
+         p->f0, p->f1, p->f2, 
+         *((unsigned char *)p + 4));
+}
+
+int main()
+{
+  struct S1 x;
+
+  print_S1(&g_207);
+  x.f0 = 123; x.f1 = 4; x.f2 = 56;
+  print_S1(&x);
+  return 0;
+}
diff --git a/test/regression/bitfields6.c b/test/regression/bitfields6.c
new file mode 100644
index 0000000..3c2dcbe
--- /dev/null
+++ b/test/regression/bitfields6.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+struct S0 {
+   unsigned f : 10;
+};
+
+struct S1 {
+   unsigned f : 32;
+};
+
+int main(void)
+{
+    struct S0 l = {1};
+    struct S1 m = {1};
+    printf("g = %d\n", (-1 >= l.f));
+    printf("h = %d\n", (-1 >= m.f));
+    return 0;
+}