Add CodeGen support for indirect goto.
- Follows emission scheme used by llvm-gcc, i.e. invent an id for
each label whose address is taken and replace each indirect goto by
a switch to each possible target.
- Currently we emit a switch for each indirect goto instead of
merging them as llvm-gcc does.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@54318 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/indirect-goto.c b/test/CodeGen/indirect-goto.c
new file mode 100644
index 0000000..c0dc8a8
--- /dev/null
+++ b/test/CodeGen/indirect-goto.c
@@ -0,0 +1,20 @@
+// RUN: clang -emit-llvm-bc -o - %s | opt -std-compile-opts | llvm-dis > %t &&
+// RUN: grep "ret i32" %t | count 1 &&
+// RUN: grep "ret i32 210" %t | count 1
+
+static int foo(unsigned i) {
+ const void *addrs[] = { &&L1, &&L2, &&L3, &&L4, &&L5 };
+ int res = 1;
+
+ goto *addrs[i];
+ L5: res *= 11;
+ L4: res *= 7;
+ L3: res *= 5;
+ L2: res *= 3;
+ L1: res *= 2;
+ return res;
+}
+
+int bar() {
+ return foo(3);
+}