Recognize while(1) and avoid extra blocks.

llvm-svn: 42811

1 files changed, 62 insertions, 0 deletions

diff --git a/clang/test/CodeGen/whilestmt.c b/clang/test/CodeGen/whilestmt.c
new file mode 100644
index 00000000000..8ded265d0c0
--- /dev/null
+++ b/clang/test/CodeGen/whilestmt.c
@@ -0,0 +1,62 @@
+// RUN: clang %s -emit-llvm
+
+int bar();
+int foo() {
+  int i;
+  i = 1 + 2;
+  while(1) {
+    i = bar();
+    i = bar();
+  };
+  return i;
+}
+
+
+int foo1() {
+  int i;
+  i = 1 + 2;
+  while(1) {
+    i = bar();
+    if (i == 42)
+      break;
+    i = bar();
+  };
+  return i;
+}
+
+
+int foo2() {
+  int i;
+  i = 1 + 2;
+  while(1) {
+    i = bar();
+    if (i == 42)
+      continue;
+    i = bar();
+  };
+  return i;
+}
+
+
+int foo3() {
+  int i;
+  i = 1 + 2;
+  while(1) {
+    i = bar();
+    if (i == 42)
+      break;
+  };
+  return i;
+}
+
+
+int foo4() {
+  int i;
+  i = 1 + 2;
+  while(1) {
+    i = bar();
+    if (i == 42)
+      continue;
+  };
+  return i;
+}