Silence unintended fallthrough diagnostic on a case label preceded with a normal label.

Summary:
It's unlikely that a fallthrough is unintended in the following code:
switch (n) {
...
  label:
  case 1:
...
    goto label;
...
}

Reviewers: rsmith, doug.gregor

Reviewed By: doug.gregor

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D329

llvm-svn: 173486

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/switch-implicit-fallthrough.cpp b/clang/test/SemaCXX/switch-implicit-fallthrough.cpp
index 75dda8a9617..93e724e86c6 100644
--- a/clang/test/SemaCXX/switch-implicit-fallthrough.cpp
+++ b/clang/test/SemaCXX/switch-implicit-fallthrough.cpp
@@ -38,6 +38,18 @@ int fallthrough(int n) {
     case 68:
       break;
   }
+  switch (n / 15) {
+label_case_70:
+    case 70:
+      n += 333;
+      break;
+    case 71:
+      n += 334;
+      goto label_case_70;
+    case 72:
+      n += 335;
+      break;
+  }
   switch (n / 20) {
     case 7:
       n += 400;