When the user hits ctrl-c, bugpoint should attempt to stop reduction as

quickly as possible and output what it has so far.  If they hit it twice,
bugpoint is killed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22579 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 13 insertions, 0 deletions

diff --git a/tools/bugpoint/ListReducer.h b/tools/bugpoint/ListReducer.h
index daeadba..ff2a11d 100644
--- a/tools/bugpoint/ListReducer.h
+++ b/tools/bugpoint/ListReducer.h
@@ -19,6 +19,8 @@
 #include <iostream>
 
 namespace llvm {
+  
+  extern bool BugpointIsInterrupted;
 
 template<typename ElTy>
 struct ListReducer {
@@ -62,6 +64,12 @@ struct ListReducer {
 
     unsigned MidTop = TheList.size();
     while (MidTop > 1) {
+      // Halt if the user presses ctrl-c.
+      if (BugpointIsInterrupted) {
+        std::cerr << "\n\n*** Reduction Interrupted, cleaning up...\n\n";
+        return true;
+      }
+      
       unsigned Mid = MidTop / 2;
       std::vector<ElTy> Prefix(TheList.begin(), TheList.begin()+Mid);
       std::vector<ElTy> Suffix(TheList.begin()+Mid, TheList.end());
@@ -97,6 +105,11 @@ struct ListReducer {
         Changed = false;
         std::vector<ElTy> TrimmedList;
         for (unsigned i = 1; i < TheList.size()-1; ++i) { // Check interior elts
+          if (BugpointIsInterrupted) {
+            std::cerr << "\n\n*** Reduction Interrupted, cleaning up...\n\n";
+            return true;
+          }
+          
           std::vector<ElTy> TestList(TheList);
           TestList.erase(TestList.begin()+i);