Emit the entry block first and the exit block second, then all the blocks in between afterwards. This is what gcc always does, and some out of tree tools depend on that.

llvm-svn: 223193

1 files changed, 7 insertions, 3 deletions

diff --git a/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp b/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp
index 220d7f8b490..685428ee952 100644
--- a/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp
@@ -310,11 +310,15 @@ namespace {
 
       Function *F = SP.getFunction();
       DEBUG(dbgs() << "Function: " << getFunctionName(SP) << "\n");
-      uint32_t i = 0;
-      for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
+
+      Function::iterator BB = F->begin(), E = F->end();
+      Blocks[BB++] = new GCOVBlock(0, os);
+      ReturnBlock = new GCOVBlock(1, os);
+
+      uint32_t i = 2;
+      for (; BB != E; ++BB) {
         Blocks[BB] = new GCOVBlock(i++, os);
       }
-      ReturnBlock = new GCOVBlock(i++, os);
 
       std::string FunctionNameAndLine;
       raw_string_ostream FNLOS(FunctionNameAndLine);