short circuit && and || when possible. This substantially reduces

the size of the -O0 output on some cases.  For example, on expr.c from
176.gcc, it shrinks the .ll file from 43164 to 42835 lines, and removed
references to two external symbols.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59034 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index a454cece40..04d64e4ee1 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -513,7 +513,13 @@ public:
   //                             Internal Helpers
   //===--------------------------------------------------------------------===//
  
+  /// ContainsLabel - Return true if the statement contains a label in it.  If
+  /// this statement is not executed normally, it not containing a label means
+  /// that we can just remove the code.
+  static bool ContainsLabel(const Stmt *S, bool IgnoreCaseStmts = false);
+  
 private:
+  
   /// EmitIndirectSwitches - Emit code for all of the switch
   /// instructions in IndirectSwitches.
   void EmitIndirectSwitches();