[cfe-commits] r59115 - /cfe/trunk/lib/CodeGen/CodeGenFunction.cpp

[Chris Lattner]

Author: lattner
Date: Wed Nov 12 02:13:36 2008
New Revision: 59115

URL: http://llvm.org/viewvc/llvm-project?rev=59115&view=rev
Log:
Handle Unary ! in EmitBranchOnBoolExpr, so that we can efficiently
codegen stuff like "if (!(X && Y))"

Modified:
    cfe/trunk/lib/CodeGen/CodeGenFunction.cpp

Modified: cfe/trunk/lib/CodeGen/CodeGenFunction.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenFunction.cpp?rev=59115&r1=59114&r2=59115&view=diff

==============================================================================
--- cfe/trunk/lib/CodeGen/CodeGenFunction.cpp (original)
+++ cfe/trunk/lib/CodeGen/CodeGenFunction.cpp Wed Nov 12 02:13:36 2008
@@ -263,7 +263,12 @@
       EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock);
       return;
     }
-    
+  }
+  
+  if (const UnaryOperator *CondUOp = dyn_cast<UnaryOperator>(Cond)) {
+    // br(!x, t, f) -> br(x, f, t)
+    if (CondUOp->getOpcode() == UnaryOperator::LNot)
+      return EmitBranchOnBoolExpr(CondUOp->getSubExpr(), FalseBlock, TrueBlock);
   }
   
   // Emit the code with the fully general case.