[polly] r271512 - [FIX] Ensure wrapping checks for unary expressions

[Johannes Doerfert via llvm-commits]

Author: jdoerfert
Date: Thu Jun  2 06:08:43 2016
New Revision: 271512

URL: http://llvm.org/viewvc/llvm-project?rev=271512&view=rev
Log:
[FIX] Ensure wrapping checks for unary expressions

Modified:
    polly/trunk/lib/CodeGen/IslExprBuilder.cpp

Modified: polly/trunk/lib/CodeGen/IslExprBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/polly/trunk/lib/CodeGen/IslExprBuilder.cpp?rev=271512&r1=271511&r2=271512&view=diff
==============================================================================
--- polly/trunk/lib/CodeGen/IslExprBuilder.cpp (original)
+++ polly/trunk/lib/CodeGen/IslExprBuilder.cpp Thu Jun  2 06:08:43 2016
@@ -162,7 +162,7 @@ Value *IslExprBuilder::createOpUnary(__i
     V = Builder.CreateSExt(V, MaxType);
 
   isl_ast_expr_free(Expr);
-  return Builder.CreateNSWNeg(V);
+  return createSub(ConstantInt::getNullValue(MaxType), V);
 }
 
 Value *IslExprBuilder::createOpNAry(__isl_take isl_ast_expr *Expr) {