From 3b2fe1d8f651491ae9451ce04761c8b4a4c9b1bf Mon Sep 17 00:00:00 2001
From: Ilia Filippov <ili.filippov@gmail.com>
Date: Tue, 21 Jan 2014 17:26:05 +0400
Subject: [PATCH] adding patch for LLVM. Fix for trunk(select)

---
 .../3_3_3_4_r198267_trunc_of_select.patch     | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 llvm_patches/3_3_3_4_r198267_trunc_of_select.patch

diff --git a/llvm_patches/3_3_3_4_r198267_trunc_of_select.patch b/llvm_patches/3_3_3_4_r198267_trunc_of_select.patch
new file mode 100644
index 00000000..f6a43b3d
--- /dev/null
+++ b/llvm_patches/3_3_3_4_r198267_trunc_of_select.patch
@@ -0,0 +1,34 @@
+Index: lib/IR/ConstantFold.cpp
+===================================================================
+--- lib/IR/ConstantFold.cpp	(revision 197981)
++++ lib/IR/ConstantFold.cpp	(working copy)
+@@ -705,12 +705,23 @@
+     SmallVector<Constant*, 16> Result;
+     Type *Ty = IntegerType::get(CondV->getContext(), 32);
+     for (unsigned i = 0, e = V1->getType()->getVectorNumElements(); i != e;++i){
+-      ConstantInt *Cond = dyn_cast<ConstantInt>(CondV->getOperand(i));
+-      if (Cond == 0) break;
+-      
+-      Constant *V = Cond->isNullValue() ? V2 : V1;
+-      Constant *Res = ConstantExpr::getExtractElement(V, ConstantInt::get(Ty, i));
+-      Result.push_back(Res);
++      Constant *V;
++      Constant *V1Element = ConstantExpr::getExtractElement(V1,
++                                                    ConstantInt::get(Ty, i));
++      Constant *V2Element = ConstantExpr::getExtractElement(V2,
++                                                    ConstantInt::get(Ty, i));
++      Constant *Cond = dyn_cast<Constant>(CondV->getOperand(i));
++      if (V1Element == V2Element) {
++        V = V1Element;
++      }
++      else if (isa<UndefValue>(Cond)) {
++        V = isa<UndefValue>(V1Element) ? V1Element : V2Element;
++      }
++      else {
++        if (!isa<ConstantInt>(Cond)) break;
++        V = Cond->isNullValue() ? V2Element : V1Element;
++      }
++      Result.push_back(V);
+     }
+     
+     // If we were able to build the vector, return it.