From a966af2f4cf77c4b8107fb0e93bb97a78f99f5dc Mon Sep 17 00:00:00 2001
From: Nate Begeman <natebegeman@mac.com>
Date: Fri, 13 Aug 2010 00:16:46 +0000
Subject: [PATCH] Move some code from Verifier into SVI::isValidOperands.  This
 allows us to catch bad shufflevector operations when they are created, rather
 than waiting for someone to notice later on.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110986 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/VMCore/Instructions.cpp | 19 +++++++++++++++++--
 lib/VMCore/Verifier.cpp     | 21 ---------------------
 2 files changed, 17 insertions(+), 23 deletions(-)

diff --git a/lib/VMCore/Instructions.cpp b/lib/VMCore/Instructions.cpp
index 9e5fd239233..401802ed13d 100644
--- a/lib/VMCore/Instructions.cpp
+++ b/lib/VMCore/Instructions.cpp
@@ -1430,9 +1430,24 @@ bool ShuffleVectorInst::isValidOperands(const Value *V1, const Value *V2,
     return false;
   
   const VectorType *MaskTy = dyn_cast<VectorType>(Mask->getType());
-  if (!isa<Constant>(Mask) || MaskTy == 0 ||
-      !MaskTy->getElementType()->isIntegerTy(32))
+  if (MaskTy == 0 || !MaskTy->getElementType()->isIntegerTy(32))
     return false;
+
+  // Check to see if Mask is valid.
+  if (const ConstantVector *MV = dyn_cast<ConstantVector>(Mask)) {
+    const VectorType *VTy = cast<VectorType>(V1->getType());
+    for (unsigned i = 0, e = MV->getNumOperands(); i != e; ++i) {
+      if (ConstantInt* CI = dyn_cast<ConstantInt>(MV->getOperand(i))) {
+        if (CI->uge(VTy->getNumElements()*2))
+          return false;
+      } else if (!isa<UndefValue>(MV->getOperand(i))) {
+        return false;
+      }
+    }
+  }
+  else if (!isa<UndefValue>(Mask) && !isa<ConstantAggregateZero>(Mask))
+    return false;
+  
   return true;
 }
 
diff --git a/lib/VMCore/Verifier.cpp b/lib/VMCore/Verifier.cpp
index fe4e674532f..8ff15514243 100644
--- a/lib/VMCore/Verifier.cpp
+++ b/lib/VMCore/Verifier.cpp
@@ -1322,27 +1322,6 @@ void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
   Assert1(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
                                              SV.getOperand(2)),
           "Invalid shufflevector operands!", &SV);
-
-  const VectorType *VTy = dyn_cast<VectorType>(SV.getOperand(0)->getType());
-  Assert1(VTy, "Operands are not a vector type", &SV);
-
-  // Check to see if Mask is valid.
-  if (const ConstantVector *MV = dyn_cast<ConstantVector>(SV.getOperand(2))) {
-    for (unsigned i = 0, e = MV->getNumOperands(); i != e; ++i) {
-      if (ConstantInt* CI = dyn_cast<ConstantInt>(MV->getOperand(i))) {
-        Assert1(!CI->uge(VTy->getNumElements()*2),
-                "Invalid shufflevector shuffle mask!", &SV);
-      } else {
-        Assert1(isa<UndefValue>(MV->getOperand(i)),
-                "Invalid shufflevector shuffle mask!", &SV);
-      }
-    }
-  } else {
-    Assert1(isa<UndefValue>(SV.getOperand(2)) || 
-            isa<ConstantAggregateZero>(SV.getOperand(2)),
-            "Invalid shufflevector shuffle mask!", &SV);
-  }
-
   visitInstruction(SV);
 }
 
-- 
2.34.1