From: Chris Lattner <sabre@nondot.org>
Date: Sat, 5 Nov 2005 21:57:54 +0000 (+0000)
Subject: verify that alignments are always a power of 2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6033716140c18887174d3371ef7c9a840e001a24;p=oota-llvm.git

verify that alignments are always a power of 2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24200 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/VMCore/Instructions.cpp b/lib/VMCore/Instructions.cpp
index 96a010b2f77..48f3ed0e5f3 100644
--- a/lib/VMCore/Instructions.cpp
+++ b/lib/VMCore/Instructions.cpp
@@ -498,6 +498,7 @@ AllocationInst::AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy,
                                Instruction *InsertBefore)
   : UnaryInstruction(PointerType::get(Ty), iTy, getAISize(ArraySize),
                      Name, InsertBefore), Alignment(Align) {
+  assert((Align & (Align-1)) == 0 && "Alignment is not a power of 2!");
   assert(Ty != Type::VoidTy && "Cannot allocate void!");
 }
 
@@ -506,6 +507,7 @@ AllocationInst::AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy,
                                BasicBlock *InsertAtEnd)
   : UnaryInstruction(PointerType::get(Ty), iTy, getAISize(ArraySize),
                      Name, InsertAtEnd), Alignment(Align) {
+  assert((Align & (Align-1)) == 0 && "Alignment is not a power of 2!");
   assert(Ty != Type::VoidTy && "Cannot allocate void!");
 }