From 92af77f45cf673394a7c73f64a58cd6a463ec15f Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 5 Jan 2009 07:46:05 +0000
Subject: [PATCH] PR3281:crash00.ll: produce this diagnostic instead of
 crashing:

@t = global i8 0, align 3
                        ^

llvm-svn: 61675
---
 lib/AsmParser/LLParser.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index e44e65057ca..1f08ca34ff1 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -793,7 +793,11 @@ bool LLParser::ParseOptionalAlignment(unsigned &Alignment) {
   Alignment = 0;
   if (!EatIfPresent(lltok::kw_align))
     return false;
-  return ParseUInt32(Alignment);
+  LocTy AlignLoc = Lex.getLoc();
+  if (ParseUInt32(Alignment)) return true;
+  if (!isPowerOf2_32(Alignment))
+    return Error(AlignLoc, "alignment is not a power of two");
+  return false;
 }
 
 /// ParseOptionalCommaAlignment