From ab9cd3e132a86f99c8784c6025c6f55bb5cf2612 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 19 Jan 2010 06:22:22 +0000
Subject: fix parsing .comm directives on systems which do not represent
 alignments as a power of 2.  This fixes MC/AsmParser/directive_comm.s

llvm-svn: 93867
---
 llvm/tools/llvm-mc/AsmParser.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'llvm/tools/llvm-mc/AsmParser.cpp')

diff --git a/llvm/tools/llvm-mc/AsmParser.cpp b/llvm/tools/llvm-mc/AsmParser.cpp
index d4af4bd0df6..0e7c3443d5a 100644
--- a/llvm/tools/llvm-mc/AsmParser.cpp
+++ b/llvm/tools/llvm-mc/AsmParser.cpp
@@ -1278,6 +1278,13 @@ bool AsmParser::ParseDirectiveComm(bool IsLocal) {
     Pow2AlignmentLoc = Lexer.getLoc();
     if (ParseAbsoluteExpression(Pow2Alignment))
       return true;
+    
+    // If this target takes alignments in bytes (not log) validate and convert.
+    if (Lexer.getMAI().getAlignmentIsInBytes()) {
+      if (!isPowerOf2_64(Pow2Alignment))
+        return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
+      Pow2Alignment = Log2_64(Pow2Alignment);
+    }
   }
   
   if (Lexer.isNot(AsmToken::EndOfStatement))
-- 
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