From ac6e5c10db6f3b587c1fe8b2299ee9f7816a8519 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 5 Nov 2005 21:54:03 +0000
Subject: [PATCH] Verify that alignment amounts are a power of 2

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24198 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AsmParser/llvmAsmParser.y | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/AsmParser/llvmAsmParser.y b/lib/AsmParser/llvmAsmParser.y
index c5589782937..6bfc3bb8e83 100644
--- a/lib/AsmParser/llvmAsmParser.y
+++ b/lib/AsmParser/llvmAsmParser.y
@@ -2209,6 +2209,9 @@ MemoryInst : MALLOC Types {
     delete $2;
   }
   | MALLOC Types ',' ALIGN EUINT64VAL {
+    if ($5 & ($5-1))
+      ThrowException("Alignment amount '" + utostr($5) +
+                     "' is not a power of 2!");
     $$ = new MallocInst(*$2, 0, $5);
     delete $2;
   }
@@ -2217,6 +2220,9 @@ MemoryInst : MALLOC Types {
     delete $2;
   }
   | MALLOC Types ',' UINT ValueRef ',' ALIGN EUINT64VAL {
+    if ($8 & ($8-1))
+      ThrowException("Alignment amount '" + utostr($8) +
+                     "' is not a power of 2!");
     $$ = new MallocInst(*$2, getVal($4, $5), $8);
     delete $2;
   }
@@ -2225,6 +2231,9 @@ MemoryInst : MALLOC Types {
     delete $2;
   }
   | ALLOCA Types ',' ALIGN EUINT64VAL {
+    if ($5 & ($5-1))
+      ThrowException("Alignment amount '" + utostr($5) +
+                     "' is not a power of 2!");
     $$ = new AllocaInst(*$2, 0, $5);
     delete $2;
   }
@@ -2233,6 +2242,9 @@ MemoryInst : MALLOC Types {
     delete $2;
   }
   | ALLOCA Types ',' UINT ValueRef ',' ALIGN EUINT64VAL {
+    if ($8 & ($8-1))
+      ThrowException("Alignment amount '" + utostr($8) +
+                     "' is not a power of 2!");
     $$ = new AllocaInst(*$2, getVal($4, $5), $8);
     delete $2;
   }