DebugInfo: change alignment type from uint64_t to uint32_t to save space.

In futher patches we shall have alignment field added to DIVariable family
and switching from uint64_t to uint32_t will save 4 bytes per variable.

Differential Revision: https://reviews.llvm.org/D25620

llvm-svn: 284482

1 files changed, 3 insertions, 1 deletions

diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index df9ab1c496c..09118ea4c3a 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -2497,7 +2497,9 @@ std::error_code BitcodeReader::parseMetadata(bool ModuleLevel) {
       Metadata *Scope = getDITypeRefOrNull(Record[5]);
       Metadata *BaseType = getDITypeRefOrNull(Record[6]);
       uint64_t SizeInBits = Record[7];
-      uint64_t AlignInBits = Record[8];
+      if (Record[8] > (uint64_t)std::numeric_limits<uint32_t>::max())
+        return error("Alignment value is too large");
+      uint32_t AlignInBits = Record[8];
       uint64_t OffsetInBits = Record[9];
       DINode::DIFlags Flags = static_cast<DINode::DIFlags>(Record[10]);
       Metadata *Elements = getMDOrNull(Record[11]);