DwarfDebug: MD5 is always little endian, bswap on big endian platforms.
This makes LLVM emit the same signature regardless of host and target endianess.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187304 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 0d2d02e..7ba1fc1 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1059,8 +1059,9 @@
Hash.final(Result);
// ... take the least significant 8 bytes and store those as the attribute.
- uint64_t Signature;
- memcpy(&Signature, &Result[8], 8);
+ // Our MD5 implementation always returns its results in little endian, swap
+ // bytes appropriately.
+ uint64_t Signature = *reinterpret_cast<support::ulittle64_t *>(Result + 8);
// FIXME: This should be added onto the type unit, not the type, but this
// works as an intermediate stage.