DIEHash: Use DW_FORM_sdata for integers, per spec.
This allows us to produce the same hash as GCC for at least some simple
examples.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192855 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/CodeGen/DIEHashTest.cpp b/unittests/CodeGen/DIEHashTest.cpp
index 91b0322..92b6d76 100644
--- a/unittests/CodeGen/DIEHashTest.cpp
+++ b/unittests/CodeGen/DIEHashTest.cpp
@@ -23,6 +23,22 @@
DIEInteger Size(4);
Die.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Size);
uint64_t MD5Res = Hash.computeTypeSignature(&Die);
- ASSERT_EQ(0x4F68EF1039F8D2BULL, MD5Res);
+ ASSERT_EQ(0x1AFE116E83701108ULL, MD5Res);
+}
+
+TEST(DIEHashTrivialTypeTest, DIEHash) {
+ // A complete, but simple, type containing no members and defined on the first
+ // line of a file.
+ DIE FooType(dwarf::DW_TAG_structure_type);
+ DIEInteger One(1);
+ FooType.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
+
+ // Line and file number are ignored.
+ FooType.addValue(dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, &One);
+ FooType.addValue(dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, &One);
+ uint64_t MD5Res = DIEHash().computeTypeSignature(&FooType);
+
+ // The exact same hash GCC produces for this DIE.
+ ASSERT_EQ(0x715305ce6cfd9ad1ULL, MD5Res);
}
}