Add support for hashing attributes with DW_FORM_block. This required

passing down an AsmPrinter instance so we could compute the size of
the block which could be target specific. All of the test cases in
the unittest don't have any target specific data so we can use a NULL
AsmPrinter there. This also depends upon block data being added as
integers.

We can now hash the entire fission-cu.ll compile unit so turn the
flag on there with the hash value.

llvm-svn: 201752

1 files changed, 55 insertions, 0 deletions

diff --git a/llvm/unittests/CodeGen/DIEHashTest.cpp b/llvm/unittests/CodeGen/DIEHashTest.cpp
index e613181996c..c874cef9240 100644
--- a/llvm/unittests/CodeGen/DIEHashTest.cpp
+++ b/llvm/unittests/CodeGen/DIEHashTest.cpp
@@ -594,4 +594,59 @@ TEST(DIEHashTest, MemberSdata) {
   uint64_t MD5Res = DIEHash().computeTypeSignature(A);
   ASSERT_EQ(0x9a216000dd3788a7ULL, MD5Res);
 }
+
+// Derived from:
+// struct A {
+//   const static float PI = 3.14;
+// };
+// A a;
+TEST(DIEHashTest, MemberBlock) {
+  DIE A(dwarf::DW_TAG_structure_type);
+  DIEInteger One(1);
+  DIEString AStr(&One, "A");
+  A.addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &AStr);
+  A.addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &One);
+  A.addValue(dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, &One);
+  A.addValue(dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, &One);
+
+  DIEInteger Four(4);
+  DIEString FStr(&One, "float");
+  DIE *FloatTyDIE = new DIE(dwarf::DW_TAG_base_type);
+  FloatTyDIE->addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, &Four);
+  FloatTyDIE->addValue(dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, &Four);
+  FloatTyDIE->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &FStr);
+
+  DIEEntry FloatTy(FloatTyDIE);
+  DIE *PITyDIE = new DIE(dwarf::DW_TAG_const_type);
+  PITyDIE->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &FloatTy);
+
+  DIEEntry PITy(PITyDIE);
+  DIE *PI = new DIE(dwarf::DW_TAG_member);
+  DIEString PIStr(&One, "PI");
+  DIEInteger Two(2);
+  PI->addValue(dwarf::DW_AT_name, dwarf::DW_FORM_strp, &PIStr);
+  PI->addValue(dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, &One);
+  PI->addValue(dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, &Two);
+  PI->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, &PITy);
+  PI->addValue(dwarf::DW_AT_external, dwarf::DW_FORM_flag_present, &One);
+  PI->addValue(dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present, &One);
+
+  DIEBlock *PIBlock = new DIEBlock();
+  DIEInteger Blk1(0xc3);
+  DIEInteger Blk2(0xf5);
+  DIEInteger Blk3(0x48);
+  DIEInteger Blk4(0x40);
+
+  PIBlock->addValue((dwarf::Attribute)0, dwarf::DW_FORM_data1, &Blk1);
+  PIBlock->addValue((dwarf::Attribute)0, dwarf::DW_FORM_data1, &Blk2);
+  PIBlock->addValue((dwarf::Attribute)0, dwarf::DW_FORM_data1, &Blk3);
+  PIBlock->addValue((dwarf::Attribute)0, dwarf::DW_FORM_data1, &Blk4);
+
+  PI->addValue(dwarf::DW_AT_const_value, dwarf::DW_FORM_block1, PIBlock);
+
+  A.addChild(PI);
+
+  uint64_t MD5Res = DIEHash().computeTypeSignature(A);
+  ASSERT_EQ(0x493af53ad3d3f651ULL, MD5Res);
+}
 }