IR: Add COMDATs to the IR

This new IR facility allows us to represent the object-file semantic of
a COMDAT group.

COMDATs allow us to tie together sections and make the inclusion of one
dependent on another. This is required to implement features like MS
ABI VFTables and optimizing away certain kinds of initialization in C++.

This functionality is only representable in COFF and ELF, Mach-O has no
similar mechanism.

Differential Revision: http://reviews.llvm.org/D4178

llvm-svn: 211920

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/lib/AsmParser/LLToken.h b/llvm/lib/AsmParser/LLToken.h
index af8b0da78bf..534d82415fd 100644
--- a/llvm/lib/AsmParser/LLToken.h
+++ b/llvm/lib/AsmParser/LLToken.h
@@ -142,6 +142,15 @@ namespace lltok {
     kw_type,
     kw_opaque,
 
+    kw_comdat,
+
+    // Comdat types
+    kw_any,
+    kw_exactmatch,
+    kw_largest,
+    kw_noduplicates,
+    kw_samesize,
+
     kw_eq, kw_ne, kw_slt, kw_sgt, kw_sle, kw_sge, kw_ult, kw_ugt, kw_ule,
     kw_uge, kw_oeq, kw_one, kw_olt, kw_ogt, kw_ole, kw_oge, kw_ord, kw_uno,
     kw_ueq, kw_une,
@@ -180,6 +189,7 @@ namespace lltok {
     // String valued tokens (StrVal).
     LabelStr,          // foo:
     GlobalVar,         // @foo @"foo"
+    ComdatVar,         // $foo
     LocalVar,          // %foo %"foo"
     MetadataVar,       // !foo
     StringConstant,    // "foo"