Add the IR attribute 'sspstrong'.

SSPStrong applies a heuristic to insert stack protectors in these situations:

* A Protector is required for functions which contain an array, regardless of
  type or length.

* A Protector is required for functions which contain a structure/union which
  contains an array, regardless of type or length.  Note, there is no limit to
  the depth of nesting.

* A protector is required when the address of a local variable (i.e., stack
  based variable) is exposed. (E.g., such as through a local whose address is
  taken as part of the RHS of an assignment or a local whose address is taken as
  part of a function argument.)

This patch implements the SSPString attribute to be equivalent to
SSPRequired. This will change in a subsequent patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173230 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 5 deletions

diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index fea5ec8..0eb6023 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -956,6 +956,7 @@ bool LLParser::ParseOptionalFuncAttrs(AttrBuilder &B) {
     case lltok::kw_returns_twice:   B.addAttribute(Attribute::ReturnsTwice); break;
     case lltok::kw_ssp:             B.addAttribute(Attribute::StackProtect); break;
     case lltok::kw_sspreq:          B.addAttribute(Attribute::StackProtectReq); break;
+    case lltok::kw_sspstrong:       B.addAttribute(Attribute::StackProtectStrong); break;
     case lltok::kw_uwtable:         B.addAttribute(Attribute::UWTable); break;
     case lltok::kw_noduplicate:     B.addAttribute(Attribute::NoDuplicate); break;
 
@@ -1050,11 +1051,11 @@ bool LLParser::ParseOptionalReturnAttrs(AttrBuilder &B) {
     case lltok::kw_readonly:       case lltok::kw_inlinehint:
     case lltok::kw_alwaysinline:   case lltok::kw_optsize:
     case lltok::kw_ssp:            case lltok::kw_sspreq:
-    case lltok::kw_noredzone:      case lltok::kw_noimplicitfloat:
-    case lltok::kw_naked:          case lltok::kw_nonlazybind:
-    case lltok::kw_address_safety: case lltok::kw_minsize:
-    case lltok::kw_alignstack:     case lltok::kw_align:
-    case lltok::kw_noduplicate:
+    case lltok::kw_sspstrong:      case lltok::kw_noimplicitfloat:
+    case lltok::kw_noredzone:      case lltok::kw_naked:
+    case lltok::kw_nonlazybind:    case lltok::kw_address_safety:
+    case lltok::kw_minsize:        case lltok::kw_alignstack:
+    case lltok::kw_align:          case lltok::kw_noduplicate:
       HaveError |= Error(Lex.getLoc(), "invalid use of function-only attribute");
       break;
     }