vendor/llvm/llvm-trunk-r238337

1 files changed, 47 insertions, 0 deletions

diff --git a/include/llvm/Analysis/LibCallSemantics.h b/include/llvm/Analysis/LibCallSemantics.h
index 8bd747f03970..34831b2849dd 100644
--- a/include/llvm/Analysis/LibCallSemantics.h
+++ b/include/llvm/Analysis/LibCallSemantics.h
@@ -18,6 +18,7 @@
 #include "llvm/Analysis/AliasAnalysis.h"
 
 namespace llvm {
+class InvokeInst;
 
   /// LibCallLocationInfo - This struct describes a set of memory locations that
   /// are accessed by libcalls.  Identification of a location is doing with a
@@ -162,6 +163,52 @@ namespace llvm {
     virtual const LibCallFunctionInfo *getFunctionInfoArray() const = 0;
   };
 
+  enum class EHPersonality {
+    Unknown,
+    GNU_Ada,
+    GNU_C,
+    GNU_CXX,
+    GNU_ObjC,
+    MSVC_X86SEH,
+    MSVC_Win64SEH,
+    MSVC_CXX,
+  };
+
+  /// \brief See if the given exception handling personality function is one
+  /// that we understand.  If so, return a description of it; otherwise return
+  /// Unknown.
+  EHPersonality classifyEHPersonality(const Value *Pers);
+
+  /// \brief Returns true if this personality function catches asynchronous
+  /// exceptions.
+  inline bool isAsynchronousEHPersonality(EHPersonality Pers) {
+    // The two SEH personality functions can catch asynch exceptions. We assume
+    // unknown personalities don't catch asynch exceptions.
+    switch (Pers) {
+    case EHPersonality::MSVC_X86SEH:
+    case EHPersonality::MSVC_Win64SEH:
+      return true;
+    default: return false;
+    }
+    llvm_unreachable("invalid enum");
+  }
+
+  /// \brief Returns true if this is an MSVC personality function.
+  inline bool isMSVCEHPersonality(EHPersonality Pers) {
+    // The two SEH personality functions can catch asynch exceptions. We assume
+    // unknown personalities don't catch asynch exceptions.
+    switch (Pers) {
+    case EHPersonality::MSVC_CXX:
+    case EHPersonality::MSVC_X86SEH:
+    case EHPersonality::MSVC_Win64SEH:
+      return true;
+    default: return false;
+    }
+    llvm_unreachable("invalid enum");
+  }
+
+  bool canSimplifyInvokeNoUnwind(const InvokeInst *II);
+
 } // end namespace llvm
 
 #endif