LCOV - code coverage report
Current view: top level - include/llvm/Analysis - EHPersonalities.h (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 5 5 100.0 %
Date: 2017-09-14 15:23:50 Functions: 0 0 -
Legend: Lines: hit not hit

          Line data    Source code
       1             : //===- EHPersonalities.h - Compute EH-related information -----------------===//
       2             : //
       3             : //                     The LLVM Compiler Infrastructure
       4             : //
       5             : // This file is distributed under the University of Illinois Open Source
       6             : // License. See LICENSE.TXT for details.
       7             : //
       8             : //===----------------------------------------------------------------------===//
       9             : 
      10             : #ifndef LLVM_ANALYSIS_EHPERSONALITIES_H
      11             : #define LLVM_ANALYSIS_EHPERSONALITIES_H
      12             : 
      13             : #include "llvm/ADT/DenseMap.h"
      14             : #include "llvm/ADT/TinyPtrVector.h"
      15             : #include "llvm/ADT/Triple.h"
      16             : #include "llvm/Support/ErrorHandling.h"
      17             : 
      18             : namespace llvm {
      19             : class BasicBlock;
      20             : class Function;
      21             : class Value;
      22             : 
      23             : enum class EHPersonality {
      24             :   Unknown,
      25             :   GNU_Ada,
      26             :   GNU_C,
      27             :   GNU_C_SjLj,
      28             :   GNU_CXX,
      29             :   GNU_CXX_SjLj,
      30             :   GNU_ObjC,
      31             :   MSVC_X86SEH,
      32             :   MSVC_Win64SEH,
      33             :   MSVC_CXX,
      34             :   CoreCLR,
      35             :   Rust
      36             : };
      37             : 
      38             : /// \brief See if the given exception handling personality function is one
      39             : /// that we understand.  If so, return a description of it; otherwise return
      40             : /// Unknown.
      41             : EHPersonality classifyEHPersonality(const Value *Pers);
      42             : 
      43             : StringRef getEHPersonalityName(EHPersonality Pers);
      44             : 
      45             : EHPersonality getDefaultEHPersonality(const Triple &T);
      46             : 
      47             : /// \brief Returns true if this personality function catches asynchronous
      48             : /// exceptions.
      49             : inline bool isAsynchronousEHPersonality(EHPersonality Pers) {
      50             :   // The two SEH personality functions can catch asynch exceptions. We assume
      51             :   // unknown personalities don't catch asynch exceptions.
      52        7866 :   switch (Pers) {
      53             :   case EHPersonality::MSVC_X86SEH:
      54             :   case EHPersonality::MSVC_Win64SEH:
      55             :     return true;
      56        6941 :   default:
      57             :     return false;
      58             :   }
      59             :   llvm_unreachable("invalid enum");
      60             : }
      61             : 
      62             : /// \brief Returns true if this is a personality function that invokes
      63             : /// handler funclets (which must return to it).
      64             : inline bool isFuncletEHPersonality(EHPersonality Pers) {
      65      489561 :   switch (Pers) {
      66             :   case EHPersonality::MSVC_CXX:
      67             :   case EHPersonality::MSVC_X86SEH:
      68             :   case EHPersonality::MSVC_Win64SEH:
      69             :   case EHPersonality::CoreCLR:
      70             :     return true;
      71             :   default:
      72             :     return false;
      73             :   }
      74             :   llvm_unreachable("invalid enum");
      75             : }
      76             : 
      77             : /// \brief Return true if this personality may be safely removed if there
      78             : /// are no invoke instructions remaining in the current function.
      79             : inline bool isNoOpWithoutInvoke(EHPersonality Pers) {
      80        2944 :   switch (Pers) {
      81             :   case EHPersonality::Unknown:
      82             :     return false;
      83             :   // All known personalities currently have this behavior
      84          34 :   default:
      85             :     return true;
      86             :   }
      87             :   llvm_unreachable("invalid enum");
      88             : }
      89             : 
      90             : bool canSimplifyInvokeNoUnwind(const Function *F);
      91             : 
      92             : typedef TinyPtrVector<BasicBlock *> ColorVector;
      93             : 
      94             : /// \brief If an EH funclet personality is in use (see isFuncletEHPersonality),
      95             : /// this will recompute which blocks are in which funclet. It is possible that
      96             : /// some blocks are in multiple funclets. Consider this analysis to be
      97             : /// expensive.
      98             : DenseMap<BasicBlock *, ColorVector> colorEHFunclets(Function &F);
      99             : 
     100             : } // end namespace llvm
     101             : 
     102             : #endif

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