diff options
author | Piotr Padlewski <prazek@google.com> | 2015-08-27 21:35:37 +0000 |
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committer | Piotr Padlewski <prazek@google.com> | 2015-08-27 21:35:37 +0000 |
commit | b50aff8739667e100bca22d3a62bcaba9709ec48 (patch) | |
tree | 31b493135b5d3674a52c4672d489d687e4554447 /lib/CodeGen/CGCXXABI.h | |
parent | 1e499fe4f34cb20f84d7229cfea4c10f190c5bba (diff) | |
download | clang-b50aff8739667e100bca22d3a62bcaba9709ec48.tar.gz |
Generating assumption loads of vptr after ctor call (fixed)
Generating call assume(icmp %vtable, %global_vtable) after constructor
call for devirtualization purposes.
For more info go to:
http://lists.llvm.org/pipermail/cfe-dev/2015-July/044227.html
Edit:
Fixed version because of PR24479.
http://reviews.llvm.org/D11859
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@246213 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/CGCXXABI.h')
-rw-r--r-- | lib/CodeGen/CGCXXABI.h | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/lib/CodeGen/CGCXXABI.h b/lib/CodeGen/CGCXXABI.h index 5ef409ecde..158d29ab51 100644 --- a/lib/CodeGen/CGCXXABI.h +++ b/lib/CodeGen/CGCXXABI.h @@ -346,13 +346,25 @@ public: virtual void emitVTableDefinitions(CodeGenVTables &CGVT, const CXXRecordDecl *RD) = 0; + /// Checks if ABI requires extra virtual offset for vtable field. + virtual bool + isVirtualOffsetNeededForVTableField(CodeGenFunction &CGF, + CodeGenFunction::VPtr Vptr) = 0; + + /// Checks if ABI requires to initilize vptrs for given dynamic class. + virtual bool doStructorsInitializeVPtrs(const CXXRecordDecl *VTableClass) = 0; + + /// Get the address point of the vtable for the given base subobject. + virtual llvm::Constant * + getVTableAddressPoint(BaseSubobject Base, + const CXXRecordDecl *VTableClass) = 0; + /// Get the address point of the vtable for the given base subobject while - /// building a constructor or a destructor. On return, NeedsVirtualOffset - /// tells if a virtual base adjustment is needed in order to get the offset - /// of the base subobject. - virtual llvm::Value *getVTableAddressPointInStructor( - CodeGenFunction &CGF, const CXXRecordDecl *RD, BaseSubobject Base, - const CXXRecordDecl *NearestVBase, bool &NeedsVirtualOffset) = 0; + /// building a constructor or a destructor. + virtual llvm::Value * + getVTableAddressPointInStructor(CodeGenFunction &CGF, const CXXRecordDecl *RD, + BaseSubobject Base, + const CXXRecordDecl *NearestVBase) = 0; /// Get the address point of the vtable for the given base subobject while /// building a constexpr. |