[cfe-dev] Get name of MemberExpr expression

[Qiufeng Yu via cfe-dev]

Hi Alexey,

As far as checking the base. What's the best way to check if the base is
actually "blockIdx"?

On Thu, Dec 7, 2017 at 6:19 AM, Alexey Knyshev <alexey.knyshev at gmail.com>
wrote:

> You should not check RecordDecl in this manner as soon as it MemberExpr is
> "composite". I mean you should separately check base & memberDecl.
>
> According to docs for MeberExpr::getMemberDecl
> <https://clang.llvm.org/doxygen/classclang_1_1MemberExpr.html#a66dc522ec5732b5e4a1a90bdfe70919f>
> The returned declaration will be a FieldDecl or (in C++) a VarDecl (for
>   /// static data members), a CXXMethodDecl, or an EnumConstantDecl.
>
> 2017-12-07 12:21 GMT+03:00 Qiufeng Yu <qyu4 at ncsu.edu>:
>
>> I can also use the ASTMatcher to find all MemberExprs, but still can't
>> narrow them down to those only called blockIdx.x and blockIdx.y.
>> My Matcher is following:
>>
>> Matcher.addMatcher(memberExpr(hasObjectExpression(hasType(cx
>> xRecordDecl(hasName("blockIdx.x"))))));
>> Matcher.addMatcher(memberExpr(hasObjectExpression(hasType(cx
>> xRecordDecl(hasName("blockIdx.y"))))));
>>
>> On Thu, Dec 7, 2017 at 3:55 AM, Qiufeng Yu <qyu4 at ncsu.edu> wrote:
>>
>>> Say the original code is int bx = blockIdx.x, I already found the
>>> MemberExpr of this line of code, which is blockIdx.x. But all I have is
>>> only this MemberExpr. What I need is the actual string representation of
>>> this MemberExpr so that I can perform the string comparison to make sure
>>> that this MemberExpr is indeed blockIdx.x, and perform the rewriting
>>> process.
>>>
>>> On Thu, Dec 7, 2017 at 3:48 AM, Alexey Knyshev <alexey.knyshev at gmail.com
>>> > wrote:
>>>
>>>> Hi,
>>>> Do you mean finding AST corresponding to MemberExpr or you already
>>>> found then and trying to figure out SourceLocation for them?
>>>>
>>>> Regards, Alexey K
>>>>
>>>> 2017-12-07 11:40 GMT+03:00 Qiufeng Yu via cfe-dev <
>>>> cfe-dev at lists.llvm.org>:
>>>>
>>>>> Hi all,
>>>>>
>>>>> I'm new to clang and currently working on a project where I need to
>>>>> rewrite some codes in CUDA source file.
>>>>>
>>>>> For example, if I have the following CUDA code:
>>>>>
>>>>> int bx = blockIdx.x;
>>>>> int by = blockIdx.y;
>>>>>
>>>>> I want to rewrite the blockIdx and blockIdx.x and blockIdx.y to some
>>>>> other code:
>>>>> int bx = something else;
>>>>> int by = something else;
>>>>>
>>>>> My problem is that how do I find the MemberExpr blockIdx,x and
>>>>> blockIdx.y?
>>>>>
>>>>> I know how to get the MemberExpr, but I have no clue how to extract
>>>>> the name of the MemberExpr in order to know that it is the right MemberExpr
>>>>> for me to rewrite.
>>>>>
>>>>> Any help is appreciated.
>>>>>
>>>>>
>>>>> Patrick
>>>>>
>>>>> _______________________________________________
>>>>> cfe-dev mailing list
>>>>> cfe-dev at lists.llvm.org
>>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
>>>>>
>>>>>
>>>>
>>>>
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>>>>
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>>>> bitbucket.org/alexeyknyshev
>>>>
>>>
>>>
>>
>
>
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