[cfe-dev] Get name of MemberExpr expression

Qiufeng Yu via cfe-dev cfe-dev at lists.llvm.org
Thu Dec 7 01:21:33 PST 2017


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(cxxRecordDecl(hasName("blockIdx.x"))))));
Matcher.addMatcher(memberExpr(hasObjectExpression(hasType(cxxRecordDecl(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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>>
>> github.com/alexeyknyshev
>> bitbucket.org/alexeyknyshev
>>
>
>
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