[cfe-dev] Pass -fopenmp=libiomp5 flag to Libtooling front-end in clang3.6

[xiaohui chen]

mytool openmp.c  -- -Xclang -fopenmp=libiomp5

-OMPTaskDirective 0x3bb8e98 <line:6:9, col:17>
      `-CapturedStmt 0x3bb8c70 <line:7:1, line:11:1>
        |-Capture byref Var 0x3b77640 'k' 'char'
        |-Capture byref Var 0x3b77530 'd' 'int'
        |-CapturedDecl 0x3bb8900 <<invalid sloc>> <invalid sloc>
        | `-ImplicitParamDecl 0x3bb8990 <line:6:9> col:9 implicit __context
'struct (anonymous at /home/metafork/test/openmp.c:6:9) *'
        |-CompoundStmt 0x3bb8c48 <line:7:1, line:11:1>
        | |-BinaryOperator 0x3bb8af8 <line:8:1, col:3> 'char' '='
        | | |-DeclRefExpr 0x3bb8a18 <col:1> 'char' lvalue Var 0x3b77640 'k'
'char'
        | | `-ImplicitCastExpr 0x3bb8ae0 <col:3> 'char' <IntegralCast>
        | |   `-IntegerLiteral 0x3bb8ac0 <col:3> 'int' 0
        | `-BinaryOperator 0x3bb8c20 <line:9:1, col:3> 'int' '='
        |   |-DeclRefExpr 0x3bb8b48 <col:1> 'int' lvalue Var 0x3b77530 'd'
'int'
        |   `-IntegerLiteral 0x3bb8c00 <col:3> 'int' 0
        |-DeclRefExpr 0x3bb8a98 <line:8:1> 'char' lvalue Var 0x3b77640 'k'
'char'
        `-DeclRefExpr 0x3bb8bd8 <line:9:1> 'int' lvalue Var 0x3b77530 'd'
'int'


On Tue, Jan 13, 2015 at 5:28 PM, xiaohui chen <xchen198812 at gmail.com> wrote:

> this commands works:
> mytool openmp.c  -- -Xclang -fopenmp=libiomp5
>
> On Tue, Jan 13, 2015 at 3:55 PM, xiaohui chen <xchen198812 at gmail.com>
> wrote:
>
>> hi there:
>>
>> My Clang  version is 3.6.
>>
>> i can use the following command to dump my OpenMP code:
>>
>> clang -cc1 -ast-dump openmp.c -fopenmp=libiomp5
>>
>> it works well(PS: I add dump support roughly) :
>>
>> OMPTaskDirective 0x8c3caa8 <line:6:9, col:17>
>>       `-CapturedStmt 0x8c3c880 <line:7:1, line:11:1>
>>         |-Capture byref Var 0x8bfb280 'k' 'char'
>>         |-Capture byref Var 0x8bfb170 'd' 'int'
>>         |-CapturedDecl 0x8c3c510 <<invalid sloc>> <invalid sloc>
>>         | `-ImplicitParamDecl 0x8c3c5a0 <line:6:9> col:9 implicit
>> __context 'struct (anonymous at openmp.c:6:9) *'
>>         |-CompoundStmt 0x8c3c858 <line:7:1, line:11:1>
>>         | |-BinaryOperator 0x8c3c708 <line:8:1, col:3> 'char' '='
>>         | | |-DeclRefExpr 0x8c3c628 <col:1> 'char' lvalue Var 0x8bfb280
>> 'k' 'char'
>>         | | `-ImplicitCastExpr 0x8c3c6f0 <col:3> 'char' <IntegralCast>
>>         | |   `-IntegerLiteral 0x8c3c6d0 <col:3> 'int' 0
>>         | `-BinaryOperator 0x8c3c830 <line:9:1, col:3> 'int' '='
>>         |   |-DeclRefExpr 0x8c3c758 <col:1> 'int' lvalue Var 0x8bfb170
>> 'd' 'int'
>>         |   `-IntegerLiteral 0x8c3c810 <col:3> 'int' 0
>>         |-DeclRefExpr 0x8c3c6a8 <line:8:1> 'char' lvalue Var 0x8bfb280
>> 'k' 'char'
>>         `-DeclRefExpr 0x8c3c7e8 <line:9:1> 'int' lvalue Var 0x8bfb170 'd'
>> 'int'
>>
>> i wrote a source-to-source tool using Libtooling, and i want to pass
>> -fopenmp=libiomp5 flag to the tool in this way:
>>
>> mytool openmp.c  --  -fopenmp=libiomp5
>>
>> it does not work, -fopenmp=libiomp5 is not received by the front-end, see
>> the output:
>>
>> warning: argument unused during compilation: '-fopenmp=libiomp5'
>> `-CompoundStmt 0x33d69b8 <line:7:1, line:11:1>
>>       |-BinaryOperator 0x33957d8 <line:8:1, col:3> 'char' '='
>>       | |-DeclRefExpr 0x3395778 <col:1> 'char' lvalue Var 0x33956f0 'k'
>> 'char'
>>       | `-ImplicitCastExpr 0x33957c0 <col:3> 'char' <IntegralCast>
>>       |   `-IntegerLiteral 0x33957a0 <col:3> 'int' 0
>>       `-BinaryOperator 0x33d6990 <line:9:1, col:3> 'int' '='
>>         |-DeclRefExpr 0x3395800 <col:1> 'int' lvalue Var 0x33955e0 'd'
>> 'int'
>>         `-IntegerLiteral 0x33d6970 <col:3> 'int' 0
>>
>> , what is the right way to pass fopenmp=libiomp5 to the frontend?
>>
>
>
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