How are fast-math flags added int the LLVM C++ API during code generation?





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I have a builder that builds an operaion:



return BuilderBinop.CreateFMul(L, R, "multmp");


This generates



%multmp23 = fmul float %d22, %e21


Now I want to add fast-math flags to this. Specifically, I want to add the fast flag. How do I go about doing this?






c++ llvm llvm-c++-api







share|improve this question































    0















    I have a builder that builds an operaion:



    return BuilderBinop.CreateFMul(L, R, "multmp");


    This generates



    %multmp23 = fmul float %d22, %e21


    Now I want to add fast-math flags to this. Specifically, I want to add the fast flag. How do I go about doing this?






    c++ llvm llvm-c++-api







    share|improve this question



























      0












      0








      0








      I have a builder that builds an operaion:



      return BuilderBinop.CreateFMul(L, R, "multmp");


      This generates



      %multmp23 = fmul float %d22, %e21


      Now I want to add fast-math flags to this. Specifically, I want to add the fast flag. How do I go about doing this?






      c++ llvm llvm-c++-api







      share|improve this question
















      I have a builder that builds an operaion:



      return BuilderBinop.CreateFMul(L, R, "multmp");


      This generates



      %multmp23 = fmul float %d22, %e21


      Now I want to add fast-math flags to this. Specifically, I want to add the fast flag. How do I go about doing this?






      c++ llvm llvm-c++-api




      c++ llvm llvm-c++-api






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 25 '18 at 5:59







      vc669

















      asked Nov 25 '18 at 5:12









      vc669vc669

      331211




      331211
























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          FastMathFlags fmf;
          
fmf.setFast(true);
          
BuilderBinop.setFastMathFlags(fmf);


          The FastMathFlags class has helper methods to set flags. Since the interest here is to set the fast flag to true, the .setFast() comes in handy.



          To clear the flags, the .clear() can be used.






          share|improve this answer
























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            FastMathFlags fmf;
            
fmf.setFast(true);
            
BuilderBinop.setFastMathFlags(fmf);


            The FastMathFlags class has helper methods to set flags. Since the interest here is to set the fast flag to true, the .setFast() comes in handy.



            To clear the flags, the .clear() can be used.






            share|improve this answer




























              0














              FastMathFlags fmf;
              
fmf.setFast(true);
              
BuilderBinop.setFastMathFlags(fmf);


              The FastMathFlags class has helper methods to set flags. Since the interest here is to set the fast flag to true, the .setFast() comes in handy.



              To clear the flags, the .clear() can be used.






              share|improve this answer


























                0












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                0







                FastMathFlags fmf;
                
fmf.setFast(true);
                
BuilderBinop.setFastMathFlags(fmf);


                The FastMathFlags class has helper methods to set flags. Since the interest here is to set the fast flag to true, the .setFast() comes in handy.



                To clear the flags, the .clear() can be used.






                share|improve this answer













                FastMathFlags fmf;
                
fmf.setFast(true);
                
BuilderBinop.setFastMathFlags(fmf);


                The FastMathFlags class has helper methods to set flags. Since the interest here is to set the fast flag to true, the .setFast() comes in handy.



                To clear the flags, the .clear() can be used.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 25 '18 at 6:57









                vc669vc669

                331211




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