Hi, Thanks a lot for replying. I have tried tracing the print_rtl_single too following the REG_EXPR but it ends up in the code of printing the complete tree. Is it possible to access this information directly, ie get the variable name stored in a string instead of printing it out? I am not too familiar with the code for the tree and it would be very helpful to me if I could get the method to get the variable name stored/extracted from the tree. Thanks in advance. Eashan On Wed, May 6, 2020 at 4:36 AM Jeff Law <law@xxxxxxxxxx> wrote: > On Wed, 2020-05-06 at 04:27 +0530, eashan gupta via Gcc-help wrote: > > Hi, > > Is it possible to access the variable name if we have an RTX which is a > reg > > that corresponds to a variable declared by the user? > > > > I have found the macro REG_USERVAR_P (RTX) in rtl.h which returns the > > boolean "1 if RTX is a reg that corresponds to a variable declared by the > > user." But I am unable to get a suitable macro to get the variable name > the > > reg corresponds to. > > > > On dumping the rtl output using the command: > > > > print_rtl_single(stdout, in_rtx); > > > > I get output: > > > > (reg/v:SI 68 [ c ]) > > > > where "c" was the variable name defined by me. How do I access "c" given > > the rtx statement, "in_rtx"? > If/when this information is available it would be in the REG_EXPR field > which > would point back to the tree declaration. > > jeff > >
