Code Flow for RTL generation

Andrew Haley aph@redhat.com
Thu Jun 15 13:03:00 GMT 2006


[ Redirected to gcc-help@.  This tutorial-level exchange isn't
appropriate for gcc@. ]

Please don't top-post.

kernel coder writes:
 > is there any way in gdb to step backward.

No, there isn't.  If you want to know where the routines were called
from go up.

Andrew.

 > On 6/15/06, Andrew Haley <aph@redhat.com> wrote:
 > > kernel coder writes:
 > >  > hi,
 > >  >     I'm trying to figure out the code flow of gcc.But i'm not been
 > >  > able to locate the location at which an expression is compared with
 > >  > pattern given in XXXX.md file.
 > >  >
 > >  > I think XXXX.md file is resposible fo generation of emit-insn.c
 > >  > file.But again at which point the functions in  emit-insn.c file are
 > >  > called for generation of RTL file.
 > >  >
 > >  > Please tell me where in code the pattern matching is done for RTL
 > >  > generation.
 > >
 > > Run cc1 in gdb.  Put a breakpoint on make_insn_raw.  Go up from that
 > > point to find the caller.  You'll find that GEN_foo routines are
 > > called from a number of places, in particular the expander.



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