On Fri, Jul 24, 2009 at 10:34 PM, Tim Crook<tcr...@adobe.com> wrote: > Hello there. > > I am trying to track down a problem with gcc 4.1 which has to do with > inlining and templates on PowerPC. Is there any documentation I can look > related to the output generated with -fdump? I am getting extraneous lwz > (load word and zero extend) instructions inserted when calling various > methods - after $toc (r2) has been switched to the destination method's > global data, just before the method call with the bctrl instruction. This lwz > instruction causes a crash on IBM AIX when 32-bit shared libraries are loaded > non-contiguously in memory. It looks like various code blocks are not being > combined correctly when code is inlined - the extra lwz is being left behind. > > I have figured out that turning off gcse optimizations will stop this > behavior, but doing this causes a performance hit. I would prefer not to > upgrade the compiler at this time. With the compiler dump using -fdump, I am > looking for a better way to work around this problem. > > Tim Crook.
Hmm, how are dumps going to solve your problem? Perhaps you can explain a bit more what you have in mind. Documentation about the dumps is in the target descriptions. It is quite unusual for a user to be interested in what is in them. What is sometimes useful, is -dAP, then look at the assembler output to see the number and pattern of the asm instruction(s) that is (are) causing you trouble. You can then go through the other dumps (-da, which is the same as -fdump-rtl-all) to see where the insn comes from. Ciao! Steven
