search for: gunvor

...just look for a pointer type plus an integer type followed by a dereference? That would catch both a[n] and *(a+n). Gry On Tue, Apr 7, 2015 at 10:46 PM, Bruce Hoult <bruce at hoult.org> wrote: > Far too late. That would need to be in Clang. > > On Wed, Apr 8, 2015 at 5:36 PM, Gry Gunvor <gry.gunvor at gmail.com> wrote: >> >> Normally for int n unknown at static time, "a[n]" and "*(a+n)" results >> in an add and then a dereference. I want instead for it to compile to >> a system call that takes two arguments, a and n. Where should...

I tried half a gig and that didn't work. I just want to know before I go buy a new machine. Gry

Normally for int n unknown at static time, "a[n]" and "*(a+n)" results in an add and then a dereference. I want instead for it to compile to a system call that takes two arguments, a and n. Where should I intercept this in LLVM? Gry

On Thu, Apr 9, 2015 at 10:47 AM, Jonathan Roelofs <jonathan at codesourcery.com> wrote: >> Again, I asked the LLVM list if, since LLVM is a typed assembly >> language, if I could just look for pointer plus offset followed by a >> dereference. They seemed to suggest that looking for that idiom would > JFTR, we're one big community, and it's not as segregated

I'm just getting started changing the emitted code. Suppose I want to just add one new instruction to the function prologue at the top. Where would I do this? Does it depend on the backend? I'm targeting RISCV64. Gry