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A better way to handle this is to a td pattern to match "add n, -c" to a subtraction. I believe several targets do something similar to this. Evan On May 16, 2013, at 7:12 AM, Tom Stellard <tom at stellard.net> wrote: > On Thu, May 16, 2013 at 02:03:14AM +0000, Martin Filteau wrote: >> Hi all, >> >> It's the first LLVM backend we do for our asynchronous

On Feb 17, 2011, at 10:35 PM, Вадим Марковцев wrote: > Hello everyone, > > I've added the "S" suffixed versions of ARM and Thumb2 instructions to tablegen. Those are, for example, "movs" or "muls". > Of course, some instructions have already had their twins, such as add/adds, and I leaved them untouched. Adding separate "s" instructions is

Hello everyone, I've added the "S" suffixed versions of ARM and Thumb2 instructions to tablegen. Those are, for example, "movs" or "muls". Of course, some instructions have already had their twins, such as add/adds, and I leaved them untouched. Besides, I propose the codegen optimization based on them, which removes the redundant comparison in patterns like orr