Re: [x86 PATCH] Correct ix86_rtx_cost for multi-word multiplication.

2022-05-18 Thread Uros Bizjak via Gcc-patches
On Tue, May 17, 2022 at 6:44 PM Roger Sayle wrote: > > > This is the i386 backend specific piece of my revised patch for > PR middle-end/98865, where Richard Biener has suggested that I perform > the desired transformation during RTL expansion where the backend can > control whether it is profitab

[x86 PATCH] Correct ix86_rtx_cost for multi-word multiplication.

2022-05-17 Thread Roger Sayle
This is the i386 backend specific piece of my revised patch for PR middle-end/98865, where Richard Biener has suggested that I perform the desired transformation during RTL expansion where the backend can control whether it is profitable to convert a multiplication into a bit-wise AND and a negati