Re: [PATCH GCC]Improve overflow in scev by using information computed in loop niter, part II

On Mon, Jun 1, 2015 at 6:41 PM, Richard Biener wrote: > On Tue, May 26, 2015 at 1:13 PM, Bin.Cheng wrote: >> Hi, >> The first part patch improving how we handle overflow in scev is >> posted at https://gcc.gnu.org/ml/gcc-patches/2015-05/msg01795.html . >> Here comes the second part patch. >> >> T

Re: [PATCH GCC]Improve overflow in scev by using information computed in loop niter, part II

On Tue, May 26, 2015 at 1:13 PM, Bin.Cheng wrote: > Hi, > The first part patch improving how we handle overflow in scev is > posted at https://gcc.gnu.org/ml/gcc-patches/2015-05/msg01795.html . > Here comes the second part patch. > > This patch does below improvements: > 1) Computes and records

[PATCH GCC]Improve overflow in scev by using information computed in loop niter, part II

Hi, The first part patch improving how we handle overflow in scev is posted at https://gcc.gnu.org/ml/gcc-patches/2015-05/msg01795.html . Here comes the second part patch. This patch does below improvements: 1) Computes and records control iv for each loop's exit edge. This provides a way to co