Re: [PATCH] Fix iv_number_of_iterations (PR rtl-optimization/55838)

2013-01-03 Thread Zdenek Dvorak
Hi, > When one (or both) IVs have extend_mode wider than mode, but step doesn't > fit into mode (the IV is > (subreg:MODE (plus:EXTEND_MODE base (mult:EXTEND_MODE i step)) lowpart) > ), such as for EXTEND_MODE SImode, MODE QImode and step e.g. 129, 128, 256 > or 517, iv_number_of_iterations can cr

Re: [PATCH] Fix iv_number_of_iterations (PR rtl-optimization/55838)

2013-01-03 Thread Richard Biener
On Thu, 3 Jan 2013, Jakub Jelinek wrote: > Hi! > > When one (or both) IVs have extend_mode wider than mode, but step doesn't > fit into mode (the IV is > (subreg:MODE (plus:EXTEND_MODE base (mult:EXTEND_MODE i step)) lowpart) > ), such as for EXTEND_MODE SImode, MODE QImode and step e.g. 129, 128

[PATCH] Fix iv_number_of_iterations (PR rtl-optimization/55838)

2013-01-03 Thread Jakub Jelinek
Hi! When one (or both) IVs have extend_mode wider than mode, but step doesn't fit into mode (the IV is (subreg:MODE (plus:EXTEND_MODE base (mult:EXTEND_MODE i step)) lowpart) ), such as for EXTEND_MODE SImode, MODE QImode and step e.g. 129, 128, 256 or 517, iv_number_of_iterations can create inval