Re: [PATCH GCC]A latent alignment bug in tree-ssa-address.c

On Mon, May 23, 2016 at 4:29 PM, Bin.Cheng wrote: > On Mon, May 23, 2016 at 3:16 PM, Richard Biener > wrote: >> On Mon, May 23, 2016 at 3:23 PM, Bin Cheng wrote: >>> Hi, >>> When working on PR69710, I ran into this latent bug

Re: [PATCH GCC]A latent alignment bug in tree-ssa-address.c

On Mon, May 23, 2016 at 3:16 PM, Richard Biener wrote: > On Mon, May 23, 2016 at 3:23 PM, Bin Cheng wrote: >> Hi, >> When working on PR69710, I ran into this latent bug in which alignment >> information is wrongly updated for pointer variables. It

Re: [PATCH GCC]A latent alignment bug in tree-ssa-address.c

On Mon, May 23, 2016 at 3:23 PM, Bin Cheng wrote: > Hi, > When working on PR69710, I ran into this latent bug in which alignment > information is wrongly updated for pointer variables. It results in memory > exceptions on x86_64 after patch for PR69710. Scenario is that

[PATCH GCC]A latent alignment bug in tree-ssa-address.c

Hi, When working on PR69710, I ran into this latent bug in which alignment information is wrongly updated for pointer variables. It results in memory exceptions on x86_64 after patch for PR69710. Scenario is that copy_ref_info tries to update base's alignment in TARGET_MEM_REF[base + index <<