2013/11/5 Jeff Law <l...@redhat.com>: > On 11/04/13 06:27, Richard Biener wrote: >> >> On Thu, Oct 31, 2013 at 10:02 AM, Ilya Enkovich <enkovich....@gmail.com> >> wrote: >>> >>> Hi, >>> >>> Here is a patch which hadles the problem with optimization of >>> BUILT_IN_CHKP_ARG_BND calls. Pointer Bounds Checker expects that argument >>> of this call is a default SSA_NAME of the PARM_DECL whose bounds we want to >>> get. The problem is in optimizations which may replace arg with it's copy >>> or a known value. This patch suppress such modifications. >> >> >> This doesn't seem like a good fix. I suppose you require the same on >> RTL, that is, have the incoming arg reg coalesced with the use? >> In that case better set SSA_NAME_OCCURS_IN_ABNORMAL_PHI. > > I agree. This seems like the wrong direction. > > While I don't like abusing SSA_NAME_OCCURS_IN_ABNORMAL_PHI in this manner, > setting that flag should give them precisely the behaviour they want. That > makes me think SSA_NAME_OCCURS_IN_ABNORMAL_PHI is poorly named. But > addressing that is separate from this patch. > > Ilya, can you convert your code to set SSA_NAME_OCCURS_IN_ABNORMAL_PHI and > drop this patch?
OK. I'll try SSA_NAME_OCCURS_IN_ABNORMAL_PHI approach and see if it causes any problems. Thanks, Ilya > > > Jeff >
