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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/68097] We should track ranges for floating-point values too Date: Mon, 26 Oct 2015 11:37:00 -0000 [thread overview] Message-ID: <bug-68097-4-fb1OvmALNm@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-68097-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68097 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |missed-optimization Status|UNCONFIRMED |NEW Last reconfirmed| |2015-10-26 CC| |rguenth at gcc dot gnu.org Version|unknown |6.0 Ever confirmed|0 |1 --- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- Confirmed. Note the main part will be to make the FP "range info" available on SSA names. Other useful queries would include "cannot be Inf/NaN/signed zero". Note that transforms based on this (and also nonnegative!) need to be careful as there are no data dependences on conditions. Thus with if (x > 0.) foo (x); we may not optimize foo based on 'nonnegative' as code motion has no barrier that prevents it from hoisting it before the if. Yes, vectors could also be handled (and yes, please one "value range" per SSA name only). Likewise complex (integer) types.
next prev parent reply other threads:[~2015-10-26 11:37 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-10-26 8:48 [Bug tree-optimization/68097] New: " rsandifo at gcc dot gnu.org 2015-10-26 8:50 ` [Bug tree-optimization/68097] " pinskia at gcc dot gnu.org 2015-10-26 10:36 ` glisse at gcc dot gnu.org 2015-10-26 11:37 ` rguenth at gcc dot gnu.org [this message] 2015-10-27 11:53 ` rsandifo at gcc dot gnu.org 2022-09-17 12:10 ` aldyh at gcc dot gnu.org 2022-09-19 7:03 ` rguenth at gcc dot gnu.org 2022-09-19 7:31 ` aldyh at gcc dot gnu.org 2022-09-20 17:36 ` cvs-commit at gcc dot gnu.org 2022-11-08 15:57 ` aldyh at gcc dot gnu.org 2022-11-17 8:54 ` cvs-commit at gcc dot gnu.org 2022-11-17 8:54 ` aldyh at gcc dot gnu.org 2022-11-28 22:24 ` pinskia at gcc dot gnu.org
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