https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112922
Bug ID: 112922 Summary: 465.tonto from SPECFP 2006 fails train run on Aarch64-linux with -O2 and -flto Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: jamborm at gcc dot gnu.org Blocks: 26163 Target Milestone: --- Host: aarch64-linux Target: aarch64-linux At some point between r14-6211-g056cce412862f8 and r14-6290-g9f0f7d802482a8 465.tonto started to fail its train run when compiled with -O2 -g -flto and PGO on Aarch64-linux. My Aarch64 machine is a bit slow so I'd like to ask someone with a spare modern one to bisect this to an exact revision. I do not observe the failure on x86_64 (and so for now I have guessed its component is "target"). The miscomparison is: 0056: SCF Energy = -407.833257 SCF Energy = -878703.963298 ^ 0057: Kinetic Energy = 406.333744 Kinetic Energy = 426.858584 ^ 0087: Chi^2 in F = 4.143448 Chi^2 in F = 19.253240 ^ 0088: Goodness of fit in F = 2.035546 Goodness of fit in F = 4.387851 ^ 0089: R factor in F = 0.046861 R factor in F = 0.096290 ^ 0090: Weighted R factor in F = 0.054923 Weighted R factor in F = 0.118393 ^ 0098: Secondary extinction factor = -0.000010 Secondary extinction factor = -0.000075 ^ 0100: Scale factor = 1.010260 Scale factor = 1.023437 ^ 0105: 0 0.140000 4.143448 -407.833257 *Damping on 0 0.140000 19.253240 -878703.963298 *Damping on ^ 0108: 1 0.140000 4.844793 -406.881314 1 0.140000 105.264541 -1961055.460671 Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163 [Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)