Hi Richard, > On Thu, 6 Apr 2017, Rainer Orth wrote: > >> Hi Richard, >> >> > The following patch makes sure to preserve (mis-)alignment of memory >> > references when IVOPTs generates TARGET_MEM_REFs for them. >> > >> > Bootstrapped on x86_64-unknown-linux-gnu, testing in progress. >> > >> > Richard. >> > >> > 2017-04-06 Richard Biener <rguent...@suse.de> >> > >> > PR tree-optimization/80334 >> > * tree-ssa-loop-ivopts.c (rewrite_use_address): Properly >> > preserve alignment of accesses. >> > >> > * g++.dg/torture/pr80334.C: New testcase. >> >> the new testcase FAILs on 32-bit Solaris/SPARC: >> >> +FAIL: g++.dg/torture/pr80334.C -O0 (test for excess errors) >> +FAIL: g++.dg/torture/pr80334.C -O1 (test for excess errors) >> +FAIL: g++.dg/torture/pr80334.C -O2 (test for excess errors) >> +FAIL: g++.dg/torture/pr80334.C -O2 -flto (test for excess errors) >> +FAIL: g++.dg/torture/pr80334.C -O2 -flto -flto-partition=none (test for >> exce >> ss errors) >> +FAIL: g++.dg/torture/pr80334.C -O3 -fomit-frame-pointer -funroll-loops >> -fpeel >> -loops -ftracer -finline-functions (test for excess errors) >> +FAIL: g++.dg/torture/pr80334.C -O3 -g (test for excess errors) >> +FAIL: g++.dg/torture/pr80334.C -Os (test for excess errors) >> >> Excess errors: >> /vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.dg/torture/pr80334.C:11:20: >> warning: requested alignment 16 is larger than 8 [-Wattributes] > > Any suggestion how to mitigate that? Possible solution includes > adding { target { ! ... } } to dg-do run.
No idea. However, according to gcc-testresults there are other failures: s390-ibm-inux-gnu and s390x-ibm-linux-gnu so far. This might argue against just excluding a random list of failing targets. Rainer -- ----------------------------------------------------------------------------- Rainer Orth, Center for Biotechnology, Bielefeld University