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]
Rainer
--
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Rainer Orth, Center for Biotechnology, Bielefeld University
