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X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR07MB3419 X-SW-Source: 2017-07/txt/msg00041.txt.bz2 On Tue, Jul 25, 2017 at 12:45 PM, Steve Ellcey wrote: > > Following up to my own mail at > ttps://sourceware.org/ml/gdb/2017-07/msg00037.html > > It looks like the problem is with the GCC compiler. If I use > GCC 4.8.4 to run the gdb.base/store.c test case it works, > if I use GCC 5.4.0 it does not. I actually get around 50 or > more gdb failures when I use GCC 5.4.0 rather than GCC 4.8.0. > I believe that this may be due to aarch64 changing over from > reload to lra during this timeframe. > > I have also found that the test case works if I remove the > register keywords from the test. Apparently the register > keyword is ignored when optimizing but not at -O0. function.c: /* Return true if we should assign DECL a pseudo register; false if it should live on the local stack. */ bool use_register_for_decl (const_tree decl) { .... if (optimize) return true; if (!DECL_REGISTER (decl)) return false; /* When not optimizing, disregard register keyword for types that could have methods, otherwise the methods won't be callable from the debugger. */ if (RECORD_OR_UNION_TYPE_P (TREE_TYPE (decl))) return false; return true; } --------- CUT ------ This code has been that way since 2009 (r144939) but that function returned true for DECL_REGISTER before that. Thanks, Andrew Pinski > > Steve Ellcey > sellcey@cavium.com