On 01/23/2017 11:05 AM, Kyrill Tkachov wrote: > > On 23/01/17 09:58, Christophe Lyon wrote: >> On 13 January 2017 at 18:21, Jeff Law <l...@redhat.com> wrote: >>> On 01/13/2017 08:08 AM, Martin Liška wrote: >>>> Hello. >>>> >>>> Nice example provided in the PR causes ICE as we have an artificial symbol >>>> created in tree-profile.c once being removed by remove unreachable nodes >>>> (-O0) >>>> and once not (-O1). Well, difference is in process_references where >>>> following hunk >>>> prevent removal: >>>> >>>> || (((before_inlining_p >>>> && ((TREE_CODE (node->decl) != FUNCTION_DECL >>>> && optimize) >>>> >>>> Anyway, these artificial symbols really should be just declarations as >>>> they are defined >>>> in libgcov library. >>>> >>>> Patch can bootstrap on ppc64le-redhat-linux and survives regression tests. >>>> >>>> Ready to be installed? >>>> Martin >>>> >>>> >>>> 0001-Do-not-declare-artificial-variables-in-tree-profile..patch >>>> >>>> >>>> From 87262b1b60009381fd943fb433bc38f5d5685ac9 Mon Sep 17 00:00:00 2001 >>>> From: marxin <mli...@suse.cz> >>>> Date: Fri, 13 Jan 2017 13:12:57 +0100 >>>> Subject: [PATCH] Do not declare artificial variables in tree-profile.c to >>>> have >>>> a definition (PR lto/69188). >>>> >>>> gcc/testsuite/ChangeLog: >>>> >>>> 2017-01-13 Martin Liska <mli...@suse.cz> >>>> >>>> PR lto/69188 >>>> * gcc.dg/lto/pr69188_0.c: New test. >>>> * gcc.dg/lto/pr69188_1.c: New test. >>>> >>>> gcc/ChangeLog: >>>> >>>> 2017-01-13 Martin Liska <mli...@suse.cz> >>>> >>>> PR lto/69188 >>>> * tree-profile.c (init_ic_make_global_vars): Do not call >>>> finalize_decl. >>>> (gimple_init_gcov_profiler): Likewise. >>> OK. >>> jeff >>> >> Hi, >> >> The new test fails on arm-none-eabi: >> /cc6RcpEu.ltrans0.ltrans.o: In function `fn1': >> <artificial>:(.text+0x18): undefined reference to >> `__gcov_indirect_call_profiler_v2' >> <artificial>:(.text+0x1c): undefined reference to >> `__gcov_indirect_call_callee' >> <artificial>:(.text+0x20): undefined reference to >> `__gcov_indirect_call_callee' >> <artificial>:(.text+0x60): undefined reference to >> `__gcov_time_profiler_counter' >> <artificial>:(.text+0x64): undefined reference to >> `__gcov_time_profiler_counter' >> <artificial>:(.text+0x80): undefined reference to >> `__gcov_time_profiler_counter' >> <artificial>:(.text+0x84): undefined reference to >> `__gcov_time_profiler_counter' >> /cc6RcpEu.ltrans0.ltrans.o: In function `_GLOBAL__sub_D_00100_1_fn1': >> <artificial>:(.text+0xb8): undefined reference to `__gcov_exit' >> /cc6RcpEu.ltrans0.ltrans.o: In function `main': >> <artificial>:(.text+0xd4): undefined reference to >> `__gcov_indirect_call_profiler_v2' >> <artificial>:(.text+0xd8): undefined reference to >> `__gcov_indirect_call_callee' >> <artificial>:(.text+0xdc): undefined reference to >> `__gcov_indirect_call_callee' >> <artificial>:(.text+0x10c): undefined reference to >> `__gcov_time_profiler_counter' >> <artificial>:(.text+0x110): undefined reference to >> `__gcov_time_profiler_counter' >> /cc6RcpEu.ltrans0.ltrans.o: In function `_GLOBAL__sub_D_00100_1_main': >> <artificial>:(.text+0x180): undefined reference to `__gcov_exit' >> /cc6RcpEu.ltrans0.ltrans.o:(.data+0x4c): undefined reference to >> `__gcov_merge_time_profile' >> /cc6RcpEu.ltrans0.ltrans.o:(.data+0xac): undefined reference to >> `__gcov_merge_time_profile' >> collect2: error: ld returned 1 exit status >> >> FAIL: gcc.dg/lto/pr69188 c_lto_pr69188_0.o-c_lto_pr69188_1.o link, >> -flto -O0 -fprofile-generate >> >> It works on arm-linux*. > > Hi, > > The testcase fails on bare-metal targets that don't support profiling. > I believe it needs to be guarded with dg-require-profiling (I grepped around > the testsuite for similar directives). > With this patch the testcase appears unsupported on aarch64-none-elf where I > observed the failure. > > Ok to commit? > > Thanks, > Kyrill
Hi Kyrill. Thanks for the patch. Martin > > 2016-01-23 Kyrylo Tkachov <kyrylo.tkac...@arm.com> > > * gcc.dg/lto/pr69188_0.c: Require profiling support for testcase. > > >> Christophe >
