Hi! On 2022-02-23T12:14:57+0100, Tom de Vries via Gcc-patches <gcc-patches@gcc.gnu.org> wrote: > [ Re: [committed][nvptx] Add -mptx-comment ] > > On 2/22/22 14:53, Tom de Vries wrote: >> Add functionality that indicates which insns are added by -minit-regs, such >> that for instance we have for pr53465.s: >> ... >> // #APP >> // 9 "gcc/testsuite/gcc.c-torture/execute/pr53465.c" 1 >> // Start: Added by -minit-regs=3: >> // #NO_APP >> mov.u32 %r26, 0; >> // #APP >> // 9 "gcc/testsuite/gcc.c-torture/execute/pr53465.c" 1 >> // End: Added by -minit-regs=3: >> // #NO_APP >> ... >> >> Can be switched off using -mno-ptx-comment. >> >> Tested on nvptx. > > But tested in combination with another patch, which is still waiting for > review. > > This patch by itself caused some regressions
I'd just begun analyzing and determined that it was commit c2b23aaaf4457278403c01cd145cd3936683384e "[nvptx] Add -mptx-comment" that causes a load of FAILs in nvptx offloading testing: Program received signal SIGSEGV, Segmentation fault. 0x000000000084abad in final_scan_insn_1 (insn=insn@entry=0x7ffff7380940, file=file@entry=0x1f50c40, optimize_p=optimize_p@entry=0, nopeepholes=nopeepholes@entry=0, seen=seen@entry=0x7fffffffd07c) at [...]/source-gcc/gcc/final.cc:2650 2650 if (*loc.file && loc.line) (gdb) print loc $1 = {file = 0x0, line = 0, column = 0, data = 0x0, sysp = false} (gdb) bt #0 0x000000000084abad in final_scan_insn_1 (insn=insn@entry=0x7ffff7380940, file=file@entry=0x1f50c40, optimize_p=optimize_p@entry=0, nopeepholes=nopeepholes@entry=0, seen=seen@entry=0x7fffffffd07c) at [...]/source-gcc/gcc/final.cc:2650 #1 0x000000000084b86a in final_scan_insn (insn=insn@entry=0x7ffff7380940, file=file@entry=0x1f50c40, optimize_p=optimize_p@entry=0, nopeepholes=nopeepholes@entry=0, seen=seen@entry=0x7fffffffd07c) at [...]/source-gcc/gcc/final.cc:2942 #2 0x000000000084823a in final_1 (first=0x7ffff74631c0, file=0x1f50c40, seen=1, optimize_p=0) at [...]/source-gcc/gcc/final.cc:1999 #3 0x000000000085091a in rest_of_handle_final () at [...]/source-gcc/gcc/final.cc:4287 #4 0x0000000000850de4 in (anonymous namespace)::pass_final::execute (this=0x1f4bd00) at [...]/source-gcc/gcc/final.cc:4365 #5 0x0000000000b781b1 in execute_one_pass (pass=pass@entry=0x1f4bd00) at [...]/source-gcc/gcc/passes.cc:2639 #6 0x0000000000b7855a in execute_pass_list_1 (pass=0x1f4bd00) at [...]/source-gcc/gcc/passes.cc:2739 #7 0x0000000000b7858d in execute_pass_list_1 (pass=0x1f4b820) at [...]/source-gcc/gcc/passes.cc:2740 #8 0x0000000000b7858d in execute_pass_list_1 (pass=0x1f49d20, pass@entry=0x1f45780) at [...]/source-gcc/gcc/passes.cc:2740 #9 0x0000000000b785e9 in execute_pass_list (fn=0x7ffff72e1e40, pass=0x1f45780) at [...]/source-gcc/gcc/passes.cc:2750 #10 0x0000000000732a66 in cgraph_node::expand (this=0x7ffff72efbb0) at [...]/source-gcc/gcc/cgraphunit.cc:1836 #11 0x000000000073336a in cgraph_order_sort::process (this=0x20730f8) at [...]/source-gcc/gcc/cgraphunit.cc:2075 #12 0x00000000007336f4 in output_in_order () at [...]/source-gcc/gcc/cgraphunit.cc:2143 #13 0x0000000000733dbe in symbol_table::compile (this=0x7ffff7542000) at [...]/source-gcc/gcc/cgraphunit.cc:2347 #14 0x000000000065d79b in lto_main () at [...]/source-gcc/gcc/lto/lto.cc:655 #15 0x0000000000c709e6 in compile_file () at [...]/source-gcc/gcc/toplev.cc:454 #16 0x0000000000c73abb in do_compile (no_backend=no_backend@entry=false) at [...]/source-gcc/gcc/toplev.cc:2160 #17 0x0000000000c73ea6 in toplev::main (this=this@entry=0x7fffffffd4b0, argc=argc@entry=16, argv=0x1f1db40, argv@entry=0x7fffffffd5b8) at [...]/source-gcc/gcc/toplev.cc:2312 #18 0x000000000174fe5f in main (argc=16, argv=0x7fffffffd5b8) at [...]/source-gcc/gcc/main.cc:41 > currently testing attached > fix. Per the test results that I've got so far (but is still running), your proposed fix does resolve the SIGSEGVs, thanks. Grüße Thomas > [nvptx] Fix dummy location in gen_comment > > I committed "[nvptx] Add -mptx-comment", but tested it in combination with the > proposed "[final] Handle compiler-generated asm insn" ( > https://gcc.gnu.org/pipermail/gcc-patches/2022-February/590721.html ), so > by itself the commit introduced some regressions: > ... > FAIL: gcc.dg/20020426-2.c (internal compiler error: Segmentation fault) > FAIL: gcc.dg/analyzer/zlib-3.c (internal compiler error: Segmentation fault) > FAIL: gcc.dg/pr101223.c (internal compiler error: Segmentation fault) > FAIL: gcc.dg/torture/pr80764.c -O2 (internal compiler error: Segmentation > fault) > ... > > There are due to cfun->function_start_locus == 0. > > Fix these by using DECL_SOURCE_LOCATION (cfun->decl) instead. > > Tested on nvptx. > > gcc/ChangeLog: > > 2022-02-23 Tom de Vries <tdevr...@suse.de> > > * config/nvptx/nvptx.cc (gen_comment): Use > DECL_SOURCE_LOCATION (cfun->decl) instead of cfun->function_start_locus. > > --- > gcc/config/nvptx/nvptx.cc | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/gcc/config/nvptx/nvptx.cc b/gcc/config/nvptx/nvptx.cc > index 858789e6df76..6f6d592e4621 100644 > --- a/gcc/config/nvptx/nvptx.cc > +++ b/gcc/config/nvptx/nvptx.cc > @@ -5382,7 +5382,7 @@ gen_comment (const char *s) > char *comment = (char *) alloca (len); > snprintf (comment, len, "%s%s%s", ASM_COMMENT_START, sep, s); > return gen_rtx_ASM_INPUT_loc (VOIDmode, ggc_strdup (comment), > - cfun->function_start_locus); > + DECL_SOURCE_LOCATION (cfun->decl)); > } > > /* Initialize all declared regs at function entry. ----------------- Siemens Electronic Design Automation GmbH; Anschrift: Arnulfstraße 201, 80634 München; Gesellschaft mit beschränkter Haftung; Geschäftsführer: Thomas Heurung, Frank Thürauf; Sitz der Gesellschaft: München; Registergericht München, HRB 106955