[Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79985 Alexander Monakov changed: What|Removed |Added Status|NEW |RESOLVED Resolution|---

[Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79985 --- Comment #9 from Alexander Monakov --- Author: amonakov Date: Wed May 23 15:01:28 2018 New Revision: 260613 URL: https://gcc.gnu.org/viewcvs?rev=260613=gcc=rev Log: df-scan: remove ad-hoc handling of global regs in asms PR

[Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79985 --- Comment #8 from Alexander Monakov --- Unfortunately the above doesn't fully address the issue, as schedulers and other passes still have no idea that DF makes those assumptions and will allow reordering of asms: register int r asm("ebx");

[Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79985 --- Comment #7 from Alexander Monakov --- Or rather like this: diff --git a/gcc/df-scan.c b/gcc/df-scan.c index 95e1e0df2d5..732705c0385 100644 --- a/gcc/df-scan.c +++ b/gcc/df-scan.c @@ -3207,11 +3207,11 @@ df_insn_refs_collect (struct

[Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79985 Alexander Monakov changed: What|Removed |Added Assignee|unassigned at gcc dot gnu.org |amonakov at gcc dot gnu.org

[Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79985 --- Comment #5 from Andrey Belevantsev --- Well, we can special case this in sel-sched either along the lines of df-scan.c, or even easier, just forbid any asm reordering given the DF hunk. Generally speaking, we've been bitten a couple of

[Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79985 --- Comment #4 from Alexander Monakov --- It might have been nicer to adjust asms themselves, adding inputs/outputs for each global reg, if we must pretend the asms implicitly read/write them. That would allow any subsystem (df, sched-deps,

[Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79985 --- Comment #3 from Alexander Monakov --- Since r235809, in df-scan.c:df_insn_refs_collect, there's 3233 if (asm_noperands (PATTERN (insn_info->insn)) >= 0) 3234 for (unsigned i = 0; i < FIRST_PSEUDO_REGISTER; i++) 3235 if

[Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79985 --- Comment #2 from Segher Boessenkool --- Fails with -O2 -fselective-scheduling -mcpu=power8; also on BE, does not fail with power7. Confirmed.

[Bug rtl-optimization/79985] ICE in code_motion_path_driver, at sel-sched.c:6580

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79985 Alexander Monakov changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed|