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* [Bug rtl-optimization/66237] New: [6.0 regression] FAIL: gcc.dg/tree-prof/pr34999.c compilation,  -fprofile-use -D_PROFILE_USE (internal compiler error)
@ 2015-05-21  9:26 schwab@linux-m68k.org
  2015-05-21 10:41 ` [Bug rtl-optimization/66237] [6 " rguenth at gcc dot gnu.org
                   ` (6 more replies)
  0 siblings, 7 replies; 8+ messages in thread
From: schwab@linux-m68k.org @ 2015-05-21  9:26 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66237

            Bug ID: 66237
           Summary: [6.0 regression] FAIL: gcc.dg/tree-prof/pr34999.c
                    compilation,  -fprofile-use -D_PROFILE_USE (internal
                    compiler error)
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: miyuki at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64-*-*

$ gcc/xgcc -Bgcc/ ../gcc/testsuite/gcc.dg/tree-prof/pr34999.c -O2
-freorder-blocks-and-partition -fprofile-generate -D_PROFILE_GENERATE -lm -o
pr34999.x01
$ ./pr34999.x01
$ gcc/xgcc -Bgcc/ ../gcc/testsuite/gcc.dg/tree-prof/pr34999.c -O2
-freorder-blocks-and-partition -fprofile-use -D_PROFILE_USE -lm -o pr34999.x02
../gcc/testsuite/gcc.dg/tree-prof/pr34999.c: In function ‘main’:
../gcc/testsuite/gcc.dg/tree-prof/pr34999.c:44:1: internal compiler error: in
as_a, at is-a.h:192
 }
 ^
0xe72e5f rtx_jump_insn* as_a<rtx_jump_insn*, rtx_insn>(rtx_insn*)
        ../../gcc/is-a.h:192
0xe72e5f fix_crossing_conditional_branches
        ../../gcc/bb-reorder.c:2047
0xe72e5f execute
        ../../gcc/bb-reorder.c:2742

f9a00e9e5f0f056b558f8615e3c030d37923ee72 is the first bad commit
commit f9a00e9e5f0f056b558f8615e3c030d37923ee72
Author: miyuki <miyuki@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Wed May 20 19:39:42 2015 +0000

    Promote types of RTL expressions to more derived ones.
>From gcc-bugs-return-486905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 21 09:26:01 2015
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Subject: [Bug rtl-optimization/66236] [6 Regression] FAIL: gcc.c-torture/execute/pr42691.c on alpha-linux-gnu
Date: Thu, 21 May 2015 09:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66236

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |law at gcc dot gnu.org,
                   |                            |thopre01 at gcc dot gnu.org

--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Caused by r223113.

This problem can be triggered by a crosscompiler to alpha-linux-gnu.
>From gcc-bugs-return-486907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 21 09:28:59 2015
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/65979] Multiple issues in conftest.c prevent build on sh4-linux-gnu
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ide979

--- Comment #19 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #18)

> Yes, that is true.  However, because op0, op1, op2 are all "arith_reg_dest"
> the peephole will only match if those are GP regs.  Each captured insn will
> only reference a single GP reg, because DImode moves should have been
> smashed into SImode moves before the peephole2 pass.  Thus, I think it
> should be safe to just force the mode of op0 to SImode.  I'll try it out.

The following seems to work OK and I'd propose this as a fix for the problem:

Index: gcc/config/sh/sh.md
==================================================================--- gcc/config/sh/sh.md (revision 223416)
+++ gcc/config/sh/sh.md (working copy)
@@ -14721,7 +14721,11 @@
        || REGNO (operands[2]) == REGNO (operands[5]))"
   [(const_int 0)]
 {
-  sh_check_add_incdec_notes (emit_move_insn (operands[2], operands[3]));
+  if (REGNO (operands[1]) == REGNO (operands[2]))
+      operands[2] = gen_rtx_REG (SImode, REGNO (operands[0]));
+
+  sh_check_add_incdec_notes (emit_insn (gen_rtx_SET (operands[2],
+                                                    operands[3])));
   emit_insn (gen_tstsi_t (operands[2],
                          gen_rtx_REG (SImode, (REGNO (operands[1])))));
 })
@@ -14748,7 +14752,8 @@
        || REGNO (operands[2]) == REGNO (operands[5]))"
   [(const_int 0)]
 {
-  sh_check_add_incdec_notes (emit_move_insn (operands[2], operands[3]));
+  sh_check_add_incdec_notes (emit_insn (gen_rtx_SET (operands[2],
+                                                    operands[3])));
   emit_insn (gen_tstsi_t (operands[2],
                          gen_rtx_REG (SImode, (REGNO (operands[1])))));
 })


Could you guys please test this patch?  Actually, now it looks quite obvious I
think.


^ permalink raw reply	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2015-07-06 22:03 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-05-21  9:26 [Bug rtl-optimization/66237] New: [6.0 regression] FAIL: gcc.dg/tree-prof/pr34999.c compilation, -fprofile-use -D_PROFILE_USE (internal compiler error) schwab@linux-m68k.org
2015-05-21 10:41 ` [Bug rtl-optimization/66237] [6 " rguenth at gcc dot gnu.org
2015-05-21 14:04 ` miyuki at gcc dot gnu.org
2015-05-21 14:10 ` schwab@linux-m68k.org
2015-05-21 14:19 ` schwab@linux-m68k.org
2015-05-21 21:27 ` schwab@linux-m68k.org
2015-05-22 22:58 ` miyuki at gcc dot gnu.org
2015-07-06 22:03 ` miyuki at gcc dot gnu.org

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