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* [Bug debug/103756] New: [12 Regression] -fcompare-debug failure (length) with -O -fconserve-stack -frename-registers -fno-tree-ch -fira-algorithm=priority
@ 2021-12-17  8:11 zsojka at seznam dot cz
  2021-12-17  8:20 ` [Bug rtl-optimization/103756] " pinskia at gcc dot gnu.org
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: zsojka at seznam dot cz @ 2021-12-17  8:11 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103756

            Bug ID: 103756
           Summary: [12 Regression] -fcompare-debug failure (length) with
                    -O -fconserve-stack -frename-registers -fno-tree-ch
                    -fira-algorithm=priority
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
                CC: aoliva at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu

Created attachment 52022
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52022&action=edit
auto-reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -fcompare-debug -fconserve-stack
-frename-registers -fno-tree-ch -fira-algorithm=priority testcase.C 
x86_64-pc-linux-gnu-gcc: error: testcase.C: '-fcompare-debug' failure (length)

$ diff -u *gkd
--- a-testcase.C.gkd    2021-12-17 09:05:04.178074934 +0100
+++ a-testcase.gk.C.gkd 2021-12-17 09:05:04.238074933 +0100
@@ -75,6 +75,9 @@
         ]) "testcase.C":21:25# {*subdi_1}
      (expr_list:REG_UNUSED (reg:CC 17 flags)
         (nil)))
+(insn # 0 0 2 (set (reg:DI 39 r11 [orig:91 _40 ] [91])
+        (reg/f:DI 5 di [orig:104 *__last_4(D).current ] [104]))
"testcase.C":21:25# {*movdi_internal}
+     (nil))
 (insn # 0 0 2 (set (reg:QI 38 r10 [orig:89 __copy_move_b___trans_tmp_9.1_32 ]
[89])
         (mem/c:QI (symbol_ref:DI ("__copy_move_b___trans_tmp_9") [flags 0x2] 
<var_decl # __copy_move_b___trans_tmp_9>) [ __copy_move_b___trans_tmp_9+0 S1
A8])) "testcase.C":29:24# {*movqi_internal}
      (nil))
@@ -84,7 +87,8 @@
 (insn # 0 0 2 (set (reg:SI 4 si [105])
         (plus:SI (reg:SI 36 r8 [orig:86 _13 ] [86])
             (reg:SI 5 di [orig:91 _40 ] [91]))) "testcase.C":27:16# {*leasi}
-     (nil))
+     (expr_list:REG_DEAD (reg:SI 5 di [orig:91 _40 ] [91])
+        (nil)))
 (jump_insn # 0 0 2 (set (pc)
         (label_ref #)) "testcase.C":27:5# {jump}
      (nil)
@@ -131,12 +135,12 @@
  -> 3)
 (note # 0 0 [bb 5] NOTE_INSN_BASIC_BLOCK)
 (insn # 0 0 5 (set (reg:DI 0 ax [orig:107 _40 ] [107])
-        (zero_extend:DI (reg:SI 5 di [orig:91 _40 ] [91]))) "testcase.C":9:45#
{*zero_extendsidi2}
+        (zero_extend:DI (reg:SI 39 r11 [orig:91 _40 ] [91])))
"testcase.C":9:45# {*zero_extendsidi2}
      (nil))
 (insn # 0 0 5 (set (reg:CCGOC 17 flags)
-        (compare:CCGOC (reg:SI 5 di [orig:91 _40 ] [91])
+        (compare:CCGOC (reg:SI 39 r11 [orig:91 _40 ] [91])
             (const_int 0 [0]))) "testcase.C":9:45# {*cmpsi_ccno_1}
-     (expr_list:REG_DEAD (reg:SI 5 di [orig:91 _40 ] [91])
+     (expr_list:REG_DEAD (reg:SI 39 r11 [orig:91 _40 ] [91])
         (nil)))
 (insn # 0 0 5 (set (reg:DI 2 cx [108])
         (const_int 0 [0])) "testcase.C":9:45# {*movdi_internal}

$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r12-6031-20211217093444-g79a89108dd3-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r12-6031-20211217093444-g79a89108dd3-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.0 20211217 (experimental) (GCC)

^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-12-30 21:28 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-12-17  8:11 [Bug debug/103756] New: [12 Regression] -fcompare-debug failure (length) with -O -fconserve-stack -frename-registers -fno-tree-ch -fira-algorithm=priority zsojka at seznam dot cz
2021-12-17  8:20 ` [Bug rtl-optimization/103756] " pinskia at gcc dot gnu.org
2021-12-17  8:47 ` [Bug rtl-optimization/103756] [12 Regression] -fcompare-debug failure (length) with -O -fconserve-stack -frename-registers -fno-tree-ch -fira-algorithm=priority since r12-5978-ga888259a71fbbb7f marxin at gcc dot gnu.org
2021-12-28 18:00 ` jakub at gcc dot gnu.org
2021-12-30 21:26 ` cvs-commit at gcc dot gnu.org
2021-12-30 21:28 ` jakub at gcc dot gnu.org

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