[Bug d/104835] New: [12 Regression] libphobos fails to build on mips64el-linux-gnu

[Bug d/104835] New: [12 Regression] libphobos fails to build on mips64el-linux-gnu

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104835

            Bug ID: 104835
           Summary: [12 Regression] libphobos fails to build on
                    mips64el-linux-gnu
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
          Reporter: doko at gcc dot gnu.org
  Target Milestone: ---

seen with trunk 20220302 on mips64el-linux-gnu:

libtool: compile:  /<<PKGBUILDDIR>>/build/./gcc/gdc
-B/<<PKGBUILDDIR>>/build/./gcc/ -B/usr/mips6
4el-linux-gnuabi64/bin/ -B/usr/mips64el-linux-gnuabi64/lib/ -isystem
/usr/mips64el-linux-gnuabi6
4/include -isystem /usr/mips64el-linux-gnuabi64/sys-include -isystem
/<<PKGBUILDDIR>>/build/sys-
include -fno-checking -fversion=Shared -Wall -frelease -ffunction-sections
-fdata-sections -O2 -
g -fpreview=dip1000 -fpreview=fieldwise -fpreview=dtorfields -nostdinc -I
../../../../src/libpho
bos/libdruntime -I . -c
../../../../src/libphobos/libdruntime/core/internal/parseoptions.d  -fPI
C -fversion=Shared -o core/internal/.libs/parseoptions.o
d21: internal compiler error: Segmentation fault
0x1203cbc7f
_D3dmd10dinterpret11Interpreter21interpretAssignCommonMFCQCd10expression6BinExpPFKxS
QDe7globals3LocCQDu5mtype4TypeCQEjQCg10ExpressionQtZSQFfQDc8UnionExpiZv
        ../../src/gcc/d/dmd/dinterpret.d:3678
0x1203b7de3
_D3dmd10dinterpret9interpretFPSQBd10expression8UnionExpCQCcQz10ExpressionPSQCvQCu10I
nterStateEQDoQDn8CTFEGoalZQCd
        ../../src/gcc/d/dmd/dinterpret.d:6420
0x1203b7de3
_D3dmd10dinterpret15interpretRegionFCQBj10expression10ExpressionPSQCmQCl10InterState
EQDfQDe8CTFEGoalZQCn
        ../../src/gcc/d/dmd/dinterpret.d:6448
0x1203cf5a3 Interpreter::visit(CallExp*)
        ../../src/gcc/d/dmd/dinterpret.d:4843
0x1203b855b
_D3dmd10dinterpret9interpretFPSQBd10expression8UnionExpCQCcQz10ExpressionPSQCvQCu10I
nterStateEQDoQDn8CTFEGoalZQCd
        ../../src/gcc/d/dmd/dinterpret.d:6420
0x1203b855b Interpreter::visit(ExpStatement*)
        ../../src/gcc/d/dmd/dinterpret.d:805
0x1203b855b Interpreter::visit(ExpStatement*)
        ../../src/gcc/d/dmd/dinterpret.d:790
0x1203b8c7b
_D3dmd10dinterpret9interpretFPSQBd10expression8UnionExpCQCc9statement9StatementPSQDbQDa10InterStateZCQDvQCs10Expression
        ../../src/gcc/d/dmd/dinterpret.d:6485
0x1203b8c7b Interpreter::visit(IfStatement*)
        ../../src/gcc/d/dmd/dinterpret.d:907
0x1203b577b
_D3dmd10dinterpret9interpretFPSQBd10expression8UnionExpCQCc9statement9StatementPSQDbQDa10InterStateZCQDvQCs10Expression
        ../../src/gcc/d/dmd/dinterpret.d:6485
0x1203b577b Interpreter::visit(CompoundStatement*)
        ../../src/gcc/d/dmd/dinterpret.d:823
0x1203b577b
_D3dmd10dinterpret9interpretFPSQBd10expression8UnionExpCQCc9statement9StatementPSQDbQDa10InterStateZCQDvQCs10Expression
        ../../src/gcc/d/dmd/dinterpret.d:6485
0x1203b577b Interpreter::visit(CompoundStatement*)
        ../../src/gcc/d/dmd/dinterpret.d:823
0x1203c5b97
_D3dmd10dinterpret9interpretFPSQBd10expression8UnionExpCQCc9statement9StatementPSQDbQDa10InterStateZCQDvQCs10Expression
        ../../src/gcc/d/dmd/dinterpret.d:6485
0x1203c5b97
_D3dmd10dinterpret17interpretFunctionFPSQBm10expression8UnionExpCQCl4func15FuncDeclarationPSQDmQDl10InterStatePSQEg4root5array__T5ArrayTCQFfQDt10ExpressionZQBbQxZQBa
        ../../src/gcc/d/dmd/dinterpret.d:644
0x1203cefcf Interpreter::visit(CallExp*)
        ../../src/gcc/d/dmd/dinterpret.d:4962
0x1203b9483
_D3dmd10dinterpret9interpretFPSQBd10expression8UnionExpCQCcQz10ExpressionPSQCvQCu10InterStateEQDoQDn8CTFEGoalZQCd
        ../../src/gcc/d/dmd/dinterpret.d:6420
0x1203b9483 Interpreter::visit(ReturnStatement*)
        ../../src/gcc/d/dmd/dinterpret.d:1037
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-12/README.Bugs> for instructions.
make[7]: *** [Makefile:2475: core/internal/parseoptions.lo] Error 1

[Bug d/104835] [12 Regression] libphobos fails to build on mips64el-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104835

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |12.0

[Bug d/104835] [12 Regression] libphobos fails to build on mips64el-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104835

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4

[Bug d/104835] [12 Regression] libphobos fails to build on mips64el-linux-gnu

[ibuclaw at gdcproject dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104835

Iain Buclaw <ibuclaw at gdcproject dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |syq at debian dot org

--- Comment #1 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
*** Bug 104538 has been marked as a duplicate of this bug. ***

[Bug d/104835] [12 Regression] libphobos fails to build on mips64el-linux-gnu

[ibuclaw at gdcproject dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104835

--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
The backtrace I get is:

d21: internal compiler error: output_operand: '%l' operand isn't a label
0x1208268cf output_operand_lossage(char const*, ...)
        ../../gcc/final.cc:3235
0x12082692b output_asm_label(rtx_def*)
        ../../gcc/final.cc:3638
0x1203d83af
_D3dmd10expression__T10emplaceExpHTCQBiQBh15ArrayLiteralExpTSQCh7globals3LocTCQCy5mtype4TypeTPSQDp4root5array__T5ArrayTCQEoQEn10ExpressionZQBbZQEsFPvQDlQCxQCkZv
        /home/ibuclaw/gcc/gcc/d/dmd/expression.d:77
0x1203de093
_D3dmd8ctfeexpr24changeArrayLiteralLengthFKxSQBr7globals3LocCQCh5mtype9TypeArrayCQDb10expression10ExpressionmmZSQEgQBf8UnionExp
        ../../gcc/d/dmd/ctfeexpr.d:1826
0x12040dcbf
_D3dmd10dinterpret11Interpreter21interpretAssignCommonMFCQCd10expression6BinExpPFKxSQDe7globals3LocCQDu5mtype4TypeCQEjQCg10ExpressionQtZSQFfQDc8UnionExpiZv
        ../../gcc/d/dmd/dinterpret.d:3678
... (the rest as per the original)

The jump from front-end to final.cc is not in code.

[Bug d/104835] [12 Regression] libphobos fails to build on mips64el-linux-gnu

[ibuclaw at gdcproject dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104835

--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Ends with:

#86 0x0000000120582768 in semantic3(Dsymbol*, Scope*) (sc=<error reading
variable: dwarf2_find_location_expression: Corrupted DWARF expression.>, 
    dsym=<error reading variable: dwarf2_find_location_expression: Corrupted
DWARF expression.>) at ../../gcc/d/dmd/semantic3.d:1525
#87 Semantic3Visitor::visit(AggregateDeclaration*) (this=0xffffffbab0,
ad=0xfff76c0800) at ../../gcc/d/dmd/semantic3.d:1526
#88 0x000000012057e608 in semantic3(Dsymbol*, Scope*) (sc=<error reading
variable: dwarf2_find_location_expression: Corrupted DWARF expression.>, 
    dsym=<error reading variable: dwarf2_find_location_expression: Corrupted
DWARF expression.>) at ../../gcc/d/dmd/semantic3.d:193
#89 Semantic3Visitor::visit(Module*) (this=<error reading variable:
dwarf2_find_location_expression: Corrupted DWARF expression.>,
mod=0xfff76b2400) at ../../gcc/d/dmd/semantic3.d:195
#90 Semantic3Visitor::visit(Module*) (this=<optimized out>, mod=0xfff76b2400)
at ../../gcc/d/dmd/semantic3.d:179
#91 0x000000012057eb70 in semantic3(Dsymbol*, Scope*) (dsym=<optimized out>,
sc=<optimized out>) at ../../gcc/d/dmd/semantic3.d:82
#92 0x0000000120634800 in d_parse_file () at ../../gcc/d/d-lang.cc:1244
#93 0x0000000120c16944 in compile_file () at ../../gcc/toplev.cc:452
#94 0x000000012038688c in do_compile (no_backend=false) at
../../gcc/toplev.cc:2168
#95 toplev::main (this=<optimized out>, argc=<error reading variable:
dwarf2_find_location_expression: Corrupted DWARF expression.>, 
    argv=<error reading variable: dwarf2_find_location_expression: Corrupted
DWARF expression.>) at ../../gcc/toplev.cc:2320
#96 0x0000000120388208 in main (argc=<optimized out>, argv=0xffffffbf98) at
../../gcc/main.cc:39


96 doesn't seem deep enough for it to be a stack overflow, but that's the only
explanation of the cause.  The interpret code does have a heavy emphasis on
stack with the UnionExp passed around.

[Bug d/104835] [12 Regression] libphobos fails to build on mips64el-linux-gnu

[ibuclaw at gdcproject dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104835

Iain Buclaw <ibuclaw at gdcproject dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://github.com/dlang/dm
                   |                            |d/pull/13805

--- Comment #4 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Raised pull request in upstream dmd.

Why the new version works but the old doesn't is anyone's guess though.  It's
the difference between:

---
T tmp = T(args);
__builtin_memcpy(p, (void*)&tmp, sizeof(T));
---
and
---
new(p) T(args);
---

As far as I can tell, both should end up with the same outcome.

[Bug d/104835] [12 Regression] libphobos fails to build on mips64el-linux-gnu

[ibuclaw at gdcproject dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104835

Iain Buclaw <ibuclaw at gdcproject dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Fix committed in r12-7636.