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* [Bug c/100509] New: ICE at -O3: in fold_convert_loc, at fold-const.c:2552
@ 2021-05-10 19:34 cnsun at uwaterloo dot ca
  2021-05-10 21:15 ` [Bug tree-optimization/100509] ICE at -O3: in fold_convert_loc with variable (attribute) alias of different types pinskia at gcc dot gnu.org
                   ` (9 more replies)
  0 siblings, 10 replies; 11+ messages in thread
From: cnsun at uwaterloo dot ca @ 2021-05-10 19:34 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100509

            Bug ID: 100509
           Summary: ICE at -O3: in fold_convert_loc, at fold-const.c:2552
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: cnsun at uwaterloo dot ca
  Target Milestone: ---

Not sure whether this is a dup of PR96131.

$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/scratch/software/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /tmp/tmp.FRQzt2wMfl-gcc-builder/gcc/configure
--enable-languages=c,c++,lto --enable-checking-yes --enable-multiarch
--prefix=/scratch/software/gcc-trunk --disable-bootstrap
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20210510 (experimental) [master revision
:fb3a8fb4a:25f9f35a85ffee808fc1482b14d91176df59751b] (GCC)

$ cat mutant.c
struct X {
  int a;
};
const a = 0;
static struct X A __attribute__((alias("a")));
foo() { struct X b = A; }

$ gcc-trunk -O3 mutant.c
mutant.c:4:7: warning: type defaults to ‘int’ in declaration of ‘a’
[-Wimplicit-int]
    4 | const a = 0;
      |       ^
mutant.c:6:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
    6 | foo() { struct X b = A; }
      | ^~~
during GIMPLE pass: forwprop
mutant.c: In function ‘foo’:
mutant.c:6:16: internal compiler error: in fold_convert_loc, at
fold-const.c:2552
    6 | foo() { struct X b = A; }
      |                ^
0x6bd7c1 fold_convert_loc(unsigned int, tree_node*, tree_node*)
        /tmp/tmp.FRQzt2wMfl-gcc-builder/gcc/gcc/fold-const.c:2552
0xc02486 fold_stmt_1
        /tmp/tmp.FRQzt2wMfl-gcc-builder/gcc/gcc/gimple-fold.c:6269
0x1032191 execute
        /tmp/tmp.FRQzt2wMfl-gcc-builder/gcc/gcc/tree-ssa-forwprop.c:3108
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

^ permalink raw reply	[flat|nested] 11+ messages in thread
end of thread, other threads:[~2021-10-13 10:10 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-05-10 19:34 [Bug c/100509] New: ICE at -O3: in fold_convert_loc, at fold-const.c:2552 cnsun at uwaterloo dot ca
2021-05-10 21:15 ` [Bug tree-optimization/100509] ICE at -O3: in fold_convert_loc with variable (attribute) alias of different types pinskia at gcc dot gnu.org
2021-05-11  7:07 ` rguenth at gcc dot gnu.org
2021-05-11  8:09 ` marxin at gcc dot gnu.org
2021-05-11 10:48 ` cvs-commit at gcc dot gnu.org
2021-05-11 10:49 ` [Bug tree-optimization/100509] [9/10/11 Regression] " rguenth at gcc dot gnu.org
2021-05-25  8:07 ` cvs-commit at gcc dot gnu.org
2021-06-01  8:20 ` [Bug tree-optimization/100509] [9/10 " rguenth at gcc dot gnu.org
2021-06-16 14:24 ` cvs-commit at gcc dot gnu.org
2021-10-13 10:09 ` [Bug tree-optimization/100509] [9 " cvs-commit at gcc dot gnu.org
2021-10-13 10:10 ` rguenth at gcc dot gnu.org

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