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* [Bug rtl-optimization/94292] New: [10 Regression] ICE: SIGSEGV in forward_propagate_and_simplify (fwprop.c:1417) with -O -g -fno-tree-dce
@ 2020-03-23 19:02 zsojka at seznam dot cz
  2020-03-24  7:06 ` [Bug rtl-optimization/94292] [10 Regression] ICE: SIGSEGV in forward_propagate_and_simplify (fwprop.c:1417) with -O -g -fno-tree-dce since r10-3985-g8b8ab8f473b42933b9c1e292c4b1ab02adf1863a marxin at gcc dot gnu.org
                   ` (3 more replies)
  0 siblings, 4 replies; 5+ messages in thread
From: zsojka at seznam dot cz @ 2020-03-23 19:02 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94292

            Bug ID: 94292
           Summary: [10 Regression] ICE: SIGSEGV in
                    forward_propagate_and_simplify (fwprop.c:1417) with -O
                    -g -fno-tree-dce
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: armv7a-hardfloat-linux-gnueabi

Created attachment 48101
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48101&action=edit
reduced testcase

Compiler output:
$ armv7a-hardfloat-linux-gnueabi-gcc -O -g -fno-tree-dce testcase.c -wrapper
valgrind,-q
==29911== Invalid read of size 2
==29911==    at 0x19BF0D3: forward_propagate_and_simplify (fwprop.c:1417)
==29911==    by 0x19BF0D3: forward_propagate_into(df_ref_d*, bool)
(fwprop.c:1490)
==29911==    by 0x19BFDA9: fwprop(bool) (fwprop.c:1580)
==29911==    by 0xF44C0E: execute_one_pass(opt_pass*) (passes.c:2502)
==29911==    by 0xF453BF: execute_pass_list_1(opt_pass*) (passes.c:2590)
==29911==    by 0xF453D1: execute_pass_list_1(opt_pass*) (passes.c:2591)
==29911==    by 0xF453F8: execute_pass_list(function*, opt_pass*)
(passes.c:2601)
==29911==    by 0xBA8FDB: cgraph_node::expand() (cgraphunit.c:2300)
==29911==    by 0xBAA07F: expand_all_functions (cgraphunit.c:2471)
==29911==    by 0xBAA07F: symbol_table::compile() [clone .part.0]
(cgraphunit.c:2821)
==29911==    by 0xBAC7EC: compile (cgraphunit.c:2734)
==29911==    by 0xBAC7EC: symbol_table::finalize_compilation_unit()
(cgraphunit.c:3001)
==29911==    by 0x103F13A: compile_file() (toplev.c:483)
==29911==    by 0xA15047: do_compile (toplev.c:2273)
==29911==    by 0xA15047: toplev::main(int, char**) (toplev.c:2412)
==29911==    by 0xA178BE: main (main.c:39)
==29911==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==29911== 
during RTL pass: fwprop1
testcase.c: In function 'foo':
testcase.c:9:1: internal compiler error: Segmentation fault
    9 | }
      | ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.

$ armv7a-hardfloat-linux-gnueabi-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-armv7a-hardfloat/bin/armv7a-hardfloat-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r10-7327-20200323085706-g2fa4b1ffd6e-checking-yes-rtl-df-extra-pr94286-armv7a-hardfloat/bin/../libexec/gcc/armv7a-hardfloat-linux-gnueabi/10.0.1/lto-wrapper
Target: armv7a-hardfloat-linux-gnueabi
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --with-float=hard --with-fpu=vfpv4
--with-arch=armv7-a --with-sysroot=/usr/armv7a-hardfloat-linux-gnueabi
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=armv7a-hardfloat-linux-gnueabi
--with-ld=/usr/bin/armv7a-hardfloat-linux-gnueabi-ld
--with-as=/usr/bin/armv7a-hardfloat-linux-gnueabi-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r10-7327-20200323085706-g2fa4b1ffd6e-checking-yes-rtl-df-extra-pr94286-armv7a-hardfloat
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.0.1 20200323 (experimental) (GCC)

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2020-03-23 19:02 [Bug rtl-optimization/94292] New: [10 Regression] ICE: SIGSEGV in forward_propagate_and_simplify (fwprop.c:1417) with -O -g -fno-tree-dce zsojka at seznam dot cz
2020-03-24  7:06 ` [Bug rtl-optimization/94292] [10 Regression] ICE: SIGSEGV in forward_propagate_and_simplify (fwprop.c:1417) with -O -g -fno-tree-dce since r10-3985-g8b8ab8f473b42933b9c1e292c4b1ab02adf1863a marxin at gcc dot gnu.org
2020-03-24 12:17 ` [Bug target/94292] " jakub at gcc dot gnu.org
2020-03-25 18:07 ` cvs-commit at gcc dot gnu.org
2020-03-25 18:09 ` jakub at gcc dot gnu.org

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