[Bug ipa/103513] New: [12 Regression] ICE in evaluate_conditions_for_known_args, at ipa-fnsummary.c:516 with -O2 and above

[haoxintu at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103513

            Bug ID: 103513
           Summary: [12 Regression] ICE in
                    evaluate_conditions_for_known_args, at
                    ipa-fnsummary.c:516 with -O2 and above
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: haoxintu at gmail dot com
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

Hi all.

It seems to be a recent regression issue.

$cat small.c
#include <stdint.h>
uint16_t(a)();
uint16_t(b)(int f, int g) { return f * g; }
uint64_t c();
void d() { c(a()); }
uint64_t c(int e) {
  for (;;)
    if (b(20, -1L == e))
      for (;;)
        ;
   return 0;
}


$gcc -c -O2 small.c
during IPA pass: inline
small.c:12:1: internal compiler error: in evaluate_conditions_for_known_args,
at ipa-fnsummary.c:516
   12 | }
      | ^
0x6c881e evaluate_conditions_for_known_args
        ../../gcc/ipa-fnsummary.c:516
0xa6133f do_estimate_edge_size(cgraph_edge*)
        ../../gcc/ipa-inline-analysis.c:330
0xa6247a estimate_edge_size
        ../../gcc/ipa-inline.h:79
0xa6247a estimate_edge_growth
        ../../gcc/ipa-inline.h:100
0xa6247a do_estimate_growth_1
        ../../gcc/ipa-inline-analysis.c:429
0xa625fd cgraph_node::call_for_symbol_and_aliases(bool (*)(cgraph_node*,
void*), void*, bool)
        ../../gcc/cgraph.h:3411
0xa625fd estimate_growth(cgraph_node*)
        ../../gcc/ipa-inline-analysis.c:467
0x18d8d6c inline_small_functions
        ../../gcc/ipa-inline.c:1980
0x18d8d6c ipa_inline
        ../../gcc/ipa-inline.c:2743
0x18d8d6c execute
        ../../gcc/ipa-inline.c:3142
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.

$gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/haoxin/haoxin-data/compilers/gcc/build/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure
--prefix=/home/haoxin/haoxin-data/compilers/gcc/build --enable-bootstrap
--enable-checking=release --enable-languages=c,c++ --enable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20211130 (experimental) (GCC)


Can also quickly check here: https://godbolt.org/z/W18G8jn7E

Thanks,
Haoxin