https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113491
Bug ID: 113491
Summary: ICE: SIGSEGV in make_ssa_name_fn
(tree-ssanames.cc:354) at -Os with _BitInt() used as
switch control expression
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
CC: jakub at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 57146
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57146&action=edit
reduced testcase (from gcc.c-torture/compile/pr34093.c -Dint=_BitInt(617) )
Compiler output:
$ x86_64-pc-linux-gnu-gcc -Os testcase.c -wrapper valgrind,-q
==8560== Invalid read of size 2
==8560== at 0x177D8AA: make_ssa_name_fn(function*, tree_node*, gimple*,
unsigned int) (tree-ssanames.cc:354)
==8560== by 0x1610EB2: make_ssa_name (tree-ssanames.h:98)
==8560== by 0x1610EB2:
tree_switch_conversion::switch_conversion::build_arrays()
(tree-switch-conversion.cc:727)
==8560== by 0x1611296:
tree_switch_conversion::switch_conversion::expand(gswitch*) [clone .part.0]
(tree-switch-conversion.cc:1067)
==8560== by 0x161135A: expand (tree-switch-conversion.cc:2546)
==8560== by 0x161135A: (anonymous
namespace)::pass_convert_switch::execute(function*)
(tree-switch-conversion.cc:2564)
==8560== by 0x13CC03A: execute_one_pass(opt_pass*) (passes.cc:2646)
==8560== by 0x13CC92F: execute_pass_list_1(opt_pass*) (passes.cc:2755)
==8560== by 0x13CC941: execute_pass_list_1(opt_pass*) (passes.cc:2756)
==8560== by 0x13CC968: execute_pass_list(function*, opt_pass*)
(passes.cc:2766)
==8560== by 0x13CD28C: do_per_function_toporder(void (*)(function*, void*),
void*) [clone .part.0] (passes.cc:1773)
==8560== by 0x13CD4BE: do_per_function_toporder (passes.cc:1740)
==8560== by 0x13CD4BE: execute_ipa_pass_list(opt_pass*) (passes.cc:3100)
==8560== by 0xFCDD37: ipa_passes (cgraphunit.cc:2211)
==8560== by 0xFCDD37: symbol_table::compile() [clone .part.0]
(cgraphunit.cc:2332)
==8560== by 0xFD05B7: compile (cgraphunit.cc:2312)
==8560== by 0xFD05B7: symbol_table::finalize_compilation_unit()
(cgraphunit.cc:2584)
==8560== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==8560==
during GIMPLE pass: switchconv
testcase.c: In function 'foo':
testcase.c:263:1: internal compiler error: Segmentation fault
263 | }
| ^
0x150ddef crash_signal
/repo/gcc-trunk/gcc/toplev.cc:317
0x177d8aa make_ssa_name_fn(function*, tree_node*, gimple*, unsigned int)
/repo/gcc-trunk/gcc/tree-ssanames.cc:354
0x1610eb2 make_ssa_name(tree_node*, gimple*)
/repo/gcc-trunk/gcc/tree-ssanames.h:98
0x1610eb2 tree_switch_conversion::switch_conversion::build_arrays()
/repo/gcc-trunk/gcc/tree-switch-conversion.cc:727
0x1611296 tree_switch_conversion::switch_conversion::expand(gswitch*)
/repo/gcc-trunk/gcc/tree-switch-conversion.cc:1067
0x161135a tree_switch_conversion::switch_conversion::expand(gswitch*)
/repo/gcc-trunk/gcc/tree-switch-conversion.cc:2546
0x161135a execute
/repo/gcc-trunk/gcc/tree-switch-conversion.cc:2564
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