https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107976
Bug ID: 107976
Summary: ICE: SIGSEGV (stack overflow) in
emit_case_dispatch_table (stmt.cc:783) with large
--param=jump-table-max-growth-ratio-for-speed
Product: gcc
Version: 13.0
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
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 54018
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54018&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc
--param=jump-table-max-growth-ratio-for-speed=1813160384 testcase.c
x86_64-pc-linux-gnu-gcc: internal compiler error: Segmentation fault signal
terminated program cc1
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.
Program received signal SIGSEGV, Segmentation fault.
0x000000000138aa18 in emit_case_dispatch_table (index_expr=0x7ffff770be58,
index_type=0x7ffff771f5e8, case_list=..., default_label=0x7ffff771a2c0,
default_edge=0x7ffff78d23f0, minval=0x7ffff7885fc0, maxval=0x7ffff78b59d8,
range=0x7ffff78d7a98, stmt_bb=0x7ffff78ad600) at
/repo/gcc-trunk/gcc/stmt.cc:783
783 memset (labelvec, 0, ncases * sizeof (rtx));
(gdb) list
778
779 /* Get table of labels to jump to, in order of case index. */
780
781 ncases = tree_to_shwi (range) + 1;
782 labelvec = XALLOCAVEC (rtx, ncases);
783 memset (labelvec, 0, ncases * sizeof (rtx));
784
785 for (unsigned j = 0; j < case_list.length (); j++)
786 {
787 simple_case_node *n = &case_list[j];
(gdb) p ncases
$1 = 69108865
