https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87201
Bug ID: 87201
Summary: [9 Regression] Segfault in GIMPLE pass: switchlower_O0
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Build: x86_64-pc-linux-gnu
Created attachment 44650
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44650&action=edit
Test case, compiled with "g++ test.ii"
That's with GCC 9. I did this morning a bootstrip (incremental build) with
r264051 - and installed it. A "git pull" then made r264052 available. Using the
previous build as system compiler failed with:
../../gcc/genoutput.c:276:1: internal compiler error: Segmentation fault
(Attached is a more simplified test case, which crashes my r264051.
TODO: bisect; [me: use clean GCC bootstrap not incremental build].)
g++ -w input21.ii
during GIMPLE pass: switchlower_O0
input21.ii: In function ‘long unsigned int ParseBinary(const char*,
XPParser**)’:
input21.ii:7:26: internal compiler error: Segmentation fault
7 | static long unsigned int ParseBinary (const char *str, XPParser ** p) {
| ^~~~~~~~~~~
0xed326f crash_signal
../../gcc/toplev.c:325
0xfb4198
tree_switch_conversion::switch_decision_tree::balance_case_nodes(tree_switch_conversion::case_tree_node**,
tree_switch_conversion::case_tree_node*)
../../gcc/tree-switch-conversion.c:1944
0xfb4fca tree_switch_conversion::switch_decision_tree::emit(basic_block_def*,
tree_node*, profile_probability, tree_node*)
../../gcc/tree-switch-conversion.c:1869
0xfb634e
tree_switch_conversion::switch_decision_tree::try_switch_expansion(vec<tree_switch_conversion::cluster*,
va_heap, vl_ptr>&)
../../gcc/tree-switch-conversion.c:1783
0xfb6c2f
tree_switch_conversion::switch_decision_tree::analyze_switch_statement()
../../gcc/tree-switch-conversion.c:1709
0xfb72c2 execute
../../gcc/tree-switch-conversion.c:2444
