https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88596
Bug ID: 88596 Summary: [9 Regression] ICE: Maximum number of LRA assignment passes is achieved (30) Product: gcc Version: 9.0 Status: UNCONFIRMED Keywords: ice-on-valid-code, ra Severity: normal Priority: P3 Component: rtl-optimization Assignee: unassigned at gcc dot gnu.org Reporter: asolokha at gmx dot com Target Milestone: --- Target: x86_64-unknown-linux-gnu gcc-9.0.0-alpha20181223 snapshot (r267388) ICEs when compiling the following snippet at any optimization level except -Os and w/ -fschedule-insns -fselective-scheduling --param selsched-max-lookahead=78: struct { _Complex char ka; } t6, n3, cf, uq, w9; void r9 (); void he (); void b3 (); void px (void) { r9 (t6, t6, n3, t6, n3, cf); r9 (t6, t6, n3, n3, cf, cf); r9 (t6, t6, n3, n3, cf, uq); r9 (t6, t6, n3, n3, cf, cf); r9 (t6, n3, t6, cf, uq, w9); he (t6, t6, t6, t6); he (t6, t6, t6, t6); he (t6, t6, t6, t6); b3 (t6, t6, t6, t6, t6); } % x86_64-unknown-linux-gnu-gcc-9.0.0-alpha20181223 -O1 -fschedule-insns -fselective-scheduling --param selsched-max-lookahead=78 -c a76zvftd.c during RTL pass: reload a76zvftd.c: In function 'px': a76zvftd.c:26:1: internal compiler error: Maximum number of LRA assignment passes is achieved (30) 26 | } | ^ 0xb8ec17 lra_assign(bool&) /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181223/work/gcc-9-20181223/gcc/lra-assigns.c:1672 0xb897ad lra(_IO_FILE*) /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181223/work/gcc-9-20181223/gcc/lra.c:2520 0xb40a19 do_reload /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181223/work/gcc-9-20181223/gcc/ira.c:5475 0xb40a19 execute /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181223/work/gcc-9-20181223/gcc/ira.c:5659