https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71379
Bug ID: 71379 Summary: [7 regression] Bootstrap fail on S/390 32 bit starting with r236831 Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: krebbel at gcc dot gnu.org Target Milestone: --- S/390 32 bit bootstrap appears to fail in stage 2 starting with r236831: In file included from /home/andreas/clean/../gcc/gcc/config/s390/s390.c:41:0: /home/andreas/clean/../gcc/gcc/recog.h: In function 'rtx_def* s390_expand_builtin(tree, rtx, rtx, machine_mode, int)': /home/andreas/clean/../gcc/gcc/recog.h:306:136: error: 'op[5]' may be used uninitialized in this function [-Werror=maybe-uninitialized] rtx_insn * operator () (rtx a0, rtx a1, rtx a2, rtx a3, rtx a4, rtx a5, rtx a6) const { return ((f7)func) (a0, a1, a2, a3, a4, a5, a6); } ^ /home/andreas/clean/../gcc/gcc/config/s390/s390.c:799:7: note: 'op[5]' was declared here rtx op[MAX_ARGS], pat; ^~ Probably related or even duplicates of PR71335 or PR71316. Unfortunately there was another commit causing a bootstrap fail in that timeframe which needs to be reverted first: r236826. That commit got reverted with r236850 anyway.