From 9790c19e52e65814d6c738fe0e31e25e93f3f4cb Mon Sep 17 00:00:00 2001 From: Jakub Jelinek Date: Wed, 30 Nov 2011 19:58:33 +0100 Subject: re PR rtl-optimization/48721 (ICE: verify_flow_info failed: missing barrier after block 6 with -foptimize-sibling-calls -fsched2-use-superblocks) PR rtl-optimization/48721 * sched-deps.c (sched_analyze_insn): For SIBLING_CALL_P set reg_pending_barrier to TRUE_BARRIER. * gcc.target/i386/pr48721.c: New test. From-SVN: r181856 --- gcc/sched-deps.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'gcc/sched-deps.c') diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c index 043204a..af2892d 100644 --- a/gcc/sched-deps.c +++ b/gcc/sched-deps.c @@ -2873,7 +2873,11 @@ sched_analyze_insn (struct deps_desc *deps, rtx x, rtx insn) else sched_analyze_2 (deps, XEXP (link, 0), insn); } - if (find_reg_note (insn, REG_SETJMP, NULL)) + /* Don't schedule anything after a tail call, tail call needs + to use at least all call-saved registers. */ + if (SIBLING_CALL_P (insn)) + reg_pending_barrier = TRUE_BARRIER; + else if (find_reg_note (insn, REG_SETJMP, NULL)) reg_pending_barrier = MOVE_BARRIER; } -- cgit v1.1