From def703386a1efb5e48b24b1457ce679667e137c9 Mon Sep 17 00:00:00 2001 From: Segher Boessenkool Date: Wed, 14 Mar 2018 13:24:21 +0100 Subject: [PATCH] combine: Don't make log_links for pc_rtx (PR84780 #c10) distribute_links tries to place a log_link for whatever the destination of the modified instruction is. It shouldn't do that when that dest is pc_rtx, which isn't actually a register. * combine.c (distribute_links): Don't make a link based on pc_rtx. From-SVN: r258523 --- gcc/ChangeLog | 5 +++++ gcc/combine.c | 3 +++ 2 files changed, 8 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 104e442..fcd11eb 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2018-03-14 Segher Boessenkool + + PR rtl-optimization/84780 + * combine.c (distribute_links): Don't make a link based on pc_rtx. + 2018-03-14 Martin Liska * tree.c (record_node_allocation_statistics): Use diff --git a/gcc/combine.c b/gcc/combine.c index 06a9ddd..ff672ad 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -14778,6 +14778,9 @@ distribute_links (struct insn_link *links) || GET_CODE (reg) == SUBREG) reg = XEXP (reg, 0); + if (reg == pc_rtx) + continue; + /* A LOG_LINK is defined as being placed on the first insn that uses a register and points to the insn that sets the register. Start searching at the next insn after the target of the link and stop -- 2.7.4