From: vmakarov Date: Mon, 15 Dec 2014 20:04:04 +0000 (+0000) Subject: 2014-12-15 Vladimir Makarov X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=3130aced56fbe6671146fec8b84cf888ecfea122;p=thirdparty%2Fgcc.git 2014-12-15 Vladimir Makarov PR target/62642 * ira.c (rtx_moveable_p): Prevent UNSPEC_VOLATILE moves. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@218761 138bc75d-0d04-0410-961f-82ee72b054a4 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 8276d646c5d8..87ee0f9f4757 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,9 +1,14 @@ +2014-12-15 Vladimir Makarov + + PR target/62642 + * ira.c (rtx_moveable_p): Prevent UNSPEC_VOLATILE moves. + 2014-12-15 Vladimir Makarov * ira-int.h (ira_prohibited_class_mode_regs): Remove. (struct target_ira_int): Move x_ira_prohibited_class_mode_regs to ... - * ira.h (struct target_ira_int): ... here. + * ira.h (struct target_ira): ... here. (ira_prohibited_class_mode_regs): Define. * lra-constraints.c (process_alt_operands): Add one more condition to refuse alternative when reload pseudo of given class can not diff --git a/gcc/ira.c b/gcc/ira.c index e610d3581776..f08aa23e408d 100644 --- a/gcc/ira.c +++ b/gcc/ira.c @@ -4358,6 +4358,12 @@ rtx_moveable_p (rtx *loc, enum op_type type) case CLOBBER: return rtx_moveable_p (&SET_DEST (x), OP_OUT); + case UNSPEC_VOLATILE: + /* It is a bad idea to consider insns with with such rtl + as moveable ones. The insn scheduler also considers them as barrier + for a reason. */ + return false; + default: break; }