From 99f34dd57e154e1cf3d3858219cbf16cae9db537 Mon Sep 17 00:00:00 2001 From: segher Date: Fri, 19 Dec 2014 19:55:32 +0000 Subject: PR target/64268 * combine.c (try_combine): Immediately return if any of I0,I1,I2 are the same insn. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@218971 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/combine.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'gcc/combine.c') diff --git a/gcc/combine.c b/gcc/combine.c index ee7b3f9ec5f..212da3320f3 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2588,6 +2588,11 @@ try_combine (rtx_insn *i3, rtx_insn *i2, rtx_insn *i1, rtx_insn *i0, rtx new_other_notes; int i; + /* Immediately return if any of I0,I1,I2 are the same insn (I3 can + never be). */ + if (i1 == i2 || i0 == i2 || (i0 && i0 == i1)) + return 0; + /* Only try four-insn combinations when there's high likelihood of success. Look for simple insns, such as loads of constants or binary operations involving a constant. */ -- cgit v1.2.1