From 3eb239f48bf0ca6ed149a3f0ff114f55ecaad978 Mon Sep 17 00:00:00 2001 From: Segher Boessenkool Date: Fri, 19 Dec 2014 20:55:32 +0100 Subject: [PATCH] re PR target/64268 (bootstrap failure (ICE in wide_int_to_tree, at tree.c:1438) on powerpc in libgcc, stage2) PR target/64268 * combine.c (try_combine): Immediately return if any of I0,I1,I2 are the same insn. From-SVN: r218971 --- gcc/ChangeLog | 6 ++++++ gcc/combine.c | 5 +++++ 2 files changed, 11 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e5733ae9c88..a800fed4a18 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2014-12-19 Segher Boessenkool + + PR target/64268 + * combine.c (try_combine): Immediately return if any of I0,I1,I2 + are the same insn. + 2014-12-19 Alan Lawrence * config/aarch64/aarch64.c (_one_cmpl3): 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. */ -- 2.30.2