From 3d489bc712a95777f917e16ae38a8e78935d6f11 Mon Sep 17 00:00:00 2001 From: Maxim Kuvyrkov Date: Tue, 27 Jul 2010 19:36:31 +0000 Subject: [PATCH] * gcse.c (hoist_code): Generate new pseudo for every new set insn. From-SVN: r162591 --- gcc/ChangeLog | 4 ++++ gcc/gcse.c | 8 ++++++-- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d39fbfca76f..36c9a1b571e 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2010-07-27 Maxim Kuvyrkov + + * gcse.c (hoist_code): Generate new pseudo for every new set insn. + 2010-07-27 Maxim Kuvyrkov PR rtl-optimization/40956 diff --git a/gcc/gcse.c b/gcc/gcse.c index 4b2547c3367..812cc0a888d 100644 --- a/gcc/gcse.c +++ b/gcc/gcse.c @@ -4581,8 +4581,12 @@ hoist_code (void) /* Create a pseudo-reg to store the result of reaching expressions into. Get the mode for the new pseudo - from the mode of the original destination pseudo. */ - if (expr->reaching_reg == NULL) + from the mode of the original destination pseudo. + + It is important to use new pseudos whenever we + emit a set. This will allow reload to use + rematerialization for such registers. */ + if (!insn_inserted_p) expr->reaching_reg = gen_reg_rtx_and_attrs (SET_DEST (set));