diff options
Diffstat (limited to 'meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0002-Backport-from-mainline.patch')
| -rw-r--r-- | meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0002-Backport-from-mainline.patch | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0002-Backport-from-mainline.patch b/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0002-Backport-from-mainline.patch new file mode 100644 index 0000000000..27e1a88278 --- /dev/null +++ b/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0002-Backport-from-mainline.patch @@ -0,0 +1,70 @@ +From af3385141f9bfe32ab89165bfc98a7ea2ff19278 Mon Sep 17 00:00:00 2001 +From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> +Date: Sat, 26 Mar 2011 09:19:36 +0000 +Subject: [PATCH 002/200] Backport from mainline + 2011-03-17 Jakub Jelinek <jakub@redhat.com> + + PR rtl-optimization/48141 + * dse.c (record_store): If no positions are needed in an insn + that cannot be deleted, at least unchain it from active_local_stores. + + * gcc.dg/pr48141.c: New test. + + +git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@171545 138bc75d-0d04-0410-961f-82ee72b054a4 + +index 8e9b645..e43ab72 100644 +--- a/gcc/dse.c ++++ b/gcc/dse.c +@@ -1,5 +1,5 @@ + /* RTL dead store elimination. +- Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 ++ Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 + Free Software Foundation, Inc. + + Contributed by Richard Sandiford <rsandifor@codesourcery.com> +@@ -1530,8 +1530,7 @@ record_store (rtx body, bb_info_t bb_info) + + /* An insn can be deleted if every position of every one of + its s_infos is zero. */ +- if (any_positions_needed_p (s_info) +- || ptr->cannot_delete) ++ if (any_positions_needed_p (s_info)) + del = false; + + if (del) +@@ -1543,7 +1542,8 @@ record_store (rtx body, bb_info_t bb_info) + else + active_local_stores = ptr->next_local_store; + +- delete_dead_store_insn (insn_to_delete); ++ if (!insn_to_delete->cannot_delete) ++ delete_dead_store_insn (insn_to_delete); + } + else + last = ptr; +new file mode 100644 +index 0000000..006f5cb +--- /dev/null ++++ b/gcc/testsuite/gcc.dg/pr48141.c +@@ -0,0 +1,17 @@ ++/* PR rtl-optimization/48141 */ ++/* { dg-do compile } */ ++/* { dg-options "-O" } */ ++ ++#define A i = 0; ++#define B A A A A A A A A A A ++#define C B B B B B B B B B B ++#define D C C C C C C C C C C ++#define E D D D D D D D D D D ++ ++int ++foo (void) ++{ ++ volatile int i = 0; ++ E E E E E E E E E E E ++ return 0; ++} +-- +1.7.0.4 + |