From e31657e8129711f53f3fd09d846b54bd1b5cfb39 Mon Sep 17 00:00:00 2001 From: Seongbae Park Date: Wed, 14 Mar 2007 05:48:35 +0000 Subject: [PATCH] re PR tree-optimization/30590 (tree-nrv optimization clobbers return variable) 2007-03-13 Seongbae Park PR tree-optimization/30590 * tree-nrv.c (tree_nrv): Check for the partial update of the return value. From-SVN: r122909 --- gcc/ChangeLog | 6 ++++++ gcc/tree-nrv.c | 8 ++++++++ 2 files changed, 14 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 45d009db9e5..1e5a199e178 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2007-03-13 Seongbae Park + + PR tree-optimization/30590 + * tree-nrv.c (tree_nrv): Check for the partial update of the + return value. + 2007-03-13 Alexandre Oliva * flags.h (flag_random_seed): Remove declaration, in favor of... diff --git a/gcc/tree-nrv.c b/gcc/tree-nrv.c index c33ff0ea31a..906b98fbc8a 100644 --- a/gcc/tree-nrv.c +++ b/gcc/tree-nrv.c @@ -163,6 +163,14 @@ tree_nrv (void) result_type)) return 0; } + else if (TREE_CODE (stmt) == GIMPLE_MODIFY_STMT) + { + tree addr = get_base_address (GIMPLE_STMT_OPERAND (stmt, 0)); + /* If there's any MODIFY of component of RESULT, + then bail out. */ + if (addr && addr == result) + return 0; + } } }