From 385b2d31707ecceb0b35e1a6ca67886d9d62636f Mon Sep 17 00:00:00 2001 From: Seongbae Park Date: Thu, 15 Mar 2007 23:48:13 +0000 Subject: [PATCH] re PR tree-optimization/30590 (tree-nrv optimization clobbers return variable) 2007-03-15 Seongbae Park PR tree-optimization/30590 * tree-nrv.c (tree_nrv): Check for the partial update of the return value. From-SVN: r122964 --- gcc/ChangeLog | 6 ++++++ gcc/tree-nrv.c | 8 ++++++++ 2 files changed, 14 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e8e0025a3d2e..488f0fec3a10 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2007-03-15 Seongbae Park + + PR tree-optimization/30590 + * tree-nrv.c (tree_nrv): Check for the partial update + of the return value. + 2007-03-14 Ian Lance Taylor * tree-vrp.c (value_inside_range): Ignore fold warnings. diff --git a/gcc/tree-nrv.c b/gcc/tree-nrv.c index f51afdb258c2..e7801abdf325 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) == MODIFY_EXPR) + { + tree addr = get_base_address (TREE_OPERAND (stmt, 0)); + /* If there's any MODIFY of component of RESULT, + then bail out. */ + if (addr && addr == result) + return 0; + } } }