From bd7e4636d946650249b6c430d33e6ccb70eb302a Mon Sep 17 00:00:00 2001
From: Roger Sayle <roger@eyesopen.com>
Date: Thu, 4 Jan 2007 23:00:00 +0000
Subject: [PATCH] fold-const.c (fold_convert): When casting an expression to
void...
* fold-const.c (fold_convert): When casting an expression to void,
fold_ignored_result may discover a GIMPLE_MODIFY_STMT which doesn't
have a type. Instead of attempting to build a NOP_EXPR, return
these "special" trees directly.
From-SVN: r120451
---
gcc/ChangeLog | 7 +++++++
gcc/fold-const.c | 5 ++++-
2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c6b21eb1b69f..3f81da506274 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2007-01-04 Roger Sayle <roger@eyesopen.com>
+
+ * fold-const.c (fold_convert): When casting an expression to void,
+ fold_ignored_result may discover a GIMPLE_MODIFY_STMT which doesn't
+ have a type. Instead of attempting to build a NOP_EXPR, return
+ these "special" trees directly.
+
2007-01-04 Joseph Myers <joseph@codesourcery.com>
* config/rs6000/rs6000.c (rs6000_rtx_costs): Make adjustment for
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 8826908054d4..559acf018adf 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -2144,7 +2144,10 @@ fold_convert (tree type, tree arg)
return fold_build1 (VIEW_CONVERT_EXPR, type, arg);
case VOID_TYPE:
- return fold_build1 (NOP_EXPR, type, fold_ignored_result (arg));
+ tem = fold_ignored_result (arg);
+ if (TREE_CODE (tem) == GIMPLE_MODIFY_STMT)
+ return tem;
+ return fold_build1 (NOP_EXPR, type, tem);
default:
gcc_unreachable ();
--
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