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| author | Richard Kenner <kenner@gcc.gnu.org> | 1995-08-15 17:51:44 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1995-08-15 17:51:44 -0400 |
| commit | f4510f3757fc32ae871aa5e7c77a078590b173ed (patch) | |
| tree | cae8239f4fe3b6438526e40831373f0e771a33b9 /gcc | |
| parent | e07ed33f92f226ad40e10f17a53028a4659196d7 (diff) | |
| download | gcc-f4510f3757fc32ae871aa5e7c77a078590b173ed.zip gcc-f4510f3757fc32ae871aa5e7c77a078590b173ed.tar.gz gcc-f4510f3757fc32ae871aa5e7c77a078590b173ed.tar.bz2 | |
(safe_from_p): Only safe if EXP is variable-size and X is BLKmode.
From-SVN: r10243
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/expr.c | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -3814,9 +3814,11 @@ safe_from_p (x, exp) /* If EXP has varying size, we MUST use a target since we currently have no way of allocating temporaries of variable size. So we assume here that something at a higher level has prevented a - clash. This is somewhat bogus, but the best we can do. */ + clash. This is somewhat bogus, but the best we can do. Only + do this when X is BLKmode. */ || (TREE_TYPE (exp) != 0 && TYPE_SIZE (TREE_TYPE (exp)) != 0 - && TREE_CODE (TYPE_SIZE (TREE_TYPE (exp))) != INTEGER_CST)) + && TREE_CODE (TYPE_SIZE (TREE_TYPE (exp))) != INTEGER_CST + && GET_MODE (x) == BLKmode)) return 1; /* If this is a subreg of a hard register, declare it unsafe, otherwise, |