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| author | kenner <kenner@138bc75d-0d04-0410-961f-82ee72b054a4> | 1993-09-30 09:53:43 +0000 |
|---|---|---|
| committer | kenner <kenner@138bc75d-0d04-0410-961f-82ee72b054a4> | 1993-09-30 09:53:43 +0000 |
| commit | b5d70b4f16576e5c34d806799ff7753059174c3b (patch) | |
| tree | 18a2264104fdb1ab3e8d129ed1fceb036e86bc5c /gcc/fold-const.c | |
| parent | f698a3d1f02f759f8a91d54f066fa2a720aad5a8 (diff) | |
| download | gcc-b5d70b4f16576e5c34d806799ff7753059174c3b.tar.gz | |
(fold, case PLUS_EXPR, MINUS_EXPR): Properly handle case when ARG1
splits and VARSIGN is -1.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@5537 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 62ead45de86..4e6aad4a0ce 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -3691,6 +3691,13 @@ fold (expr) if (split_tree (arg1, code, &var, &con, &varsign)) { + if (TREE_CONSTANT (arg1)) + return t; + + if (varsign == -1) + TREE_SET_CODE (t, + (code == PLUS_EXPR ? MINUS_EXPR : PLUS_EXPR)); + /* EXPR is ARG0 +- (CON +- VAR). */ if (TREE_CODE (t) == MINUS_EXPR && operand_equal_p (var, arg0, 0)) @@ -3701,11 +3708,7 @@ fold (expr) return fold (build1 (NEGATE_EXPR, TREE_TYPE (t), convert (TREE_TYPE (t), con))); } - if (TREE_CONSTANT (arg1)) - return t; - if (varsign == -1) - TREE_SET_CODE (t, - (code == PLUS_EXPR ? MINUS_EXPR : PLUS_EXPR)); + TREE_OPERAND (t, 0) = fold (build (code, TREE_TYPE (t), arg0, con)); TREE_OPERAND (t, 1) = var; |